Kinetic study of transverse electron-scale interface instability in relativistic shear flows

Yao Peilin; Cai Hongbo; Yan Xinxin; Zhang Wenshuai; Du Bao; Tian Jianmin; Zhang Enhao; Wang Xuewu; Zhu Shaoping

doi:10.1063/5.0017962

Volume 5 Issue 5

Sep. 2020

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Yao Peilin, Cai Hongbo, Yan Xinxin, Zhang Wenshuai, Du Bao, Tian Jianmin, Zhang Enhao, Wang Xuewu, Zhu Shaoping. Kinetic study of transverse electron-scale interface instability in relativistic shear flows[J]. Matter and Radiation at Extremes, 2020, 5(5): 054403. doi: 10.1063/5.0017962

Citation:

Yao Peilin, Cai Hongbo, Yan Xinxin, Zhang Wenshuai, Du Bao, Tian Jianmin, Zhang Enhao, Wang Xuewu, Zhu Shaoping. Kinetic study of transverse electron-scale interface instability in relativistic shear flows[J]. Matter and Radiation at Extremes, 2020, 5(5): 054403. doi: 10.1063/5.0017962

Citation:

Yao Peilin, Cai Hongbo, Yan Xinxin, Zhang Wenshuai, Du Bao, Tian Jianmin, Zhang Enhao, Wang Xuewu, Zhu Shaoping. Kinetic study of transverse electron-scale interface instability in relativistic shear flows[J]. Matter and Radiation at Extremes, 2020, 5(5): 054403. doi: 10.1063/5.0017962

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Kinetic study of transverse electron-scale interface instability in relativistic shear flows

doi: 10.1063/5.0017962

Yao Peilin^1
,,
Cai Hongbo^{2, 3
,
,
,},
Yan Xinxin⁴,
Zhang Wenshuai^2
,,
Du Bao^2
,,
Tian Jianmin^5
,,
Zhang Enhao⁵,
Wang Xuewu¹,
Zhu Shaoping^{2
,
,}

1.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
3.
Center for Applied Physics and Technology, HEDPS, and College of Engineering, Peking University, Beijing 100871, China
4.
Center for Applied Physics and Technology, HEDPS, School of Physics, and College of Engineering, Peking University, Beijing 100871, China
5.
Graduate School, China Academy of Engineering Physics, Beijing 100088, China

More Information

Corresponding author: a)Authors to whom correspondence should be addressed: Cai_hongbo@iapcm.ac.cn and Zhu_shaoping@iapcm.ac.cn; a)Authors to whom correspondence should be addressed: Cai_hongbo@iapcm.ac.cn and Zhu_shaoping@iapcm.ac.cn
Received Date: 2020-06-11
Accepted Date: 2020-07-28

Available Online: 2020-09-01

Publish Date: 2020-09-15

Abstract

Abstract

Interfacial magnetic field structures induced by transverse electron-scale shear instability (mushroom instability) are found to be strongly associated with electron and ion dynamics, which in turn will influence the development of the instability itself. We find that high-frequency electron oscillations are excited normal to the shear interface. Also, on a larger time scale, the bulk of the ions are gradually separated under the influence of local magnetic fields, eventually reaching an equilibrium related to the initial shear conditions. We present a theoretical model of this behavior. Such separation on the scale of the electron skin depth will prevent different ions from mixing and will thereafter restrain the growth of higher-order instabilities. We also analyze the role of electron thermal motion in the generation of the magnetic field, and we find an increase in the instability growth rate with increasing plasma temperature. These results have potential for providing a more realistic description of relativistic plasma flows.

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References(28)

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