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  • 1985-1989  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Drift-cyclotron instability with trapped particle effects in a linear multiple mirror (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 2838-2844 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A drift-cyclotron instability is observed at low magnetic field strengths in a linear multiple mirror. It is characterized by a frequency which decreases with increasing magnetic field strength, propagation in the direction of the electron diamagnetic current, and an azimuthal mode number of 2. The mode is observed when the ion-cyclotron frequency is less than the ion diamagnetic frequency. The frequency is Doppler-shifted by an E×B drift. Effects of particles trapped in the mirror cells alter the characteristics of the instability. The frequency decreases slightly and the fluctuation level increases with increasing mirror ratio for mirror ratios less than 1.1, but then levels off at higher mirror ratios. The drift wave is analyzed by a linear theory which treats finite ion gyroradius, an electron temperature gradient, and trapped electrons. The theory predicts three unstable modes, only one of which is consistent with all of the above measurements. This instability is a Doppler-shifted drift-cyclotron instability modified by trapped particle effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865203
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Observations of a low-frequency mode in a linear multiple mirror (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 2302-2304 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two drift waves with similar frequencies are observed to be simultaneously unstable under the same plasma parameters. The modes are distinct below a critical magnetic field strength. By varying the mirror ratio and the magnetic field strength the frequencies of the two modes can be made to coalesce. As the critical magnetic field is exceeded the two modes again separate in frequency, but in addition a large-amplitude, low-frequency (〈1 kHz) flute-type mode is also observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865416
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of an α,β-unsaturated dipeptide, racemic N-[(phenylmethoxy)carbonyl]phenylalanyl-Δ2-phenylalanine (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 1403-1406 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270187091716
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    Paper (German National Licenses)
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