ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (19,405)
  • 1985-1989  (19,405)
  • 1950-1954
  • 1987  (19,405)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (14,790)
  • Electrical Engineering, Measurement and Control Technology  (4,615)
Collection
  • Articles  (19,405)
Source
Keywords
Publisher
Years
  • 1985-1989  (19,405)
  • 1950-1954
Year
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Dynamics of Tornadic Thunderstorms (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 369-402 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.002101
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Magnetic Fluids (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 437-461 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.002253
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Recent Developments in Rapid-Distortion Theory (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 531-573 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.002531
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Rarefaction Waves in Liquid and Gas-Liquid Media (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 577-600 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.003045
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Ludwig Prandtl and His Kaiser-Wilhelm-Institut (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 1-26 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.000245
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Upstream Blocking and Airflow Over Mountains (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 75-95 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.000451
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Turbulent Secondary Flows (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 53-74 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.000413
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A Description of Eddying Motions and Flow Patterns Using Critical-Point Concepts (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 125-155 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.001013
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Viscoelastic Flows Through Contractions (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 157-182 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.001105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Viscous Fingering in Porous Media (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 271-311 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.001415
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 11
    Electronic Resource
    Electronic Resource
    Thermocapillary Instabilities (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 403-435 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.002155
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Isolated Eddy Models in Geophysics (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 19 (1987), S. 493-530 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.19.010187.002425
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Measurement of the errors in two radial diffraction gratings by their mutual intercomparison (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1768-1770 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Precision measurements of the mounting and ruling errors of two 32400 line radial gratings are described. The measurements were made by automatically intercomparing the gratings as they rotated, using ac moiré fringe techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139354
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    High-stability bimorph scanning tunneling microscope (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1343-1348 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel scanning tunneling microscope (STM) is described which is constructed almost entirely of aluminum and uses bimorph piezoelectric disks as the x,y,z drive elements. The design uses a simple, rugged tripod configuration for the fine motion drive arms. Coarse motion of the sample, which is mounted on an aluminum holder, is achieved by pushing or pulling, with a piezoelectric louse. Differential thermal expansion effects are avoided by design, to first order, and the resulting drift is ≤0.5 A(ring)/min after only a short warm-up period. It is easy to build and operate, and has good immunity to mechanical vibrations. The frequency response is flat to 5 kHz. The x,y,z drive sensitivity is 8 A(ring)/V and the range is ≥12000 A(ring). Some preliminary experimental results are presented, including atomic resolution images in air, of graphite and NbSe2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139658
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    Resonance-enhanced multiphoton ionization for diagnosis of a weakly ionized plasma (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1353-1361 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe an experimental setup in which resonance-enhanced multiphoton ionization (REMPI) is used for diagnosis of neutral particles (atoms or molecules) effusing from a plasma. Quantum-state-specific detection, achieved by selective ionization with the help of REMPI, yields the distribution over their internal degrees of freedom. Discrimination against nonlaser-produced ions is performed by means of the combination of an electric and a magnetic field. The applicability of the setup is demonstrated by the determination of the rotational temperature of ground-state hydrogen molecules in a multicusp ion source. Under nondischarge conditions a detection limit is achieved of ≈2×1010 state-selected hydrogen molecules/cm3, corresponding to a value of ≈7×108/cm3 at the analysis region. Under discharge conditions, this detection limit is deteriorated by the presence of metastable hydrogen molecules, which are ionized in a one-photon process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139415
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    Development of a high proton yield plasma source with multipole confinement and a magnetic filter (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1369-1381 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Proton yields in magnetic multipole sources can be increased by the creation of a magnetic "filter'' within the discharge volume, although this may introduce nonuniformity in the plasma. We have investigated the properties of a filter which can satisfy the requirements of plasma uniformity and discharge electrical efficiency and creates a proton yield of 87% when a 60-A beam is extracted at 80 keV. A model describing the behavior of the filter is also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139417
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    Electrical resistance measurements on cryocrystals in a diamond-anvil cell to 70 GPa (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 994-996 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A four-probe technique for measurement of electrical resistance and photoconductivity on cryocrystals in a diamond-anvil cell is described. The gasket and the method of fabrication of the electrical leads is discussed in detail. As an example, resistance and photoconductivity measurements on hydrogen iodide are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139588
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 18
    Electronic Resource
    Electronic Resource
    ac method for measuring low-frequency resistance fluctuation spectra (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 985-993 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An ac technique is described for measuring low-frequency resistance fluctuation spectra with improved sensitivity over dc methods achieved by avoiding preamplifier 1/f noise. The technique, easily implemented with decade resistors and a lock-in amplifier, allows the current noise of low-resistance (r〈10 kΩ) specimens to be measured to frequencies below 1 mHz. Use of a center-tapped, four-probe specimen geometry allows discrimination between specimen and contact noise and eliminates noise due to bath temperature variations. The technique is demonstrated in use to determine the dependence of the 1/f noise of Cr films on film area. Measurements with simultaneous direct and alternating currents provide means to study the noise of nonlinear devices and frequency-dependent conductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139587
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 19
    Electronic Resource
    Electronic Resource
    Modified Angström's method for measurement of thermal diffusivity of materials with low conductivity (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 997-1002 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Semiconducting Peltier devices are used as heat sources and sinks to apply sinusoidally varying temperature versus time profiles through square sheets of material. The thermal diffusivity may be determined by recording the temperature as a function of time at the interfaces of a stack of two or three sample sheets. The design of the experimental rig is described and its use is illustrated. The thermal diffusivity of a variety of poorly conducting materials such as ceramics and polymers, having a wide range of values of thermal diffusivity, may be measured using this approach by merely selecting the frequency and amplitude to allow for the thickness and material so as to be able to resolve the temperature phase differences and amplitudes at the junctions of the sheets. In this case, the technique is applied to the determination of thermal diffusivity of polyethylene by way of illustration of the method. Reproducibility and precision achieved throughout the temperature range 4–46 °C used was found to be no better than ±5%, but precision could be improved by interfacing the equipment with a computer. Good agreement was obtained with published values of thermal diffusivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139589
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 20
    Electronic Resource
    Electronic Resource
