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Ion acceleration processes at reforming collisionless shocks
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UNSPECIFIED (2005) Ion acceleration processes at reforming collisionless shocks. PHYSICS OF PLASMAS, 12 (1). -. doi:10.1063/1.1812536 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.1812536
Abstract
The identification of preacceleration mechanisms for cosmic ray ions in supernova remnant shocks is an important problem in astrophysics. Recent particle-in-cell (PIC) shock simulations have shown that inclusion of the full electron kinetics yields non-time-stationary solutions, in contrast to previous hybrid (kinetic ions, fluid electrons) simulations. Here, by running a PIC code at high phase space resolution, ion acceleration mechanisms associated with the time dependence of a supercritical collisionless perpendicular shock are examined. In particular, the components of integralF(.)vdt are analyzed along trajectories for ions that reach both high and low energies. Selection mechanisms for the ions that reach high energies are also examined. In contrast to quasistationary shock solutions, the suprathermal protons are selected from the background population on the basis of the time at which they arrive at the shock, and thus are generated in bursts. (C) 2005 American Institute of Physics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICS OF PLASMAS | ||||
Publisher: | AMER INST PHYSICS | ||||
ISSN: | 1070-664X | ||||
Official Date: | January 2005 | ||||
Dates: |
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Volume: | 12 | ||||
Number: | 1 | ||||
Number of Pages: | 8 | ||||
Page Range: | - | ||||
DOI: | 10.1063/1.1812536 | ||||
Publication Status: | Published |
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