Alpha particle heating in hot diamagnetic cavities

Details Alpha particle heating in hot diamagnetic cavities Alpha particle heating in hot diamagnetic cavities

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9511975g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 1, 1990, p. 11975-11982. Research sponsored by DOE.

Astronomy and Astrophysics

Astronomy

4

Alpha Particles, Ion Scattering, Magnetohydrodynamic Stability, Plasma Composition, Solar Wind, Spaceborne Astronomy, Computerized Simulation, Diamagnetism, International Sun Earth Explorers, Solar Protons

Scientific paper

Observational data from ISEE 1 are analyzed and a one-dimensional electromagnetic hybrid computer simulation is conducted for the heating of solar wind alpha particles in hot diamagnetic cavities (HDCs). In the simulation, which envisions alpha heating by ion-ion instabilities, low beam densities excite the proton/proton right-hand resonant instability that then pitch-angle scatters the beam without significantly heating the alphas. At greater beam densities, the proton/proton nonresonant instability undergoes saturation through a trapping of all three ion components. These results support the Thomsen et al. (1988) hypothesis that the nonresonant instability is the primary source of ion heating in hot diamagnetic cavities.

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