激光聚变内爆D^(3)He质子源的在线诊断系统  

Online diagnosis system for D^(3)He proton in laser fusion implosion experiments

作　　者：滕建[1] 邓志刚[1] 单连强[1] 温家星 袁宗强 王为武[1] 张天奎[1] 田超[1] 张锋[1] 于明海 卢峰[1] 洪伟[1] 贺书凯[1] 张智猛[1] 齐伟[1] 崔波[1] 徐秋月 魏来[1] 李颖洁 夏立琼 张兴[1] 吴玉迟[1] 粟敬钦[1] 周维民[1] 谷渝秋[1] Teng Jian;Deng Zhigang;Shan Lianqiang;Wen Jiaxing;Yuan Zongqiang;Wang Weiwu;Zhang Tiankui;Tian Chao;Zhang Feng;Yu Minghai;Lu Feng;Hong Wei;He Shukai;Zhang Zhimeng;Qi Wei;Cui Bo;Xu Qiuyue;Wei Lai;Li Yingjie;Xia Liqiong;Zhang Xing;Wu Yuchi;Su Jingqin;Zhou Weimin;Gu Yuqiu(Science and Technology on Plasma Physics Laboratory,Laser Fusion Research Center,CAEP,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院激光聚变研究中心等离子体物理重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2022年第5期101-105,共5页High Power Laser and Particle Beams

基　　金：国家重点研发计划项目(2017YFA0206001);国家自然科学基金项目(11875048,11775202);等离子体物理重点实验室基金项目(6142A04190102,6142A04210103)。

摘　　要：提出了一种基于混合像素探测器作为记录介质的用于激光聚变内爆D^(3)He质子源能谱和产额测量的在线磁谱仪诊断系统。通过对探测器上特征团簇数目和能量的识别,结合诊断系统排布,可以快速获取激光聚变反应产生的D^(3)He质子源的能谱和产额。在神光装置上对该诊断系统进行了测试。实验使用31束纳秒激光聚焦到靶丸上驱动聚变反应。靶丸内充有原子比1∶1的D_(2)和^(3)He的混合气体。在线磁谱仪诊断系统测量到了中心能量在14.6 MeV、半高全宽为2.1 MeV、产额约(2.3±0.13)×10^(9)的初级D^(3)He质子能谱。该系统的建立可以实时给出D^(3)He质子源能谱和产额信息,从而更加及时地指导实验的开展。An online magnetic spectrometer system based on a hybrid pixel detector is proposed for the diagnosis of the D^(3)He proton spectrum and yield in laser fusion implosion experiments.By identifying the number and energy of the track clusters and considering the experiment setup,the proton spectrum and yield could be deduced in time.The online diagnosis system is tested on the SG laser facility,in which 31 laser beams are focused on the capsule to drive the fusion reaction.With D_(2) and ^(3)He gas mixed 1∶1 by atomic ratio,the primary D^(3)He proton energy spectrum with center energy of 14.6 MeV,FWHM of 2.1 MeV,and yield of 2.3×10^(9) is obtained.This system could provide the D^(3)He proton spectrum and yield online,which would be helpful to improve the experiment in time.

关 键 词：激光聚变 内爆 质子能谱 在线诊断 

分 类 号：O539[理学—等离子体物理]