    Wide-band solids, rapid recovery, multinuclear transceiver/digitizer for a high-resolution NMR spectrometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 742-754 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A transceiver which is capable of observation of spectral widths of 1.6 MHz has been constructed as an accessory to a Bruker WH-400 NMR spectrometer. This device permits observation of the NMR resonances of solid-state quadrupolar nuclei, which may contain frequency components more than 1 MHz away from their fundamental precession frequencies. The transceiver contains its own frequency generation section, which employs the host spectrometer's master phase reference and synthesizer. The NMR signal undergoes image rejection mixing to an intermediate frequency above the observation band, and quadrature phase detection before final amplification with video speed operational amplifiers in the receiver section. Dual 8-bit, video speed digitizers feed the converted data to dual 16 kword deep buffers that can accept data at a rate of 4 Msamples/s. A slower data output rate is governed by the Bruker Aspect host computer. The noise figure of the device is 1.8 dB, with a sensitivity of at least −71 dBm and a recovery time of approximately 1 μs for linear amplification to resume after an excitation pulse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139625
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 21
    Electronic Resource
    Electronic Resource
    Microsecond time resolution on a conventional EPR spectrometer using 200-kHz magnetic field modulation and phase-sensitive detection (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 735-741 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A method is developed to detect electron paramagnetic resonance (EPR) transient signals with frequency components in the range from dc to 1 MHz and a low initial signal-to-noise ratio (e.g., 0.1 after one sweep). This method uses 200-kHz magnetic field modulation on a conventional EPR spectrometer, using a modified lock-in detector: the tuned amplifier is replaced by a broadband preamplifier with a high-pass filter and the low-pass filter of the lock-in detector is replaced by a broadband amplifier. The transients are generated incoherently from the magnetic field modulation, and subsequently averaged. The function of the (removed) low-pass filter is taken over by the averaging. An instrumental response time of less than 1 μs is obtained. This was determined by measuring the rise time of the triplet state of the photosynthetic reaction center of Rhodopseudomonas sphaeroides R-26 at 165 K. This method, direct detection, and high-frequency (1–2 MHz) modulation are discussed. The S/N ratio of the method described in this paper is similar to that of the other two methods. However, when large linewidths (〉0.5 mT) are met, it gives a superior S/N ratio as compared to high-frequency (1–2 MHz) modulation methods, due to the higher maximum modulation amplitude. When the transients of interest contain frequency components in the low-frequency noise regime (dc–50 kHz), the described method is to be preferred over direct detection because of its better S/N ratio.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139624
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 22
    Electronic Resource
    Electronic Resource
    Efficient stator/rotor assembly for magic-angle spinning NMR (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 755-758 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A newly designed stator assembly for cylindrical spinners used in magic-angle spinning nuclear-magnetic-resonance experiments is described. Separate driving and bearing gas chambers allow variable and stable spinning speeds, and this design permits easy starting and stopping of the rotor. Isolation of the chambers is achieved with the application of pressure screws rather than O rings or glue lines to avoid leakage at high gas pressures. The overall dimensions are optimal to facilitate easy assembly. Some significant modifications have been made to an earlier spinner design. These improvements give better efficiency and concentricity of the spinner. Applications are illustrated with carbon-13 cross polarization/magic angle spinning (CP/MAS) spectra carried out at different rotor spinning rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139626
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 23
    Electronic Resource
    Electronic Resource
    Are the time resolutions for the conventional and the pseudorandom methods for time-of-flight analysis different? (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2138-2140 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The pseudorandom method for time-of-flight analysis has the advantage over the conventional method of a greatly improved efficiency, but, according to previous theory, the disadvantage that the time resolution is worse. Here we present an improved theory of pseudorandom modulation. We show that the resolution of this method and the conventional method are identical. This conclusion is in agreement with experimental results. The difference between the previously given and present treatment of the pseudorandom method for time-of-flight analysis is discussed. We show that the treatment given previously does not apply to a possible, real experiment, but only to the nonphysical case of an infinitely good time resolution. Second, we show that the additional broadening which was found previously for the pseudorandom method is not inherent to the method, but is due to a nonoptimal choice of the deconvolution function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139476
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 24
    Electronic Resource
    Electronic Resource
    Cell for absorption and fluorescence spectroscopy of high-pressure and high-temperature sodium vapor (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 768-771 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have constructed a 23-cm-long cell for spectroscopy of high-pressure sodium (and sodium–mercury) vapors at high temperatures. This cell operates in contrast to a heat pipe, without buffer gas. Sodium pressures up to 100 Torr (and mercury pressures up to 3000 Torr) have been obtained at temperatures up to 1500 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139629
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 25
    Electronic Resource
    Electronic Resource
    Interferometric microphone for optoacoustic spectroscopy (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 772-775 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A Fabry–Perot interferometer constructed with a pellicle beam splitter can be used as a sensitive microphone. Pressure disturbances inside the interferometer cavity alter the mirror separation, thereby changing the optical interference pattern. The optoacoustic effect can be detected in a cell attached to the Fabry–Perot interferometer by monitoring the change in intensity of the central interference fringe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139630
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 26
    Electronic Resource
    Electronic Resource
    Polychromatic x-ray beam produced by a wiggler: A new dimension in x-ray diffraction at megabar pressures (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1887-1890 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The wiggler provides a substantially higher flux of photons through a given collimator at high energies than is available from the bending magnet at the Cornell High Energy Synchrotron Source. This opens a new dimension in ultrapressure x-ray diffraction studies. Examples are shown in which a good diffraction pattern of gold at 112 GPa (1.12 Mbar) was obtained in 13 s and in which the diffraction pattern for primitive hexagonal silicon at 35 GPa using the beam from the wiggler contains twice as many peaks as is the case for the beam from the bending magnet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139537
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 27
    Electronic Resource
    Electronic Resource
    Sensitive gas-phase photoacoustic spectrometer with provision for simultaneous recording of absorption spectrum (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1871-1878 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design of a sensitive pulsed photoacoustic spectrometer system for studying media in gaseous phase in the visible and ultraviolet regions is described. The system provides for simultaneous recording of the laser absorption spectrum of the sample by measuring the radiation transmitted through the sample cell. A highly sensitive optogalvanic detection subassembly for recording the calibration spectrum and analog signal processing/averaging electronics including gated integrators also form part of the system. Typical sensitivities of detection are a few tens of picobar acoustic pressure disturbances induced through two-photon absorption in iodine vapor in the sample cell and 0.1 pC charge fluctuation induced in the neon/uranium hollow cathode discharge through optogalvanic effect. Typical recordings of the photoacoustic, laser absorption, and two-photon photoacoustic spectra of the saturated vapor of iodine at room temperature in the presence of air at atmospheric pressure are presented together with the optogalvanic calibration spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139535
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 28
    Electronic Resource
    Electronic Resource
    Three-dimensional computer simulation of ion beam scattering by an electrostatic reflector (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1901-1904 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A three-dimensional computer model was used to study the scattering of a reflected lithium ion beam by an electrostatic reflector. Results show that for ion gun systems for active space plasma experiment applications, beam scattering of less than 1° can be attained with electrostatic reflectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139663
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 29
    Electronic Resource
    Electronic Resource
    Large-area low-noise seven-channel dc SQUID magnetometer for brain research (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2145-2156 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design, construction, and performance of a new high-sensitivity dc SQUID magnetometer, covering a circular area of 93-mm diameter, is described. The device, now used routinely in our brain research, comprises seven asymmetric first-order gradiometers, located on a spherical surface of 125-mm radius and with the symmetry axis tilted 30° with respect to the vertical. The pickup coil diameter is 20 mm, and the channels are separated by 36.5 mm from each other in a hexagonal array. The overall field sensitivity of the system, measured inside our magnetically shielded room, is 5 fT/(Hz)1/2, mainly limited by the thermal noise in the radiation shields of the Dewar. The optimization of the coil configuration and the measurement system is discussed in detail, and a system to determine automatically the position and orientation of the Dewar with respect to certain fixed points on the subject's head is described. Finally, some examples of measurements carried out with the new device are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139478
