中国物理B ›› 2023, Vol. 32 ›› Issue (5): 54101-054101.doi: 10.1088/1674-1056/acb911

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Particle-in-cell simulations of low-β magnetic reconnection driven by laser interaction with a capacitor-coil target

Xiaoxia Yuan(原晓霞)1, Cangtao Zhou(周沧涛)1,†, Hua Zhang(张华)1,‡, Ran Li(李然)1, Yongli Ping(平永利)2, and Jiayong Zhong(仲佳勇)2   

  1. 1 Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China;
    2 Department of Astronomy, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2022-12-22 修回日期:2023-01-28 接受日期:2023-02-04 出版日期:2023-04-21 发布日期:2023-05-05
  • 通讯作者: Cangtao Zhou, Hua Zhang E-mail:zhoucangtao@sztu.edu.cn;zhanghua@sztu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11875092).

Particle-in-cell simulations of low-β magnetic reconnection driven by laser interaction with a capacitor-coil target

Xiaoxia Yuan(原晓霞)1, Cangtao Zhou(周沧涛)1,†, Hua Zhang(张华)1,‡, Ran Li(李然)1, Yongli Ping(平永利)2, and Jiayong Zhong(仲佳勇)2   

  1. 1 Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China;
    2 Department of Astronomy, Beijing Normal University, Beijing 100875, China
  • Received:2022-12-22 Revised:2023-01-28 Accepted:2023-02-04 Online:2023-04-21 Published:2023-05-05
  • Contact: Cangtao Zhou, Hua Zhang E-mail:zhoucangtao@sztu.edu.cn;zhanghua@sztu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11875092).

摘要: The dynamics of low-β magnetic reconnection (MR) driven by laser interaction with a capacitor-coil target are reexamined by simulations in this paper. We compare two cases MR and non-MR (also referred as AP-case and P-case standing for the anti-parallel and parallel magnetic field lines, respectively) to distinguish the different characteristics between them. We find that only in the AP-case the reconnection electric field shows up around the X line and the electron jet is directed toward the X line. The quadruple magnetic fields exist in both cases, however, they distribute in the current sheet area in the AP-case, and out of the squeezing area in the P-case, because electrons are demagnetized in the electron diffusion region in the MR process, which is absent in the P-case. The electron acceleration is dominant by the Fermi-like mechanism before the MR process, and by the reconnection electric field when the MR occurs. A power-law electron energy spectrum with an index of 1.8 is found in the AP-case. This work proves the significant potential of this experimental platform to be applied in the studies of low-β astronomy phenomena.

关键词: magnetic reconnection, intense laser, low-β plasma

Abstract: The dynamics of low-β magnetic reconnection (MR) driven by laser interaction with a capacitor-coil target are reexamined by simulations in this paper. We compare two cases MR and non-MR (also referred as AP-case and P-case standing for the anti-parallel and parallel magnetic field lines, respectively) to distinguish the different characteristics between them. We find that only in the AP-case the reconnection electric field shows up around the X line and the electron jet is directed toward the X line. The quadruple magnetic fields exist in both cases, however, they distribute in the current sheet area in the AP-case, and out of the squeezing area in the P-case, because electrons are demagnetized in the electron diffusion region in the MR process, which is absent in the P-case. The electron acceleration is dominant by the Fermi-like mechanism before the MR process, and by the reconnection electric field when the MR occurs. A power-law electron energy spectrum with an index of 1.8 is found in the AP-case. This work proves the significant potential of this experimental platform to be applied in the studies of low-β astronomy phenomena.

Key words: magnetic reconnection, intense laser, low-β plasma

中图分类号:  (Laser-driven acceleration?)

  • 41.75.Jv
94.30.cp (Magnetic reconnection)