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Generation and characterization of millimeter-scale plasmas for the research of laser plasma interactions on Shenguang-Ⅲ prototype

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【作者】李志超；郑坚；丁永坤；尹强；蒋小华；李三伟；郭亮；杨冬；王哲斌；章欢；刘永刚；詹夏宇；唐琦；

【Author】 Li Zhi-Chao a)b),Zheng Jian a),Ding Yong-Kun b),Yin Qiang b),Jiang Xiao-Hua b),Li San-Wei b),Guo Liang a)b),Yang Dong b),Wang Zhe-Bin b),Zhang Huan b),Liu Yong-Gang b),Zhan Xia-Yu b),and Tang Qi b) a) CAS Key Laboratory of Basic Plasma Physics,and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China b) Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China

【机构】 CAS Key Laboratory of Basic Plasma Physics,and Department of Modern Physics,University of Science and Technology of China； Research Center of Laser Fusion,China Academy of Engineering Physics；

【摘要】 In order to produce millimeter-scale plasmas for the research of laser-plasma interactions(LPIs),gasbag target is designed and tested on Shenguang-Ⅲ prototype laser facility.The x-ray pinhole images show that millimeter-scale plasmas are produced with the gasbag.The electron temperature inferred from the stimulated Raman scattering(SRS) spectrum is about 1.6 keV.The SRS spectrum also indicates that the electron density has a flat region within the duration of 200 ps.The obvious differences between the results of the gasbag and that of the void half hohlraum show the feasibility of the gasbag target in creating millimeter-scale plasmas.The LPIs in these millimeter-scale plasmas may partially mimic those in the ignition condition because the duration of the existence of a flat plasma density is much larger than the growth time of the two main instabilities,i.e.,SRS and stimulated Brillouin scattering(SBS).So we make the conclusion that the gasbag target can be used to research the large-scale LPIs.更多还原

【Abstract】 In order to produce millimeter-scale plasmas for the research of laser-plasma interactions(LPIs),gasbag target is designed and tested on Shenguang-Ⅲ prototype laser facility.The x-ray pinhole images show that millimeter-scale plasmas are produced with the gasbag.The electron temperature inferred from the stimulated Raman scattering(SRS) spectrum is about 1.6 keV.The SRS spectrum also indicates that the electron density has a flat region within the duration of 200 ps.The obvious differences between the results of the gasbag and that of the void half hohlraum show the feasibility of the gasbag target in creating millimeter-scale plasmas.The LPIs in these millimeter-scale plasmas may partially mimic those in the ignition condition because the duration of the existence of a flat plasma density is much larger than the growth time of the two main instabilities,i.e.,SRS and stimulated Brillouin scattering(SBS).So we make the conclusion that the gasbag target can be used to research the large-scale LPIs.更多还原

【关键词】 gasbag target； large scale； laser plasma interaction； stimulated Raman scattering；
【Key words】 gasbag target； large scale； laser plasma interaction； stimulated Raman scattering；

【基金】 Project supported by the National Natural Science Foundation of China (Grant No. 10625523);the Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-YW-N36);National High-Tech Program of China

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2010年12期

【分类号】TL612
【被引频次】1
【下载频次】13

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