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 30
    Electronic Resource
    Electronic Resource
    Improved Lyman-alpha hygrometer for small-scale atmospheric turbulence measurements. Part II: The O2 filtering technique (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2165-2171 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The detector of the IMST/SA-CNRS improved Lyman-alpha hygrometer is a solar-blind photomultiplier tube that ensures large signal-to-noise ratio and allows a miniaturization of the sampling volume. This PM tube has a relatively large spectral response and can detect, in addition to the Lyman-alpha line, hydrogen molecular transitions emitted by the discharge source between 120 and 180 nm. In order to avoid a spurious sensitivity to oxygen density fluctuations, an active filtering cell is added to absorb the undesired lines. The instrument sensitivity is calculated with the help of a two-gas, three-spectral-line UV-beam absorption model, fitted to calibration measurements. The technique of the active filtering associated with the three-line absorption model produces the following advantages: (1) reduced sensitivity to oxygen fluctuations, (2) a clear physical meaning to the model terms allowing the sensitivity computation in most conditions, (3) increased signal-to-noise ratio, and (4) in most conditions, improved sensitivity to water vapor compared to the monochromatic Lyman-alpha line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139480
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 31
    Electronic Resource
    Electronic Resource
    Ring wire anemometer—Part II: Measurement of small-scale turbulence (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2175-2180 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The ring wire, a circular hot-wire anemometer probe, orientated normal to the flow, is useful to measure turbulent scales in the dissipative range. It is less sensitive to angular positioning errors than straight wire sensors. Following the rationale of Wyngaard [J. Phys. E. 52, 1, 1105 (1968)], theoretical expressions are derived for the high wave number attenuation due to spatial resolution (line averaging). The expressions are applied to the estimation of longitudinal velocity spectrum and dissipation rate. The ring wire is shown to present much smaller attenuations than the straight wire of the same length or, inversely, to have a much higher sensitivity and frequency response than the straight wire of similar spatial resolution. The theoretical results are confirmed by experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139482
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 32
    Electronic Resource
    Electronic Resource
    Thermal expansion and piezoelectric response of PZT Channel 5800 for use in low-temperature scanning tunneling microscope designs (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2193-2195 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The thermal expansion of the ceramic piezoelectric material PZT Channel 5800 between 2 and 300 K is found to be anisotropic, being negative parallel to the poling direction and positive normal to this direction. The piezoelectric response is temperature dependent, decreasing significantly as the temperature is reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139486
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 33
    Electronic Resource
    Electronic Resource
    Scanning tunneling microscope for low temperature, high magnetic field, and spatially resolved spectroscopy (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1806-1810 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A scanning tunneling microscope capable of operating at low temperatures, T=400 mK, and in high magnetic fields, B=8 T, is described. Accompanying electronics, under the control of an IBM PC/AT, provide routine spatially resolved spectroscopy, allowing characterization of properties such as superconducting energy gaps and local density of states on the surface. Data are presented to illustrate the usefulness of spatially resolved spectroscopy at low temperatures and in high magnetic fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139524
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 34
    Electronic Resource
    Electronic Resource
    Quantitative assessment of a parallel detection system for energy-loss spectrometry (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1822-1829 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The concept of a spatial frequency-dependent, detective quantum efficiency [=DQE( f )] is applied to the performance assessment of a prototype parallel detection system for electron energy-loss spectrometry. The various factors which determine DQE( f ) in such a system are discussed and comparisons are made with a serial detection system. Also, the effects of the electron source energy spread on the overall spectrometer DQE( f ) are discussed. In these examples, the clear importance of including the spatial frequency dependence of DQE is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139526
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 35
    Electronic Resource
    Electronic Resource
    Single photon detection and timing system for a Lidar experiment (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1833-1839 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An instrument for photon counting measurements in a Lidar experiment is described. Single events can be stored up to rates of 25 MHz and it is capable of 4096 data acquisitions for each measurement. Time information by two successive photons is achieved with an accuracy better than 14 ns. The system is interfaced with an HP 1000F series computer. A window discriminator/shaper for formatting the photomultiplier pulses is also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139528
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 36
    Electronic Resource
    Electronic Resource
    Absolute scanning [NF(a1Δ)] and [NF(b1Σ)] diagnostic method for the N2F4+H2 system (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1856-1859 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The N2F4+H2 system is of interest for production of NF(a1Δ) as an energy-transfer species. Past studies have been plagued with the difficult NF(a1Δ) quantitative measurement due to interferences from the close-lying N2(B) and HF peaks. This paper deals with the development of a scanning diagnostic method to determine concentrations of NF(a1Δ) and NF(b1Σ) in the N2F4+H2 system and quantitative measurement of interferences with the diagnostic signal. The diagnostic method has been applied to a functioning high-pressure, high-temperature system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139532
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 37
    Electronic Resource
    Electronic Resource
    Lithium-free scintillation glasses for fast-neutron detection (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1905-1909 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this article, we present observed characteristics of new lithium-free scintillation glasses which have been developed to make time-resolved measurements of the 14-MeV neutron flux from deuterium plasmas. These measurements will yield information on the burnup of tritons in today's deuterium plasmas and are needed to better predict the confinement and slowdown of alpha particles in future D–T burning plasmas. The new glasses were formulated to have good detection efficiency for 14-MeV neutrons, and yet be insensitive to 2.5-MeV and lower-energy neutrons. The glass response to alpha, gamma, and neutron radiation is shown. The intrinsic neutron detection efficiency of the scintillation glass is seen to increase significantly as a function of neutron energy, providing the necessary discrimination against low-energy neutrons. We discuss the reactions which determine the glass neutron response and suggest that this response is dominated at higher neutron energies by gamma rays created by neutrons inelastically scattering from oxygen present in the glass. For high-energy neutron detection in the presence of excessive background gamma radiation, we discuss a new coincidence configuration of lithium-free scintillation glass with NE213 liquid scintillator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139487
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 38
    Electronic Resource
    Electronic Resource
    Development of a 1.5-tonne niobium gravitational radiational antenna (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1910-1916 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A 1.5-tonne Nb gravitational radiation antenna is described. Problems associated with a noncontacting magnetically levitated parametric upconverter transducer are discussed, and a system using a bonded microwave reentrant cavity and bonded mechanical impedance transformer is described and analyzed in detail. It is shown that such an antenna can be expected to achieve a noise temperature of ∼1 mK. An ultralow phase noise tunable microwave source for the transducer pump signal is described, as well as precision bonding techniques which yield a mechanical positioning accuracy of 10−6 m, and a reproducibility of 10−8 m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139488
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 39
    Electronic Resource
    Electronic Resource
    Development of a high-sensitivity, computer-controlled titration calorimeter (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1937-1941 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A highly sensitive, adiabatic titration calorimeter controlled by a personal computer is described. Operation of the entire calorimetric titration is automated, including the thermoelectric offset of the heat of stirring, the electrical calibration of the heat capacity, the addition of titrant, and the measurement of the heat of reaction. The average uncertainty in heat measurements was ≈±0.003 J for titrant additions generating 0.025 to 1.0 J of heat change in a 50-ml sample. Calibration of the calorimeter using tris-(hydroxymethyl) aminomethane [TRIS] gave excellent agreement with previously published values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139492
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 40
    Electronic Resource
    Electronic Resource
