Particle acceleration by an ensemble of shocks

Details Particle acceleration by an ensemble of shocks Particle acceleration by an ensemble of shocks

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..251a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 1, May 1990, p. 251-258.

Astronomy and Astrophysics

Astrophysics

29

Charged Particles, Galactic Cosmic Rays, High Energy Interactions, Particle Acceleration, Particle Energy, Shock Wave Interaction, Extragalactic Radio Sources, Magnetohydrodynamics, Stochastic Processes, Supernova Remnants

Scientific paper

The distribution of accelerated particles that results from shock acceleration by a number of identical shocks is presented. It is shown that the effect of acceleration by many identical shocks rather than by one isolated shock can be described by a multiple scattering process. The combined effect of many shock waves on the resulting spectrum of accelerated particles leads to a flattening of the distribution at high energies, and the appearance of particles with momenta below the injection momentum as a result of expansion losses and stochastic acceleration between shocks. Finally, this process is described as a multiple-scattering process involving propagator renormalization.

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