Energy spectrum and pitch angle distribution of particles reflected by MHD shock waves of fast mode

Details Energy spectrum and pitch angle distribution of particles reflected by MHD shock waves of fast mode Energy spectrum and pitch angle distribution of particles reflected by MHD shock waves of fast mode

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..193t&link_type=abstract

Planetary and Space Science, vol. 27, Feb. 1979, p. 193-201.

Computer Science

52

Angular Distribution, Energy Spectra, Magnetohydrodynamic Waves, Particle Interactions, Shock Wave Interaction, Adiabatic Conditions, Magnetic Mirrors, Particle Acceleration

Scientific paper

In order to study the macroscopic acceleration process for nonthermal particles at the front of MHD shock waves, two limiting treatments, namely the 'adiabatic' and the 'kink' treatments, have been developed. They correspond to cases of particle gyroradius/width of shock transition region ratios much less and much greater than unity, respectively. The effects of the acceleration process on energy and pitch angle distributions of reflected particles are examined by using each of these treatments and results are compared. It is shown that these two treatments give almost the same energy and pitch angle distribution in the case of nearly-perpendicular shock waves. In the case of nearly-parallel shock waves, the pitch angle distributions differ significantly, there being reflected particles in the adiabatic loss cone when the kink treatment is employed, while the ranges of the energy distribution for these two treatments do not differ greatly.

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