神光Ⅱ装置直接驱动柱形靶压缩  

Direct-drive cylindrical target compression at Shenguang-Ⅱ laser facility

作　　者：王伟[1] 方智恒[1] 贾果[1] 王瑞荣[1] 安红海[1] 谢志勇[1] 叶君建[1] 周华珍[1] 王琛[1] 吴江[1] 雷安乐[1] 傅思祖[1] 

机构地区：[1]中国工程物理研究院上海激光等离子体研究所,上海201800

出　　处：《强激光与粒子束》2013年第9期2303-2306,共4页High Power Laser and Particle Beams

摘　　要：在神光Ⅱ激光装置上,针对外径260μm的柱形靶,采用大焦斑拼接的办法(焦斑直径约200μm),开展了八路激光直接驱动压缩实验。利用第九路激光驱动钼X射线背光,使用Kirkpatrick-Baez显微镜成像以及条纹相机记录的方法,获得了柱形靶内爆流线图,据此给出的压缩后密度约为初始密度的120倍。该密度处于快点火电子产生区和能量沉积区密度之间,正是电子束需要传输的密度区域。神光Ⅱ皮秒激光运行后,可以利用这种压缩的柱形靶开展电子束在稠密等离子体中传输的实验研究。An experiment of direct-drive cylindrical target compression is carried out using the eight laser beams of Shenguang-Ⅱ laser facility with the spots defocused to 200 μm.A clear flow diagram of cylindrical target implosion is obtained with Mo backlight driven by the 9th laser beam and Kirkpatrick-Baez microscopy.Experimental result shows that,for the cylindrical target with an outer diameter of 260 μm,a compressed density of up to 120 times the initial density is obtained,which is between the densities of electron production area and energy deposition area.Experiments of electron beam transport and energy deposition in this compressed cylindrical target could be carried out once the Shenguang-Ⅱ ps laser beam is available.

关 键 词：柱形靶 压缩 直接驱动 电子传输 快点火 

分 类 号：O532.13[理学—等离子体物理]