Hybrid Simulations of Particle Acceleration at Shocks
Abstract
We present the results of large hybrid (kinetic ions - fluid electrons) simulations of particle acceleration at non-relativistic collisionless shocks. Ion acceleration efficiency and magnetic field amplification are investigated in detail as a function of shock inclination and strength, and compared with predictions of diffusive shock acceleration theory, for shocks with Mach number up to 100. Moreover, we discuss the relative importance of resonant and Bell's instability in the shock precursor, and show that diffusion in the self-generated turbulence can be effectively parametrized as Bohm diffusion in the amplified magnetic field.
Keywords
Cite
@article{arxiv.1410.1644,
title = {Hybrid Simulations of Particle Acceleration at Shocks},
author = {Damiano Caprioli},
journal= {arXiv preprint arXiv:1410.1644},
year = {2015}
}
Comments
9 pages, 10 figures; Proceedings of the conference "Cosmic ray origin: beyond the standard models", San Vito di Cadore (Dolomites, Italy), March 2014. To appear in Nuclear Physics B Proceedings Supplement