中国物理B ›› 2017, Vol. 26 ›› Issue (5): 54206-054206.doi: 10.1088/1674-1056/26/5/054206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Application of multi-pulse optical imaging to measure evolution of laser-produced counter-streaming flows

Dawei Yuan(袁大伟), Yutong Li(李玉同), Baojun Zhu(朱保君), Yanfei Li(李彦霏), Jiayong Zhong(仲佳勇), Huigang Wei(魏会冈), Chang Liu(刘畅), Xiaoxia Yuan(原晓霞), Zhe Zhang(张喆), Guiyun Liang(梁贵云), Feilu Wang(王菲鹿), Fang Li(李芳), Jiarui Zhao(赵家瑞), Neng Hua(华能), Baoqiang Zhu(朱宝强), Jianqiang Zhu(朱健强), Shaoen Jiang(江少恩), Kai Du(杜凯), Yongkun Ding(丁永坤), Gang Zhao(赵刚), Jie Zhang(张杰)   

  1. 1 Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    2 National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 School of Physical Sciences, University of Chinese Academy of Sciences, Bejing 100049, China;
    4 Department of Astronomy, Beijing Normal University, Beijing 100875, China;
    5 National Laboratory on High Power Lasers and Physics, Shanghai 201800, China;
    6 Research Center for Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;
    7 Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    8 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiaotong University, Shanghai 200240, China
  • 收稿日期:2016-11-04 修回日期:2016-12-06 出版日期:2017-05-05 发布日期:2017-05-05
  • 通讯作者: Yutong Li, Gang Zhao, Jie Zhang E-mail:ytli@iphy.ac.cn;gzhao@bao.ac.cn;jzhang1@sjtu.edu.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2013 CBA01501/3), the National Natural Science Foundation of China (Grant Nos. 11503041, 11135012, 11375262, 11573040, 11574390, and 11220101002), and China Postdoctoral Science Foundation (Grant No. 2015M571124).

Application of multi-pulse optical imaging to measure evolution of laser-produced counter-streaming flows

Dawei Yuan(袁大伟)1, Yutong Li(李玉同)2,3,8, Baojun Zhu(朱保君)2, Yanfei Li(李彦霏)2, Jiayong Zhong(仲佳勇)4,8, Huigang Wei(魏会冈)1, Chang Liu(刘畅)4, Xiaoxia Yuan(原晓霞)4, Zhe Zhang(张喆)2, Guiyun Liang(梁贵云)1, Feilu Wang(王菲鹿)1, Fang Li(李芳)2, Jiarui Zhao(赵家瑞)2, Neng Hua(华能)5, Baoqiang Zhu(朱宝强)5, Jianqiang Zhu(朱健强)5, Shaoen Jiang(江少恩)6, Kai Du(杜凯)6, Yongkun Ding(丁永坤)6, Gang Zhao(赵刚)1, Jie Zhang(张杰)7,8   

  1. 1 Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    2 National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 School of Physical Sciences, University of Chinese Academy of Sciences, Bejing 100049, China;
    4 Department of Astronomy, Beijing Normal University, Beijing 100875, China;
    5 National Laboratory on High Power Lasers and Physics, Shanghai 201800, China;
    6 Research Center for Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;
    7 Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    8 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2016-11-04 Revised:2016-12-06 Online:2017-05-05 Published:2017-05-05
  • Contact: Yutong Li, Gang Zhao, Jie Zhang E-mail:ytli@iphy.ac.cn;gzhao@bao.ac.cn;jzhang1@sjtu.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2013 CBA01501/3), the National Natural Science Foundation of China (Grant Nos. 11503041, 11135012, 11375262, 11573040, 11574390, and 11220101002), and China Postdoctoral Science Foundation (Grant No. 2015M571124).

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摘要：

A counter-streaming flow system is a test-bed to investigate the astrophysical collisionless shock (CS) formation in the laboratory. Electrostatic/electromagnetic instabilities, competitively growing in the system and exciting the CS formation, are sensitive to the flows parameters. One of the most important parameters is the velocity, determining what kind of instability contributes to the shock formation. Here we successfully measure the evolution of the counter-streaming flows within one shot using a multi-pulses imaging diagnostic technique. With the technique, the average velocity of the high-density-part (ne≥ 8-9×1019 cm-3) of the flow is directly measured to be of ～ 106 cm/s between 7 ns and 17 ns. Meanwhile, the average velocity of the low-density-part (ne ≤ 2×1019 cm-3) can be estimated as ～ 107 cm/s. The experimental results show that a collisionless shock is formed during the low-density-part of the flow interacting with each other.

关键词: collisionless shock, electrostatic/electromagnetic instabilities, imaging diagnostic technique

Abstract:

A counter-streaming flow system is a test-bed to investigate the astrophysical collisionless shock (CS) formation in the laboratory. Electrostatic/electromagnetic instabilities, competitively growing in the system and exciting the CS formation, are sensitive to the flows parameters. One of the most important parameters is the velocity, determining what kind of instability contributes to the shock formation. Here we successfully measure the evolution of the counter-streaming flows within one shot using a multi-pulses imaging diagnostic technique. With the technique, the average velocity of the high-density-part (ne≥ 8-9×1019 cm-3) of the flow is directly measured to be of ～ 106 cm/s between 7 ns and 17 ns. Meanwhile, the average velocity of the low-density-part (ne ≤ 2×1019 cm-3) can be estimated as ～ 107 cm/s. The experimental results show that a collisionless shock is formed during the low-density-part of the flow interacting with each other.

Key words: collisionless shock, electrostatic/electromagnetic instabilities, imaging diagnostic technique

中图分类号:  (Imaging and optical processing)

  • 42.30.-d
47.80.Jk (Flow visualization and imaging) 52.35.Tc (Shock waves and discontinuities) 52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves))