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Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 107
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
P
article pre-acceleration constitutes a central unresolved problem for diffusive shock acceleration process assumed to provide
high-energy cosmic rays in astrophysical plasma environments. Here, we report on recent studies of electron injection at
high Mach-number nonrelativistic perpendicular shocks with application to forward shocks of young supernova remnants. We
use high-resolution large-scale two-dimensional fully kinetic particle-in-cell simulations that sample a representative portion of
the turbulent shock front and account for time-dependent effects of the cyclic shock reformation. We discuss a nonlinear shock
structure and analyse conditions leading to efficient electron heating and pre-acceleration. We confirm electron injection through
shock-surfing acceleration in the foot of high Mach-number shocks and analyse additional electron energization processes due
to spontaneous magnetic reconnection in the filamentary region of the turbulent shock ramp. We demonstrate a non-stationarity
of the injection processes and their dependence on plasma temperature upstream of the shock and also on numerical parameters
assumed in computer simulations. The relevance of our results to the physics of fully three-dimensional systems will also be
discussed.
Jacek.Niemiec@ifj.edu.plElectron injection at nonrelativistic shocks of young
supernova remnants
Jacek Niemiec
1
, Artem Bohdan
2
, Martin Pohl
2, 3
and Oleh Kobzar
1
1
Institute of Nuclear Physics Polish Academy of Sciences (IFJ PAN), Poland
2
Deutsches Elektronen-Synchrotron (DESY), Germany
3
University of Potsdam, Germany
Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-003