| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Observation of Weibel magnetic fields in laser-produced interpenetrating flows |
| Chuanqi Shi(施川奇)1, Dawei Yuan(袁大伟)1,2,†, Wei Sun(孙伟)2,3, Yapeng Zhang(张雅芃)2,4, Zhijie Qiu(邱志杰)5, Huigang Wei(魏会冈)1, Zhe Zhang(张喆)5, Xiaohui Yuan(远晓辉)6, and Gang Zhao(赵刚)1,7,‡ |
1 Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
2 Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China;
3 Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China;
4 School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
5 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
6 Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
7 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China |
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Abstract Weibel instability is a promising candidate mechanism for collisionless shock formation in astrophysical systems. Capturing the underlying physics of Weibel instability will help us to understand the astrophysical shock formation, magnetic field generation and amplification, particle acceleration, and so on. Laboratory astrophysics, provides a new way to study these microphysics in controlled conditions. At Shenguang-II laser facility, the interpenetrating plasma flows are generated by eight laser beams irradiating a pair of opposing foils to mimic the supernova explosion and the ejecta sweeping up the surrounding medium. Evolution of collisionless interpenetrating plasma flows is observed using optical diagnostics. Filamentary structures appear in the interaction region and the associated magnetic strength is measured about 40 T. Theoretical analysis and simulations indicate that these characteristics are induced by nonlinear Weibel instability.
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Received: 01 October 2024
Revised: 14 November 2024
Accepted manuscript online: 20 November 2024
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PACS:
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52.35.-g
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(Waves, oscillations, and instabilities in plasmas and intense beams)
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52.35.Qz
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(Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.))
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52.35.Hr
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(Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))
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| Fund: We thank the staff of the Shengguang-II laser facility. Project supported by the National Key Research and Development Program of China (Grant Nos. 2022YFA1603200 and 2022YFA1603204), the Fund from the Chinese Academy of Sciences Youth Interdisciplinary Team (Grant No. JCTD-2022-05), the Youth Innovation Promotion Association of the Chinese Academy of Sciences, the National Natural Science Foundation of China (Grant Nos. 11873061 and 12473099), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA25030500, XDA25010100, and XDA25030200). |
Corresponding Authors:
Dawei Yuan, Gang Zhao
E-mail: dwyuan@bao.ac.cn;gzhao@nao.cas.cn
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Cite this article:
Chuanqi Shi(施川奇), Dawei Yuan(袁大伟), Wei Sun(孙伟), Yapeng Zhang(张雅芃), Zhijie Qiu(邱志杰), Huigang Wei(魏会冈), Zhe Zhang(张喆), Xiaohui Yuan(远晓辉), and Gang Zhao(赵刚) Observation of Weibel magnetic fields in laser-produced interpenetrating flows 2025 Chin. Phys. B 34 015203
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