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  • Artikel  (4.352)
  • Physics  (4.268)
  • microwaves
  • Wiley-Blackwell  (4.340)
  • Springer  (12)
  • American Chemical Society
  • Molecular Diversity Preservation International
  • Physik  (4.352)
  • 1
    Digitale Medien
    Digitale Medien
    Video detection of microwaves using high-T c Y-Ba-Cu-O thin films (1992)
    Springer
    Journal of superconductivity 5 (1992), S. 29-32 
    Details
    ISSN: 1572-9605
    Schlagwort(e): High-T c films ; microwaves ; videodetection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract Microwave video detection (demodulation) studies were carried out on high-T c thin films at 64 K. The amplitudes of the video detection signal varies linearly with incident microwave power. The microwave response shows a peak at an optimum bias current. The shape analysis of the demodulated signal indicates the nonbolometric nature of the detector.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00617993
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  • 2
    Digitale Medien
    Digitale Medien
    The Electrodynamics of a Superconducting (or Lossy Dielectric) Film on a Metallic Substrate (1998)
    Springer
    Journal of superconductivity 11 (1998), S. 775-784 
    Details
    ISSN: 1572-9605
    Schlagwort(e): Superconductor ; thin film ; microwaves ; 2 layers ; electrodynamics ; metallic substrate ; PACS numbers: 74.76. − w, 77.55. + f, 74.80. Fp, 72.10.Fk
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract Analytic expressions for the electrodynamics of TEM radiation normally incident upon a superconducting film-metallic substrate system are derived in the good conductor approximation. These expressions include the fields, surface impedance, and power dissipation in both the superconducting (or lossy dielectric) film and the metallic substrate. The sum of the power dissipating in the film and in the substrate--in the continuum approximation and in the steady-state limit--is shown to be in agreement with over 30 significant figures with an independent calculation that also employs the good conductor approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1022605509923
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  • 3
    Digitale Medien
    Digitale Medien
    Pulse radar reflectometry for fusion plasma diagnostics (1993)
    Springer
    International journal of infrared and millimeter waves 14 (1993), S. 1755-1768 
    Details
    ISSN: 1572-9559
    Schlagwort(e): pulse-radar ; reflectometry ; microwaves ; plasma diagnostics ; tokamak
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A basic principle of pulse radar reflectometry is considered in this paper. A numerical analysis is performed in order to study errors appearing due to the expansion of a microwave pulse reflected from the plasma. A block diagram of the basic pulse radar scheme and its overall performance is presented. The first experimental results obtained on T11-M tokamak are discussed. An improved pulse radar scheme with cross-detection is considered. The results of bench test experiments and future applications of this scheme are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02101330
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  • 4
    Digitale Medien
    Digitale Medien
    Energy transfer equation for high-harmonic cyclotron maser and peniotron interactions (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 853-858 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; cyclotron maser ; peniotron ; harmonics ; microwaves ; millimeter-waves
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The high-harmonic cyclotron maser and peniotron interactions both appear as special cases of a general gyrotron energy transfer equation derived from the linearized Vlasov equation of motion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01010206
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  • 5
    Digitale Medien
    Digitale Medien
    Detection of lower hybrid waves by coherent scattering of microwaves: Preliminary results in Wega (1981)
    Springer
    International journal of infrared and millimeter waves 2 (1981), S. 713-737 
    Details
    ISSN: 1572-9559
    Schlagwort(e): coherent scattering ; hybrid resonance ; plasma heating ; density fluctuations ; microwaves
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coherent scattering of a microwave beam is considered as a diagnostic tool for monitoring the penetration of the lower hybrid heating waves in a plasma. A set up using a 2 mm wavelength has been installed on the Wega torus. Preliminary experimental data are reported and discussed. The amplitude of the electron density fluctuations has been found lower than the one we expected. The variation of the wave amplitude as the plasma density varies, qualitatively agrees with a cold plasma electromagnetic theory. The feasibility of the measurements was checked and indications of some improvements to be made in the diagnostic method came out. Some important topics (both theoretical and practical) in scattering experiments on L.H. heating waves are reviewed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01007274
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  • 6
    Digitale Medien
    Digitale Medien
    Tuneable millimeter-wave gyrotrons (1982)
    Springer
    International journal of infrared and millimeter waves 3 (1982), S. 725-734 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwave cavities ; microwaves ; electron cyclotron maser
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In the course of developing a low-power, tuneable millimeter-wave source, two gyrotrons have been constructed. Gyrotron I was a fixed-frequency device operating at 120 GHz while Gyrotron II produced more than 20 lines in the frequency range 130 to 260 GHz. The design of tuneable gyrotrons is discussed with reference to the Gyrotron II results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01009730
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  • 7
    Digitale Medien
    Digitale Medien
    The gyrotron energy transfer equation (1983)
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 247-255 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwaves ; electron cyclotron maser
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A gyrotron energy transfer equation for the interaction of an annular electron beam in a right-cylindrical cavity has been derived by a rigorous method similar to the one used by Choe and Ahn to find a gyrotron dispersion equation. This new energy transfer equation makes no assumption about the size of the electron orbits. The importance of various terms is discussed and the expression is applied to a number of interesting special cases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01008605
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  • 8
    Digitale Medien
    Digitale Medien
    Limiting current in gyrotrons (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 103-121 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; microwaves ; millimeter waves ; space charge
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Analytical expression for the space charge limited current is derived on the basis of a simplified model. Numerical data for wide ranging beam and geometrical parameters are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01014037
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  • 9
    Digitale Medien
    Digitale Medien
    Coherent scattering of microwaves by plasma density fluctuations. Application: Observation of lower hybrid waves in wega (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1543-1569 
    Details
    ISSN: 1572-9559
    Schlagwort(e): coherent scattering ; hybrid waves ; plasma heating density fluctuations ; microwaves
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The scattering of 2 mm radiation by the density fluctuation associated with lower hybrid waves is used to localize the injected waves within a cross-section of the plasma. A translating antenna setup scores a region extending from the center of the plasma to the boundary with two fixed scattering angles. The measured amplitudes allow one to determine the local value of certain spectral components of n" in the plasma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01040505
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  • 10
    Digitale Medien
    Digitale Medien
    Application of microwave reflectometry for plasma density diagnostics in a reversed-field pinch machine (1992)
    Springer
    International journal of infrared and millimeter waves 13 (1992), S. 609-624 
    Details
    ISSN: 1572-9559
    Schlagwort(e): wide-band reflectometry ; microwaves ; plasma ; reversed-fieldpinch ; magnetic shear
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The implementation of reflectometry as a means of measuring plasma density is examined in relation to the reversed-field pinch machine. The effects of magnetic shear and density fluctuations are studied. Ray-tracing and simulation results are presented and the proposed reflectometer system for the RFX reversed-field pinch machine is described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01010686
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