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  • 1
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    Relaxation of magnetotail plasmas with field-aligned currents (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Equilibria of low free energy have been constructed for magnetotail plasmas (Bhattacharjee, 1987). This model is extended to obtain axisymmetric states which have the structure of flux ropes containing field-aligned currents. An interesting feature of these equilibria is a chain of magnetic islands along the tail axis. Theoretical results are compared with observations from ISEE 1 and ISEE 2 on flux ropes (Elphic et al., 1986).
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 479-484
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Ballooning stability of axisymmetric plasmas with sheared equilibrium flows (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A WKB theory is formulated for large-n ballooning modes in axisymmetric, toroidal plasmas with sheared equilibrium flows. The validity of the standard ballooning respresentation is severely restricted in the presence of sheared toroidal flow, despite the fact that to leading order in (1/n), where n is the azimuthal number, the eigenmode equation contains only derivatives along a field line. Necessary and sufficient conditions for stability are obtained in a high-beta ordering for rigid toroidal rotation as well as field-aligned flows.
    Keywords: PLASMA PHYSICS
    Type: Physics of Fluids B (ISSN 0899-8221); 1; 2207-221
    Format: text
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    NASA TECHNICAL REPORTS
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