    Simple design for a frequency-independent voltage-controlled phase shifter (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1960-1962 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A very simple general-purpose phase shifter is described here, that can be linearly voltage controlled in a wide frequency range. This device allows us to implement the standard lock-in amplifier into a vector tracking lock-in amplifier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139502
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 41
    Electronic Resource
    Electronic Resource
    Frequency response of thin-film thermometers: A critical review (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 108-111 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The dynamic response of the platinum thin-film thermometer has been investigated. Our experimental results indicate that details of the probe form significantly affect the velocity scaling relationship for these probes. In particular, the theoretical relationship appears appropriate for probes with hemispherical tips with the thin film in the stagnation region, whereas the conical-tip probes in common usage deviate from the theory and require an empirical scaling relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139550
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 42
    Electronic Resource
    Electronic Resource
    Novel two-dimensional position-sensitive detection system (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 125-126 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel two-dimensional position-sensitive detection system has been designed, built, and tested. It has a relatively short processing time (900 ns) which enables countrates up to 105–106/s. The detector has a ring-shaped geometry. Both polar coordinates can be determined with an accuracy better than 1%. Although intended for use in an ion scattering spectrometer, the system can also be used for detection of other atomic particles or photons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139554
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 43
    Electronic Resource
    Electronic Resource
    Method for the determination of the value of the optical Kerr constant in weakly anisotropic liquids (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1949-1951 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple method is demonstrated to significantly improve the typical apparatus currently used in optical Kerr effect measurements and, in particular, to facilitate the investigation of weakly anisotropic liquids. This modified version of the apparatus is highly sensitive and at the same time easy to handle. Additionally, it presents the advantage of reducing errors from absorption, divergence, and inaccurate coaxiality of both laser beams in the measuring cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139496
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 44
    Electronic Resource
    Electronic Resource
    Capacitance bridge for low-temperature, high-resolution dielectric measurements (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 130-132 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A stable capacitance bridge has been designed to measure changes both in capacitance and in loss of three-terminal capacitors at temperatures ranging from 0.01 to 100 K. The circuit uses commercially available components, and has a resolution of better than 10−6. Also described is an anomalous voltage dependence present at low temperatures in capacitors which have electrodes applied using an evaporative or similar technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139540
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 45
    Electronic Resource
    Electronic Resource
    Excess noise of the R 928 photomultiplier (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 136-138 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The noise factor of the HAMAMATSU R 928 circular cage photomultiplier has been measured. It is demonstrated that the optimum mode of operation with respect to the noise is the one with constant interstage voltage distribution. Different effects contributing to the overall noise factor have been identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139543
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 46
    Electronic Resource
    Electronic Resource
    Removal of phototubes from Pb–glass detectors (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 143-144 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple procedure is described for removing faulty photomultiplier tubes from Pb–glass detectors by means of heated chloroform.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139547
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 47
    Electronic Resource
    Electronic Resource
    Timed source of slow protons (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 146-147 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Alpha particle bombardment of a Si surface-barrier detector in vacuum causes the release of several species of ions from the contaminant layer on the detector surface. The mass-to-charge ratios of the ions are determined by time-of-flight spectroscopy. A significant fraction of the ions are H+ with a yield of 4×10−5 H+ per alpha particle and an emission energy of less than 70 eV. This ion source could be useful for testing slow μ+ collection optics and possibly for studying the diffusion of H atoms in liquid He.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139549
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 48
    Electronic Resource
    Electronic Resource
    Magnetic energy analyzer with a microchannel plate calibrated using cellulose nitrate film (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 20-25 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A time-resolved measurement of an impulsive ion source has been carried out by developing a detector consisting of a magnetic energy analyzer and a microchannel plate (MCP) with multianodes. A method to calibrate the electron multiplication factor of the MCP for charged particles using a solid-state nuclear track detector (SSNTD) is presented. The method has been successfully used for the energy analysis of the deuteron beam produced by the plasma focus. The method is applicable not only for deuterons but also for any other energetic charged particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139560
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 49
    Electronic Resource
    Electronic Resource
    Electron-impact ionization time-of-flight mass spectrometer for molecular beams (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 32-37 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A method is described for performing electron-impact ionization time-of-flight mass spectrometry in a molecular beam apparatus. It provides a convenient means for optimizing the performance of pulsed or continuous nozzle sources and can be used in conjunction with laser excitation. Mass spectra are produced either as analog waveforms or in a high repetition rate ion counting mode. The device can also be operated as a fast ionization gauge for time-resolved detection of pulsed beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139562
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 50
    Electronic Resource
    Electronic Resource
    Dynamic piezoelectric translation devices (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 54-57 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The principle of inertial sliding of a platform on a periodically accelerated support is exploited for the design of a piezoelectric fine-positioning device. The device provides step sizes of 0.04–0.2 μ, speeds of up to 0.2 mm/s, and practically unlimited translation range. It is powered by a sawtooth electric waveform of 60–300-V amplitude and useable for loads of up to 1 kg and probably even more. Mechanical parts and driver electronics are extremely simple, reliable, and easy to operate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139566
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 51
    Electronic Resource
    Electronic Resource
    Optically coupled electrical sampling system with 4-GHz bandwidth (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 60-68 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new approach to the design of a fiber-optic interface that links a commercial sampling head to its matching time-domain reflectometer (TDR)/sampler oscilloscope plug-in unit is reported. Three fiber-optic links replace the wired signal paths of the original design that convey the vertical error signal, the feedback signal, and the horizontal sampling command signal between the sampling head and the oscilloscope sampling plug-in. The dielectric fiber pigtails allow the use of the sampling head inside objects that need to be electromagnetically insulated from the instrumentation system. Low-frequency analog links are used to convey the error and feedback signals. The sampling command signal is conveyed via a link where a powerful, fast-rise infrared laser pulse is generated. The laser pulse is used to trigger an avalanche transistor in the strobe generator circuit of the sampling head by directly coupling the optical energy to the transistor chip. This direct method of detection minimizes the time jitter introduced to the strobe signal, resulting in a bandwidth of 4 GHz. Some of the results of the tests which were carried out on the system are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139514
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 52
    Electronic Resource
    Electronic Resource
    Molecular luminescence cryothermometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 69-74 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A thermometer is described which employs luminescence emitting molecular sensors to measure temperatures in the cryogenic range below 20 K. Upon photoexcitation, the molecular sensor emits luminescence from an excited spin state having two optically resolved sublevels. The sublevels are in thermal equilibrium due to rapid spin-lattice relaxation and thus act as a two-level radiator whose relative luminescence intensities vary with temperature according to the Boltzmann population equation. A device is described which employs photon-counting techniques to measure the intensity ratio of the luminescence originating from these two levels and then uses this ratio to calculate the temperature of the sensor and thereby of its surroundings. The device employs remote fiber-optic sensing and is independent of fluctuations in the excitation source or in the detection system efficiency since it monitors the intensity ratio of two emission bands. Since this temperature measurement technique is based on photophysical and thermodynamic properties of a well-defined system, the molecular sensors employed need not be individually calibrated, only the response curve of the device needs to be determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139515
