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
  • 1
    Electronic Resource
    Electronic Resource
    Beam generation, acceleration, and extraction on a stellatron accelerator (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 2777-2784 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stellatron accelerator of the University of California at Irvine (UCI) [Phys. Fluids B 2, 3149 (1990)] was modified to accommodate beam extraction. The magnetic field coils were reconstructed to adapt an extraction port. A fiberglass–graphite–epoxy chamber replaced the glass chamber that cracked frequently during the previous experiment. Improvement in the magnetic field configuration has significantly reduced the current loss during acceleration. A 1.1 kA, 12 MeV electron beam was generated by initially forming a 1.2 kA beam with plasma start-up. The beam radius was 5–7 mm. Beam extraction was performed with two auxiliary pulsed current coils and up to 15% of the beam was extracted from the chamber. The extraction process was analyzed by computational orbit simulations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870513
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vacuum desensitization of CR-39 track recording plastic (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3020-3021 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: It has been observed that prolonged (several hours) exposure to vacuum (P〈10−4 Torr) renders CR-39 insensitive to the passage of 5.67 MeV alpha particles. Subsequent exposure to air results in a recovery of sensitivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144595
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    High current density electron beam generation from field emission tip cathodes (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 609-611 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron beams with current up to 1.2 A and current density over 107 A/cm2 have been generated from a pulsed field emission tip cathode etched from commercial grade tungsten wire. Electron beams with current up to 0.8 A have also been generated from a molybdenum tip. Tip radius was 0.1–1 μm. Applied tip voltage was up to 50 kV with pulse duration of 0.3–1.2 μs. Depending on brightness, these types of electron beams could be suitable for channeling radiation x-ray lasers and might considerably decrease the operating wavelength of free-electron lasers at moderate beam energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357055
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    X-ray laser gain from Bragg reflection coupling in channeled relativistic beam systems (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 866-868 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The application of distributed feedback by Bragg reflections in electron beam channeling x-ray lasers is investigated. Expressions for low threshold gain are derived for this cavity mirror structure in single crystals and are shown to have possible application in reducing beam high current requirements by many orders of magnitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99256
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Diffusive processes in the cross-field flow of intense plasma beams (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1874-1879 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We consider magnetic field diffusion in the presence of strongly magnetized electrons (ωceτc 0〉1) as a mechanism for the rapid penetration observed in cross-field flows of high-β plasma beams. The diffusion has been investigated in several cases which are amenable to analytic solution. The flux penetration times are found to be insensitive to the particular configuration. Comparison with two experiments is made. Agreement within the limits of the experiments is found. Both require an anomalous collision rate which is consistent with observed fluctuations in one case but apparently not the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342922
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Coupling of radiation and hydrodynamics in a Z-pinch plasma (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 1939-1945 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The relationship between hydrodynamics and radiative energy loss from a gas puff Z pinch was studied using helium, krypton, and a helium–krypton mixture. The results show that radiation cooling enables the magnetic field to compress the plasma to a higher electron density and a smaller final radius. The data are consistent with a simple model describing the thermalization of the plasma on the axis of the pinch. The spectrum of the krypton radiation from the mixture was harder than from the pure krypton pinch. This may be important for application of the Z pinch as a radiation source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337193
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Ion beam propagation in a transverse magnetic field and in a magnetized plasma (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 73-76 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Propagation of a charge-neutralized ion beam, in a transverse magnetic field (Bz 〈400 G) and in a magnetized plasma, has been studied. Measurements indicate that the beam propagation mechanism is due to the E×B drift in the region of high β (1〈β〈400), where β is the ratio of beam kinetic energy to transverse magnetic field energy. Diamagnetic measurements, both internal and external to the propagating beam, confirm the fast diffusion of Bz into the beam on a time scale much shorter than the beam rise time of 10−7 s. When the beam is injected into a magnetized plasma the electric field is shorted to a degree that increases with increasing background plasma density. When the plasma density reaches 1013/cm3 (∼200×the beam density) complete shorting occurs and the beam is deflected by the transverse magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341222
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Stability enhancement of a low initial density hollow gas-puff z pinch by e− beam preionization (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 1311-1316 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: e− beam preionization of the initial gas column of the hollow gas-puff z pinch at the University of California, Irvine is shown to decrease the amplitude of Rayleigh–Taylor instabilities which disrupt the imploding plasma shell of low initial density (〈1×1017 cm−3) helium pinches. A 5-ns pulsed nitrogen laser Mach–Zehnder interferometer compares the plasma density profile at various times during the implosion for preionized and unpreionized pinches. Also, a B-dot current probe compares the plasma induction fluctuations of the pinched state. Numerical calculations of the effects of the Rayleigh–Taylor growth for our geometry are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338109
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Wide channeling beam x-ray laser (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 40-42 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A channeling beam x-ray laser is proposed which is weakly dependent on the channeling length. The scheme is based on applying Bragg reflections to direct the amplified radiation toward a longitudinal cavity direction which is transverse to the beam propagation. This scheme implements a crystal distributed feedback cavity and is restricted to short radiation wavelength of the order of the crystal unit cell dimension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105571
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Adiabatic beam dynamics in a modified betatron (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 1968-1973 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron beams in modified betatrons were previously analyzed by using a paraxial treatment. This treatment is valid only for a beam where particles have an axial velocity much larger than their perpendicular velocity. However, in accelerators such as the UCI Modified Betatron, the beam does not satisfy the paraxial assumption. Another treatment based on the guiding center equations is presented. In this treatment the paraxial assumption is not necessary. Corrections to the conventional "betatron condition'' are found and compared with recent experiments. Additionally, this treatment can describe nonparaxial quasiconfined particles. The effect of these quasiconfined particles is examined, and it is shown that they provide fields that are necessary to stabilize the beam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865374
    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...