The long-time evolution of a low-density ion beam

Details The long-time evolution of a low-density ion beam The long-time evolution of a low-density ion beam

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.2443z&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, March 1, 1989, p. 2443-2458. Research supported by Lawrence Livermore

Physics

8

Earth Magnetosphere, Interplanetary Magnetic Fields, Ion Beams, Space Environment Simulation, Algorithms, Computerized Simulation, Dense Plasmas, Hybrid Computers, Ion Density (Concentration), Long Term Effects

Scientific paper

An orbit-averaged hybrid computer simulation code is used to study a cold, fast, low-density ion beam propagating along the ambient magnetic field as it interacts with a much denser fluid background, while the ion beam density is varied relative to the background density; the highest-density simulation thus conducted falls within range of solar wind data. All simulations exhibit a linear linear phase, an intermediate 'trapping' phase, and a late, 'decorrelation' phase, irrespective of relative beam density. In the highest-density simulation, sufficient parallel pressure seems to be at hand to drive a conventional, linearly-polarized firehose mode to local instability.

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