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 53
    Electronic Resource
    Electronic Resource
    Flat-plate radiometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 86-88 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A thermocouple-type radiometer is constructed by mounting a blackened thin-foil heat-flux sensor on a reflective heat-sink block. Either the sensor alone or the completed assembly is calibrated in a thermal conductivity apparatus. The device measures total hemispheric radiation and is estimated to be accurate to within 2%. Simplicity and ruggedness make the radiometer well suited for measuring output of radiant heaters in hostile factory environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139520
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 54
    Electronic Resource
    Electronic Resource
    Simple method to generate combined luminance and chromaticity differences at threshold levels (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 134-136 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We developed a rapid and simple measuring system for contrast thresholds for a human observer, based on simultaneously presenting eight negative, different contrasts against a uniform background on a screen. This experimental method allows: (1) a continuous variation of the presented contrasts and (2) generation of very small chromaticity differences parallel to the luminance differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139542
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 55
    Electronic Resource
    Electronic Resource
    Improved rectangular cavity for EPR in TE102 mode (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 133-134 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Usually the side walls of a rectangular cavity are less than one skin depth thick at the field-modulation frequency. Eddy current creates an opposing magnetic field to the incoming modulation field, which tends to reduce the field at the center of the cavity. Moreover if the walls of the cavity are kept thin, interaction of eddy currents and the static magnetic field will create mechanical vibrations that will modulate the microwave frequency, thus generating spurious signals at the output of the amplifier. In this note a cavity for X band (in 9–10 GHz) is described in which the above problems have been overcome by corrugating the cavity walls in a precise manner. In comparison with a thin sidewall, the EMF that drives the eddy currents remains unchanged, but because the resistance increases, the eddy currents decrease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139541
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 56
    Electronic Resource
    Electronic Resource
    Compact, movable Faraday cup for intense electron beam pulses (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 140-142 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A compact, axially movable Faraday cup of low noise level was devised for measuring an intense electron beam of a duration time of 10 ns or less, with a replaceable aperture to limit incident electron beams in diameter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139545
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 57
    Electronic Resource
    Electronic Resource
    Interface for data exchange between a parallel and the IEEE-488 bus (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 144-146 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Low-cost talker and listener interfaces between the IEEE-488 bus and a BCD instrument parallel data bus are described. The circuits do not employ any microprocessor at all. Their versatile handshake lines enable simple connection to numerous devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139548
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 58
    Electronic Resource
    Electronic Resource
    Plasma-materials interactions test facility (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 17-19 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Plasma-Materials Interactions Test Facility (PMITF) recently designed and constructed at Oak Ridge National Laboratory (ORNL) is an electron cyclotron resonance microwave plasma system with densities around 1011cm−3 and electron temperatures of 10–20 eV. The device consists of a mirror cell with high-field-side microwave injection and a heating power of up to 0.8 kW (cw) at 2.45 GHz. The facility will be used for studies of plasma-materials interactions and of particle physics in pump limiters and for development and testing of plasma edge diagnostics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139558
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 59
    Electronic Resource
    Electronic Resource
    Versatile, disturbance-free, electromagnetically driven, supersonic beam source (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 26-31 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A nozzle valve having a programmable opening time has been realized and tested. Its working principle differs from those used before in similar devices. In a preliminary version, the valve has been shown to be able to deliver gas pulses having a rise time of about 45 μs and a variable time length from 250 μs (FWHM) to continuum. It can also be operated as a beam chopper with frequency in the range 0–270 Hz and a variable duty factor. The valve does not generate either rf disturbances or appreciable current spikes in the ground network. It is a simple construction device and does not require a critical setup.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139561
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 60
    Electronic Resource
    Electronic Resource
    Reply to "Comments on ‘Improved algorithm for the discrete Fourier transform' '' [Rev. Sci. Instrum. 58, 714 (1987)] (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 715-715 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The difference between Sorella and Ghosh's approach [Rev. Sci. Instrum. 55, 1348 (1984)] and ours [M. Froeyen and L. Hellemans, Rev. Sci. Instrum. 56, 2325 (1985)] to obtain an expression for the Fourier transform of discrete data is highlighted. A practical advantage of our algorithm over Sorella's is stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139623
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 61
    Electronic Resource
    Electronic Resource
    Computer-controlled Cauchois-type x-ray spectrometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 374-378 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A laboratory x-ray spectrometer designed for routine analysis in the 15–60-keV spectral range is described. It consists of a 40-cm bent-crystal transmission spectrometer in the Cauchois geometry, controlled by a microcomputer. The choice of the crystal analyzer and of the detection system is discussed. The instrument is well suited for large spectral range x-ray absorption and emission spectroscopy (XAS, XES) and x-ray source diagnostics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139291
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 62
    Electronic Resource
    Electronic Resource
    Cryogenically cooled K-band high electron mobility transistor receiver for radio astronomical observation (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 379-382 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A K-band receiver using cooled high-electron mobility-transistor (HEMT) amplifiers was developed at the Nobeyama Radio Observatory (NRO). Remarkable reduction of receiver noise temperature Trec was obtained when it was cooled down to cryogenic temperature. The lowest Trec of 75 K was obtained at 23.4 GHz. This low noise characteristic reveals that the cooled HEMT amplifier is promising as a sensitive receiver for radio astronomical observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139292
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 63
    Electronic Resource
    Electronic Resource
    Langmuir trough with four movable barriers (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 428-435 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new type Langmuir trough has been constructed, in which a monolayer on water is enclosed by four polytetrafluoroethylene (PTFE) tapes, independently movable, floating on the water. This arrangement allows a uniform film compression and a study of the stress inhomogeneity under purely compressional or shear strain. The system does not require a delicate water level adjustment. It is capable of sustaining a high surface pressure and easy to operate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139249
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 64
    Electronic Resource
    Electronic Resource
    NMR in a diamond anvil cell (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 415-417 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Techniques are presented for NMR measurements at high pressure in a diamond anvil cell. Two schemes of coupling radio frequency magnetic fields to the spins inside a metal gasket are described. As a demonstration of the techniques, the relaxation times T1 and T2 of methanol:ethanol solution have been measured to 52 kbar at room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139246
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 65
    Electronic Resource
    Electronic Resource
    Improved circuit design for electrostatic self-resonating vibroscopes (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 436-440 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this paper a new circuit design for automatic electrostatic vibroscopes is presented. Previously, the component which stabilized the self-oscillatory motion of the filament in the feedback loop of electrostatic vibroscopes was a negative temperature coefficient thermistor. In the present system this device is replaced with a programmable analog compander. This modification represents an improvement because response time is faster, the steady-state conditions are more stable, and the overall performance of the vibroscope is less susceptible to errors caused by changes in environmental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139250
