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  • 1985-1989  (3)
  • 1989  (3)
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  • 1985-1989  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Theoretical modeling of drift cyclotron loss-cone instability mode structures (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 570-580 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements of the drift cyclotron loss-cone instability mode structure have recently been performed on MIX [Phys. Fluids 29, 3439 (1986)], an axisymmetric mirror machine characterized by a small width Maxwellian cold stream and a larger width loss-cone plasma. To model these measurements the Fourier-space integral equation was solved, derived from the linearized Vlasov equation for electrostatic perturbations, with both a matrix version technique and a WKB approximation. It is found that the mode is prohibited from the cold stream region by the process of mode conversion, which explains experimental results quite well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859117
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Collisionless electron temperature gradient-driven instability in field-reversed configurations (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 2181-2185 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The collisionless electron temperature gradient-driven instability is studied in the parameter regime relevant for field-reversed configurations. Perturbations in the electrostatic potential and all three components of the vector potential are considered and fully magnetized models, which include finite beta orbit modifications, are used for electrons and ions. It is shown that the electron temperature gradient can drive unstable modes over a wide range of values of β and ηe. These modes require a finite (but small) kz and propagate in the direction opposite to the lower hybrid drift.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859031
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stabilization of lower hybrid drift modes by finite parallel wavenumber and electron temperature gradients in field-reversed configurations (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 1654-1658 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of finite parallel wavenumber and electron temperature gradients on the lower hybrid drift instability is studied in the parameter regime corresponding to the TRX-2 device [Fusion Technol. 9, 48 (1986)]. Perturbations in the electrostatic potential and all three components of the vector potential are considered and finite beta electron orbit modifications are included. The electron temperature gradient decreases the growth rate of the instability but, for kz=0, unstable modes exist for ηe(=T'en0/Ten0)〉6. Since finite kz effects completely stabilize the mode at small values of kz/ky((approximately-equal-to)5×10−3), magnetic shear could be responsible for stabilizing the lower hybrid drift instability in field-reversed configurations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.858943
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    Paper (German National Licenses)
    Fulltext
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