Evolution of diamagnetic cavities in the solar wind

Details Evolution of diamagnetic cavities in the solar wind Evolution of diamagnetic cavities in the solar wind

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9311341t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Oct. 1, 1988, p. 11341-11353. DNA-supported research.

Physics

40

Diamagnetism, Ion Beams, Solar Wind, Space Plasmas, Drift Rate, Field Strength, Ion Density (Concentration), Magnetohydrodynamic Stability, Time Response

Scientific paper

Two-dimensional hybrid (particle ions and fluid electrons) simulations of a finite plasma beam moving through a collisionless plasma parallel to an ambient magnetic field are considered. When the relative drift speed exceeds twice the local Alfven velocity, an electromagnetic ion beam instability is excited which produces an energetic plasma in the interaction region with β larger than unity. This energetic plasma pushes out the magnetic field, creating a diamagnetic cavity auch launching outgoing Alfven waves. Application of the results to recent observations of hot diamagnetic cavities in the solar wind is discussed.

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