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Magnetic ramp scale at supercritical perpendicular collisionless shocks: Fullparticle electromagnetic simulations
Zhongwei Yang; Quanming Lu; Xinliang Gao; Can Huang; Huigen Yang; Ying Liu; Hongqiao Hu; Desheng Han; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationPhysics of Plasmas
2013
Volume20Pages:092116
ISSN1070-664X
Language英语
AbstractSupercritical perpendicular collisionless shocks are known to exhibit foot, ramp, and overshoot structures. The shock ramp structure is in a smaller scale in contrast to other microstructures (foot and overshoot) within the shock front. One-dimensional full particle simulations of strictly perpendicular shocks over wide ranges of ion beta bi, Alfv en Mach number MA, and ion-to-electron mass ratio mi/me are presented to investigate the impact of plasma parameters on the shock ramp scale. Main results are (1) the ramp scale can be as small as several electron inertial length. (2) The simulations suggest that in a regime below the critical ion beta value, the shock front undergoes a periodic self-reformation and the shock ramp scale is time-varying. At higher ion beta values, the shock front self-reformation is smeared. At still higher ion beta value, the motion of reflected ions is quite diffuse so that they can lead to a quasi-steady shock ramp. Throughout the above three conditions, the shock ramp thickness increases with bi. (3) The increase (decrease) in Mach number and the decrease (increase) in the beta value have almost equivalent impact on the state (i.e., stationary or nonstationary) of the shock ramp. Both of front and ramp thicknesses are increased with MA.VC 2013 AIP Publishing LLC.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1513
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Zhongwei Yang,Quanming Lu,Xinliang Gao,et al. Magnetic ramp scale at supercritical perpendicular collisionless shocks: Fullparticle electromagnetic simulations[J]. Physics of Plasmas,2013,20:092116.
APA Zhongwei Yang.,Quanming Lu.,Xinliang Gao.,Can Huang.,Huigen Yang.,...&北京8701信箱.(2013).Magnetic ramp scale at supercritical perpendicular collisionless shocks: Fullparticle electromagnetic simulations.Physics of Plasmas,20,092116.
MLA Zhongwei Yang,et al."Magnetic ramp scale at supercritical perpendicular collisionless shocks: Fullparticle electromagnetic simulations".Physics of Plasmas 20(2013):092116.
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