2024-03-29T10:21:34Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00012322
2023-01-16T03:58:58Z
336:695:696
Numerical studies on ultrarelativistic ion motions in an oblique magnetosonic shock wave
Usami, Shunsuke
Horiuchi, Ritoku
Ohsawa, Yukiharu
open access
Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The motion of ultrarelativistic ions in an oblique magnetosonic shock wave is studied analytically and numerically. The zeroth-order theory predicts that an oblique shock wave can accelerate ions in the direction nearly parallel to the magnetic field if the shock speed is vsh ∼ c cos θ, where θ is the angle between the wave normal and the magnetic field, while the perturbation is a one-dimensional oscillation nearly perpendicular to the zeroth-order motion. The perturbation frequency ω is of the order of Ωi0γ^−1/2, where γ is the Lorentz factor of the zeroth-order velocity. These theoretical predictions are examined with test particle simulations, in which the test particle orbits are calculated with use of the electromagnetic fields of a shock wave obtained from an electromagnetic particle simulation. The zeroth-order and perturbed motions in the simulations are explained by the theory.
American Institute of Physics
2009-12
eng
journal article
VoR
http://hdl.handle.net/2237/14203
https://nagoya.repo.nii.ac.jp/records/12322
https://doi.org/10.1063/1.3270110
1070-664X
PHYSICS OF PLASMAS
16
12
122104
122104
https://nagoya.repo.nii.ac.jp/record/12322/files/physics_of_plasmas_16_12_122104.pdf
application/pdf
308.9 kB
2018-02-20