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 66
    Electronic Resource
    Electronic Resource
    Carbon composition resistors for cryogenic thermometry (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 441-443 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Preparation of thermometers from carbon composition resistors to avoid large changes during repeated thermal cycling is discussed. Furthermore, it is found that the expression 1/(T)1/2 =A+B ln(R−R0)+C ln2(R−R0)+D ln3(R−!iR0) R−R0) provides a very good description of the thermometer temperature T as a function of device resistance R. Fitting accuracies of δT〈1 mK at cryogenic temperatures are achieved. The value of R0 can be chosen so that the residual errors are not more than 10 K even up to room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139251
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 67
    Electronic Resource
    Electronic Resource
    Modular software-controlled electrochemical system (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 468-474 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A modular microcomputer-controlled three-electrode potentiostat configured with graphics is presented. The system is designed for metallic surface characterization and is capable of performing in different modes of operation including single sweep voltammetry, cyclic voltammetry, and chronoamperometry. An integrated and flexible software system for control, data taking, data storage, and transfer is described. Data analysis software for the IBM-PC computer including two- and three-dimensional plotting as well as menu-driven theoretical modeling, simulation, and curvefitting has been developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139255
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 68
    Electronic Resource
    Electronic Resource
    Automatic Langmuir probe plasma diagnostic (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 475-476 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The hardware implementation of a computer-based Langmuir probe technique is described. The technique, which is applicable in a wide range of dc plasma conditions, allows a full range of plasma parameters to be measured efficiently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139256
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 69
    Electronic Resource
    Electronic Resource
    Shock tube powder dispersal unit (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 476-478 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple device for producing a dusty gas at the end wall of a shock tube prior to the arrival of the test shock wave has been produced and tested. It is readily adapted to existing equipment, with minimal modifications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139257
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 70
    Electronic Resource
    Electronic Resource
    Interferometer micrometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 478-479 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A device is described for coupling a micrometer to a Michelson interferometer, which allows determination of the thickness of an opaque plate to usual machine shop accuracy and the uniformity of thickness to within a wavelength of light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139258
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 71
    Electronic Resource
    Electronic Resource
    Ultrahigh-vacuum linear-rotary transfer mechanism utilizing a bakable self-lubricating bearing (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 479-481 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An in vacuo translational-rotational motion based on a ball bearing package is described. Lubrication is accomplished by making the ball retainer from a solid dry lubricant, boron nitride (BN). This eliminates the need to separately coat the balls with lubricant prior to assembly; however, the balls are continuously coated while the bearing is in use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139653
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 72
    Electronic Resource
    Electronic Resource
    Space-resolved determination of electron temperature from x-ray continuum radiation (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 481-482 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A method to obtain the electron temperature Te in plasmas from the chordal measurement of x-ray continuum radiation is described. The maximum value of Te along the line of observation can be derived from the slope of ln E1/2I vs E plot, where I is the chordal x-ray intensity and E is photon energy. The method is applied to obtain the value of Te from the soft x-ray measurement on ST tokamak.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139259
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 73
    Electronic Resource
    Electronic Resource
    Erratum: Development of standard operating procedures for differential scanning calorimeters [Rev. Sci. Instrum. 57, 2584 (1986)] (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 483-483 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139668
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 74
    Electronic Resource
    Electronic Resource
    New simultaneous thermogravimetry and modulated molecular beam mass spectrometry apparatus for quantitative thermal decomposition studies (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 451-461 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new type of instrument has been designed and constructed to measure quantitatively the gas phase species evolving during thermal decompositions. These measurements can be used for understanding the kinetics of thermal decomposition, determining the heats of formation and vaporization of high-temperature materials, and analyzing sample contaminants. The new design allows measurements to be made on the same time scale as the rates of the reactions being studied, provides a universal detection technique to study a wide range of compounds, gives quantitative measurements of decomposition products, and minimizes interference from the instrument on the measurements. The instrument design is based on a unique combination of thermogravimetric analysis (TGA), differential thermal analysis (DTA), and modulated beam mass spectroscopy (MBMS) which are brought together into a symbiotic relationship through the use of differentially pumped vacuum systems, modulated molecular beam techniques, and computer control and data-acquisition systems. A data analysis technique that calculates partial pressures in the reaction cell from the simultaneous microbalance force measurements and the modulated mass spectrometry measurements has been developed. This eliminates the need to know the ionization cross section, the ion dissociation channels, the quadrupole transmission, and the ion detector sensitivity for each thermal decomposition product prior to quantifying the mass spectral data. The operation of the instrument and the data analysis technique are illustrated with the thermal decomposition of contaminants from a precipitated palladium powder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139253
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 75
    Electronic Resource
    Electronic Resource
    Large format imaging photon detector for astronomical spectroscopy (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 167-173 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe the design and development of a large format 40-mm active diameter imaging photon detector. The design comprises an S20 semitransparent photocathode proximity focused onto a stack of two microchannel plates clamped back to back having channel length to diameter ratios of 80:1. Event readout is facilitated by a circular arc terminated resistive anode. The theoretical performance of the design is discussed with reference to gain measurements of the microchannel plates. Experimental results give an optimum position resolution of 100 μm which is spatially nonuniform and degrades towards the edge of the imaging field. We discuss the role of signal processing in this nonuniformity and describe design modifications which would achieve optimum imaging performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139302
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 76
    Electronic Resource
    Electronic Resource
    Optical multichannel analyzer-based high-resolution, multipoint spectroscopic apparatus (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 253-260 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A high-wavelength resolution (Δλ≤0.02 A(ring)) spectroscopic apparatus has been developed and applied to the measurements of spectral line profiles emitted by thermonuclear plasmas yielding important plasma parameters, such as ion temperature and fluid velocity. The experimental apparatus consists of a spectrometer, an optical multichannel analyzer (OMA), and a lens. It allows precise wavelength measurements (Δλerror≤0.02 A(ring)) when a computer and a ThI electrodeless discharge lamp (EDL) are used to calibrate the instrument. The apparatus yields single-shot space and time-resolved spectra for radiation in the 2000–8000-A(ring) range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139317
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 77
    Electronic Resource
    Electronic Resource
    Adjustable speed and vibration-free hydraulic system for Langmuir–Blodgett films deposition (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 285-288 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Conventional apparatus for the dipping and raising of slides usually uses an electric motor with the slides fixed in a rigid holder. Most of the devices create a great deal of vibrations and this produces a nonuniform film deposition. We have used a new apparatus, which does not produce any vibrations of the slide, to build up Langmuir–Blodgett films. To move the slide, we employ a column of water and use the siphon principle, with speeds that can be varied between 3.0 and 120.0 mm min−1. An electronic circuit controls the automatic dipping and raising of the slide. A relay switches the solenoid valve to move the piston in the opposite direction. A machined Teflon trough and antivibration mount are used for the monolayer preparation. With this method, the deposition ratio usually obtained for the cadmium arachidate and chlorophyll a is 1.00±0.05. The absorption spectrum of multilayers of chlorophyll a give a linear relation between the absorbance at 680 nm and the number of layers up to 10. The nonlinear relation for the number of layers higher than 10 is explained by the presence of aggregates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139323
