强激光与粒子束, 2013, 25 (2): 385, 网络出版: 2013-01-07   

再发射技术测量SGⅡ黑腔靶早期对称性

Reemission technique for early time, hohlraum radiation symmetry measurements on SGⅡ facility
作者单位
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
摘要
利用再发射技术能够有效测量早期辐射驱动对称性。2011年在神光Ⅱ激光装置上,采用Bi替代靶,通过改变靶丸的支撑方式和优化探测器配置,利用分幅相机获得较高信噪比的Bi球表面再发射图像。利用实验结果获得了入射流不对称性P2分量随时间的变化,对比两种腔长的黑腔,P2分量随时间的变化存在明显差别。两种腔P2分量随时间的变化趋势与采用视角因子模拟的结果基本一致。
Abstract
Indirectly driven capsule implosions are driven by four shock waves whose strength and relative timing must be controlled to high precision to keep the fuel on a low adiabat. The symmetry during the first 2 ns should be tuned carefully. The mainline tuning targets chosen are the high Z reemission spheres. For record of instantaneous asymmetry during the first 2 ns, multiple images in the time of the soft Xray reemission from a nonimploding Bi ball on SGⅡ facility were taken in 2011. The reemitted images with hohlraum lengths of 1350 μm and 1500 μm were obtained and the experimental P2/P0 and P4/P0 time histories were deduced. A simple analytical viewfactor model is established, and the simulation result of P2/P0 is in agreement with the measured P2/P0.
参考文献

[1] Delamater N D, Magelssen G R, Hauer A A. Reemission technique for symmetry measurements in hohlraum targets containing a centered highZ ball[J]. Phys Rev E, 1996, 53:52405248.

[2] Magelssen G R, Delamater N D, Lindman E L, et al. Measurements of early time radiation asymmetry in vacuum and methanefilled hohlraums with the reemission ball technique[J]. Phys Rev E, 1998, 57:46634672.

[3] Landen O L, Edwards J, Haan S W, et al. Capsule implosion optimization during the indirectdrive National Ignition Campaign[J]. Phys Plasmas, 2011, 18:051002.

[4] Tsakiris G D. Energy redistribution in cavities by thermal radiation[J]. Phys Fluids B, 1992, 4:9921005.

[5] Srivastava M K, Kumar V, Menon S V G. Analytical axial view factors and thermal radiation distribution inside a cylindrical hohlraum[J]. Phys Plasmas, 2000, 7:26162621.

[6] Sigel R, Howell J R. Thermal radiation: heat transfer[M]. Washington: Hemishere Publishing Corporation, 1982.

[7] Caruso A. 1988 inertial confinement fusion, proceedings of course and workshop[M]. Varenna Eritrice Compositori Bologna,1988:139.

[8] Nakamuraa M, Kondoa K, Nishimuraa H. Numerical method for finding uniform irradiation conditions of a fusion capsule driven by Xray radiation[J]. Laser and Particle Beams, 1992, 10:421433.

陈伯伦, 蒋炜, 景龙飞, 袁铮, 黎航, 余波, 蒲昱东, 苏明, 晏骥, 黄天晅, 江少恩, 刘慎业, 杨家敏, 丁永坤. 再发射技术测量SGⅡ黑腔靶早期对称性[J]. 强激光与粒子束, 2013, 25(2): 385. Chen Bolun, Jiang Wei, Jing Longfei, Yuan Zheng, Li Hang, Yu Bo, Pu Yudong, Su Ming, Yan Ji, Huang Tianxuan, Jiang Shaoen, Liu Shenye, Yang Jiamin, Ding Yongkun. Reemission technique for early time, hohlraum radiation symmetry measurements on SGⅡ facility[J]. High Power Laser and Particle Beams, 2013, 25(2): 385.

本文已被 9 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!