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Mach number and plasma beta dependence of the ion temperature perpendicular to the external magnetic field in the transition region of perpendicular collisionless shocks

Mach number and plasma beta dependence of the ion temperature perpendicular to the external magnetic field in the transition region of perpendicular collisionless shocks

Authors :
Yamazaki, Ryo
Shinoda, Ayato
Umeda, Takayuki
Matsukiyo, Shuichi
Source :
AIP Advances 9, 125010 (2019)
Publication Year :
2019

Abstract

Ion temperature anisotropy is a common feature for (quasi-)perpendicular collisionless shocks. By using two-dimensional full particle simulations, it is shown, that the ion temperature component perpendicular to the shock magnetic field at the shock foot region is proportional to the square of the Alfven Mach number divided by the plasma beta. This result is also explained by a simple analytical argument, in which the reflected ions get energy from upstream plasma flow. By comparing our analytic and numerical results, it is also confirmed that the fraction of the reflected ions hardly depends on the plasma beta and the Alfven Mach number when the square of the Alfven Mach number divided by the plasma beta is larger than about 20.<br />Comment: 6 pages, 3 figures, 1 table. AIP Advances, in press

Details

Database :
arXiv
Journal :
AIP Advances 9, 125010 (2019)
Publication Type :
Report
Accession number :
edsarx.1911.08263
Document Type :
Working Paper
Full Text :
https://doi.org/10.1063/1.5129067