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 78
    Electronic Resource
    Electronic Resource
    Combined mu-metal and niobium superconductor shielding for dc SQUID operation (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 311-312 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this note, we report the use of a combined mu-metal and niobium superconductor shielding which results in much improved dc SQUID operation. The configuration is suitable for large experiments and is much cheaper than the mu-metal shielding conventionally used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139278
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 79
    Electronic Resource
    Electronic Resource
    Channel electron multiplier compatibility with Viton and Apiezon-L vacuum grease (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2331-2332 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Clean Viton and Viton coated with Apiezon-L vacuum grease were tested for their noncontaminating compatibility with channel electron multipliers (CEMs). The test setup and procedure were the same as those used previously in conjunction with CEM compatibility tests of certain epoxies, solder, and fluorocarbon polymer materials useful for construction of spaceflight sensors. While some CEM gain degradation was noted during exposure to Viton and Apiezon-L, the present tests indicate that, at least over instrument lifetimes of ∼2×1012 counts, these materials should be suitable for (1) preflight space sensor testing systems, (2) hermetic seals for CEM-based space sensors, and (3) terrestrial CEM-based instrumentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139346
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 80
    Electronic Resource
    Electronic Resource
    Rotating sample holder for ESR studies of relatively high conductivity, thin samples (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2332-2334 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have designed a low-loss dielectric sample holder for positioning very thin, metallic, semiconductor samples in a TE102 cavity for ESR studies at liquid-helium temperatures. The sample holder can be rotated ±15° from the center position, allowing accurate positioning of the high-conductivity sample at minimum electric field. This results in maximizing the Q factor and allowing symmetric excitation on both faces of the sample. We have also devised a method of setting the microwave phase to desired value to better than 0.3° by utilizing the hyperfine lines of a dilute As-doped Si sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139347
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 81
    Electronic Resource
    Electronic Resource
    Automation of liquid 4He transfer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2341-2342 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The easy-made automation of the liquid 4He transfer is reported. This automation needs little modification of the present system. We only added the liquid 4He levelmeter and two electromagnetic valves to the conventional liquid 4He transfer equipment. The automation saves much time in charging liquid 4He. The performance is satisfactory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139299
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 82
    Electronic Resource
    Electronic Resource
    Photographic filter for equalizing spectral output of light sources used with optical multichannel analyzers (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2342-2344 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A probe light source with uniform spectral output is required to obtain constant signal-to-noise ratio in absorption spectra taken with an optical multichannel analyzer. Suitable filters to balance the spectrum of the flash-lamp source discussed here are unavailable. Instead a device is proposed which equalizes the spectrum of the probe source after it has been dispersed by the spectrograph of the optical multichannel analyzer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139300
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 83
    Electronic Resource
    Electronic Resource
    Inexpensive stepping motor control system (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2346-2346 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An easily programmable stepping motor control is based on an IBM-PC compatible parallel printer interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139301
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 84
    Electronic Resource
    Electronic Resource
    Erratum: Response of a Fabry–Perot cavity to phase modulated light [Rev. Sci. Instrum. 58, 1406 (1987)] (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2345-2345 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139669
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 85
    Electronic Resource
    Electronic Resource
    Differential polarization microscope using an image dissector camera and phase-lock detection (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1987-1995 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A polarization modulation microscope designed to detect and spatially resolve the distribution of optically anisotropic domains in microscopic objects is described. An image dissector camera is used as the detection device. The polarization of the light is modulated by means of a photoelastic modulator and a synchronous demodulation amplifier (lock-in) is utilized to obtain the difference image between the images formed using two orthogonal forms of the incident polarization on the sample. Preliminary results are described for the linear dichroism imaging measurements of polymerized hemoglobin (HbS) in red blood sickle cells. The present limitations of this design are discussed along with various strategies to improve its performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139505
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 86
    Electronic Resource
    Electronic Resource
    Rapid scanning fluorescence spectroscopy using an acousto-optic tunable filter (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1996-2003 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new method for rapidly acquiring fluorescence spectra from optical probes using an acousto-optic tunable filter (AOTF) has been developed. The AOTF consists of a piezoelectric transducer bonded to a birefringent crystal. Acoustic waves are generated in the crystal by an applied radio frequency. For a given radio frequency, only a narrow band of optical frequencies will be diffracted. Unlike normal Bragg diffraction which can only be used with collimated light, the AOTF has a large angular aperture (up to 28 deg) and can therefore be coupled to an uncollimated broadband white light source, photomultiplier tube, or camera. Using the device and a xenon–mercury arc lamp, excitation and emission spectra of the fluorescent pH probe BCECF were acquired in 17 ms (spectral resolution=4 nm). Rapid wavelength switching or modulation of selected wavelengths was achieved at ∼105 Hz. The device is also capable of spectral imaging with a spatial resolution of greater than 100 lines/mm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139506
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 87
    Electronic Resource
    Electronic Resource
    Scanning tunneling microscope (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2010-2017 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article describes the design of a scanning tunneling microscope (STM) which is suitable for surface science work. Various concepts in mechanical structure and electronic circuitry of the STM have been pursued to optimize its performance. This STM has been designed especially to meet the requirement of in situ sample preparation and sample transfer in ultrahigh vacuum. The electronics of this STM are capable of taking simultaneous images with opposite polarities of tunneling voltages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139508
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 88
    Electronic Resource
    Electronic Resource
    Photopyroelectric thin-film instrumentation and impulse-response detection. Part I: A theoretical model (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 2018-2023 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Thin-film pyroelectric effect detectors provide a simple means of measuring thermal properties of solid samples. The present work reports a time-delay theoretical model of thin-film pyroelectric detection which enables the recovery of thermal diffusivity and thermal conductivity information from the impulse response of the pyroelectric system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139509
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 89
    Electronic Resource
    Electronic Resource
    Simplified homodyne small-angle scattering technique which uses a diffraction pattern as local oscillator (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1572-1575 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A CO2 laser small-angle scattering experiment has been set up and used for the investigation of plasma density fluctuations in a magnetized plasma. The local oscillator reference beam for homodyne mixing is produced by diffraction from a thin tungsten wire which lies in the main probe beam near the scattering center. The diffraction wire produces a diffraction pattern covering the scattering plane. An angular adjustment of one single mirror in the outgoing probe beam permits easy alignment of different scattering angles and scattering directions. Rayleigh scattering of ultrasonic waves has been used for testing and calibrating the scattering system. First results from plasma measurements are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139403
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 90
    Electronic Resource
    Electronic Resource
    Improved time-of-flight ion charge state diagnostic (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1589-1592 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A time-of-flight diagnostic for analysis of relatively low-energy ion beams is described. The system incorporates several novel features which improve its performance in a number of ways. The technique is simple and can provide an alternative to magnetic analysis of ion beams for the determination of ion charge state and beam composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139405
