Abstract
We report on the results of hybrid simulation of diffusive shock acceleration of ions with different charge-to-mass ratios in quasi-parallel collisionless shocks. We consider a hydrogen medium with dynamically insignificant admixtures of helium and carbon ions in various charge states. Spatial regions of applicability of the Bohm approximation as well as the quasi-linear diffusion theory are determined. The possibility of nondiffusive propagation in regions far ahead of the shock is considered.
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ACKNOWLEDGMENTS
The authors are grateful to the Tornado Computer Complex at the St. Petersburg Polytechnic University for providing the opportunity of resource-consuming computations.
Funding
The work of J.A.K., S.M.O., V.E.E., and V.I.R. was supported by the Russian Foundation for Basic Research (project no. 18-32-00158).
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Translated by N. Wadhwa
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Kropotina, J.A., Bykov, A.M., Osipov, S.M. et al. Simulation of Accelerated Particle Diffusion in Collisionless Shocks with an Admixture of Heavier-than-Hydrogen Ions. Tech. Phys. 65, 14–21 (2020). https://doi.org/10.1134/S1063784220010144
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DOI: https://doi.org/10.1134/S1063784220010144