Document detail
ID
oai:arXiv.org:2409.03174
Topic
Physics - Space Physics Astrophysics - Solar and Stellar A... Physics - Plasma PhysicsAuthor
Guo, Ao Lu, Quanming Lu, San Yang, Zhongwei Gao, XinliangCategory
sciences: astrophysics
Year
2024
listing date
9/11/2024
Keywords
low-plasma-beta shock quasi-perpendicular acceleration drift physicsAbstract
Shock drift acceleration plays an important role in generating high-energy electrons at quasi-perpendicular shocks, but its efficiency in low beta plasmas is questionable.
In this article, we perform a two-dimensional particle-in-cell simulation of a low-Mach-number low-plasma-beta quasi-perpendicular shock, and find that the electron cyclotron drift instability is unstable at the leading edge of the shock foot, which is excited by the relative drift between the shock-reflected ions and the incident electrons.
The electrostatic waves triggered by the electron cyclotron drift instability can scatter and heat the incident electrons, which facilitates them to escape from the shock's loss cone.
These electrons are then reflected by the shock and energized by shock drift acceleration.
In this way, the acceleration efficiency of shock drift acceleration at low-plasma-beta quasi-perpendicular shocks is highly enhanced.
Guo, Ao,Lu, Quanming,Lu, San,Yang, Zhongwei,Gao, Xinliang, 2024, Electron shock drift acceleration at a low-Mach-number, low-plasma-beta quasi-perpendicular shock
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