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 91
    Electronic Resource
    Electronic Resource
    Frequency tripling into the 720–1025-A(ring) region with pulsed free jets (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1616-1620 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed a coherent source of XUV light, which is continuously tunable between 904 and 1024 A(ring), and line tunable to 720 A(ring). It employs the technique of frequency tripling in a pulsed free jet of gas, and requires a single tunable laser system. Spectra of the relative XUV output vs wavelength in the 904–1024-A(ring) range are presented for the tripling gases Ar, Kr, Xe, CO, and N2. Also listed are relative outputs obtained by tripling at resonantly enhanced lines between 720 and 900 A(ring) in Kr, Xe, and CO. Possible improvements to the source are discussed, and examples of its application are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139356
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 92
    Electronic Resource
    Electronic Resource
    Two-dimensional laser-induced fluorescence-detection system for measurements of number density profiles of seed alkali atoms in MHD combustion gas plasmas (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1632-1637 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A thermally assisted laser-induced fluorescence (LIF) detection system is developed to measure two-dimensional spatial profiles of number density of alkali atoms seeded in an open-cycle MHD generator, especially in the boundary layer on channel electrodes. The spatial resolution of this system is evaluated to be 1.3 mm. To assess the system, the LIF intensity from Na atoms used as a seed tracer is measured in a laminar air-acetylene flame. The detected spatial profiles of the intensity show good agreement with those of the number density of sodium atoms measured by the spectral line absorption method. The LIF intensity near the surface of a cooled metal piece placed in the acetylene flame is also measured with this system as a preliminary experiment for applying it to the boundary layer on MHD channel electrodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139360
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 93
    Electronic Resource
    Electronic Resource
    Fiber-linked interferometric pressure sensor (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1655-1659 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A fiber-optic pressure sensor is described which uses a diaphragm to modulate the mirror separation of a Fabry–Perot cavity (the sensing cavity). A multimode optical fiber delivers broadband light to the sensing cavity and returns the spectrally modulated light which the cavity reflects. The sensor's output spectrum is analyzed using a tunable Fabry–Perot cavity (the reference cavity) to determine the mismatch in the mirror separations of the two cavities. An electronic servo control uses this result to cause the mirror separation of the reference cavity to equal that of the sensing cavity. The displacement of the pressure-sensing diaphragm is then obtained by measuring the capacitance of the reference cavity's metal-coated mirrors. Relative to other fiber-optic sensors, an important advantage of this instrument is its high immunity to the effects of variations in both the transmissivity of the fiber link and the wavelength of the optical source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139363
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 94
    Electronic Resource
    Electronic Resource
    Fiber optics for Raman scattering at low temperatures and high-magnetic fields (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1672-1674 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A versatile and compact fiber-optic system for Raman scattering and photoluminescence is described. This optical fiber system was used for inelastic light-scattering experiments at temperatures down to T=0.35 K and dc magnetic fields to B=30 T. We believe this is the first observation of Raman scattering in either of these environments, both of which are normally inaccessible with optical Dewars. The portable head has a 1-cm o.d. and permits measurements longitudinal and transverse to the applied magnetic field. Observation of spin-flip Raman scattering from donor bound magnetic polarons in (Cd, Mn)Se demonstrates this system at the extremes of both magnetic field and temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139366
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 95
    Electronic Resource
    Electronic Resource
    Acousto-optic spectrum analyzer for plasma diagnostics (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1387-1392 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An acousto-optic rf spectrometer (AOS) has been designed and constructed for use on the CONSTANCE B and TARA mirror experiments at MIT. The AOS is an analog preprocessor of data that can come from a variety of sources, including rf probes and microwave/laser scattering experiments. The output of the AOS is the Fourier transform amplitude of the input in a parallel format suitable for computer acquisition. The spectrometer, having a bandwidth of 500 MHz and a resolution of 1 MHz, together with its receiver, is capable of looking at fluctuations anywhere in the frequency range of a few MHz up to 4 GHz. Power levels of a few nanowatts can be detected. Complete 500-MHz-wide spectra can be processed and acquired at the rate of 1 every 10 μs. The optical components, receiver, and data-acquisition interface will be discussed, and initial data taken on the CONSTANCE B experiment will be shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139419
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 96
    Electronic Resource
    Electronic Resource
    Response of a Fabry–Perot cavity to phase modulated light (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1406-1412 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We present a solution to the lock-in detection method which is valid for arbitrary values of the modulation frequency. Our solutions agree with the results of the quasistatic theory, in the limit of small modulation frequency compared to the resonance linewidth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139422
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 97
    Electronic Resource
    Electronic Resource
    Pellet injection on the ZT-40M reversed field pinch (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1401-1405 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The four barrel pneumatic pellet injector originally used on the Alcator C tokamak at MIT has been reconfigured for use on the ZT-40M reversed field pinch (RFP) at Los Alamos National Laboratory. The lower temperature and density in this device require operation at velocities significantly lower than on Alcator. Allowing a 2-s warmup prior to firing the injector has enabled operation with pressures as low as 40 psig and velocities ranging as low as 200 m/s with H2 pellets, without major cryostat modification. Initial injection experiments in the ZT-40M plasma have verified that pellet refueling is effective for density control, but the net particle inventory increase is less than might be expected based on simple models. Indications of nonoptimal penetration and curvature of the pellet trajectory, in addition to comparable time scales for particle confinement and pellet transit, may account for this.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139421
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 98
    Electronic Resource
    Electronic Resource
    Temperature variable long path cell for absorption measurements (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1427-1428 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A long path cell has been designed and constructed for absorption measurements at temperatures ranging from 215 to 470 K and at pressures from vacuum to 10 atm. It enables us to measure temperature and pressure dependence of the spectra and reaction rates of gases of atmospheric interest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139426
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 99
    Electronic Resource
    Electronic Resource
    Compact pressure cell for light-scattering experiments (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1422-1426 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design and construction of a unique and precision pressure cell suitable for use in light-scattering experiments has been described. The cell has been adapted to allow scattering experiments from liquid samples. The optics of the cell has been especially designed to obtain a higher signal-to-noise ratio. The cell has been designed to be small and compact with sample volume ∼40 mm3. However, it still has a large heat capacity (∼250 J/K) which ensures easy and stable temperature control of the sample. The cell can sustain hydrostatic pressure up to 1000 bar and temperature up to 150 °C. When operated in the constant temperature and pressure mode it offers long-time (∼16 h) temperature and pressure stability of ±2 mK and ±0.05%, respectively, in this entire range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139425
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 100
    Electronic Resource
    Electronic Resource
    Quantitative microfluorometry of isolated living cells with pulsed excitation: Development of an effective and relatively inexpensive instrument (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1433-1438 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Using a computer interfaced original apparatus, we can analyze the fluorescence decay time of a single living cell. This apparatus can measure rate constants in the range of one to few hundred nanoseconds. The smallest sample analyzed was 5×5×5 μm. We obtained enough sensitivity to measure the fluorescence of about 105 molecules of benzo(a)pyrene with a signal/noise ratio equal to 5. The signal was then defined with 300 points and experiment was 60 s long with a laser pulse frequency equal to 100 Hz. Distortions were less than 3% of the signal. Different kinds of information became accessible: statistical comparison on cellular populations and variation with time of studied parameters. As an example of applications, the intrinsic cell fluorescence has been analyzed in order to determine the amounts of bound and free NAD(P)H in single living cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139428
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...