用于等离子体诊断的新型X射线谱仪  

A novel X-ray spectrometer for plasmas diagnosis

作　　者：施军[1] 刘锋[1] 杨祖华[2] 钱凤[2] 曹磊锋 SHI Jun LIU Feng YANG Zu-hua QIAN Feng CAO Lei-feng(The Key Laboratory of Optoelectronic Technology and System, Ministry of Education, Chongqing University, Chongqing 400044, China Research Center of Laser Fusion, China Academy of Engineering, Mianyang 621900, China)

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《光电子．激光》2017年第3期238-242,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(11075226);重庆市基础与前沿研究计划(cstc2014jcyjA90010)资助项目

摘　　要：为了诊断热核聚变等离子体状态,研制了用于热斑区等离子体诊断用的新型X射线谱仪,能够同时探测X射线光谱与聚爆靶图像信息。光谱检测功能由4块椭圆晶体分析器实现,分别覆盖2~20keV能带范围不同能带的X射;图像检测功能由分幅相机匹配小孔阵列成像完成,理想状态能够得到20幅不同时间的聚爆靶图像。在中物院"神光-Ⅱ"升级装置上进行了打靶实验,获取了X射线光谱与聚爆靶图像信号。分析了光谱及图像信息,并针对光谱仪漏光问题改进了谱仪结构。在神光-Ⅲ原型装置上进行了验证实验,获得比较理想的图像信号,信噪比(SNR)数据达到30。A novel X-ray spectrometer is designed to diagnose the plasma conditions. It can provide simul- taneously X-ray spectroscopy and plasma image information. Four eUiptically bent crystal analyzers are used to detect the X-ray spectroscopy in the range of 2-20 keV. The pinhole imaging systems coupled with gated micro-channel plate （MCP） detectors are developed to detect the image,and it allows 20 ima- ges to be collected in a single experiment. The experiments are conducted to demonstrate the utility of the spectrometer at ＂Shenguang-Ⅱ＂ upgrading laser facility in China Academy of Engineering Physics. The X-ray spectroscopy and hot sport image information are obtained by the spectrometer, and the pro- posed scheme can improve the capability of the spectrometer. Finally, experiments are done at ＂Shen- guang- Ⅲ＇laser facility,the ideal images are obtained,and the signal-to-noise ratio can raach 30.

关 键 词：等离子体 光谱仪 椭圆晶体 X射线光谱 成像 

分 类 号：O536[理学—等离子体物理]