高谱分辨X光能谱诊断技术  

High spectral resolution measurement of soft-X-ray spectrum using transmission grating spectrometer

作　　者：杨家敏[1] 丁耀南[1] 郑志坚[1] 王耀梅[1] 张文海[1] 张继彦[1] 洪义麟[2] 徐向东[2] 付绍军[2] 

机构地区：[1]中国工程物理研究院激光聚变研究中心 [2]中国科学技术大学合肥同步辐射实验室,安徽合肥230029

出　　处：《强激光与粒子束》2003年第1期69-72,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题;高温高密度等离子体国家重点实验室基金资助课题

摘　　要：　采用国内首次研制出的2000线/mm的自支撑透射光栅配上背照射软X光CCD(charge coupleddevice)组成了高谱分辨透射光栅谱仪。通过实验标定和理论模型计算相结合得到了高线对透射光栅的绝对衍射效率;同时建立了透射光栅谱仪测谱解谱方法,编制了相应的解谱程序。在"神光"激光装置上利用该谱仪通过激光打靶实验获得了金腔靶注入口发射的X光能谱定量实验结果,实验结果表明,该谱仪测谱范围在高能区达到6000eV,谱分辨达到0.1nm,能够清晰地分辨金等离子体M带三峰分布X光谱结构。High spectral resolution transmission grating spectrometer is established by combining newly manufactured 2 000 l/mm transmission grating with a softXray CCD. Transmission grating efficiencies have been studied experimentally and theoretically in order to obtain quantitative results of measured Xray spectra. Then, a method for unfolding the soft Xray spectrum measured with transmission grating spectrometer is introduced, in which the grating efficiencies, CCD quantum efficiencies and grating higher dispersive order overlapping have been taken into account. The developed quantitative measurement method has been applied to obtain Xray spectrum from laserentered gold cavity on 'ShengguangⅡ' laser facility. 

关 键 词：高谱分辨透射光栅谱仪 软X光能谱 定量测量 等离子体诊断 

分 类 号：TL817.1[核科学技术—核技术及应用] TL65