A High-Efficiency X-Ray Crystal Spectrometer for X-Ray Thomson Scattering  

作　　者：张小丁 张继彦 杨国洪 韦敏习 胡广月 赵斌 郑坚 

机构地区：[1]CAS Key Laboratory of Basic Plasma Physics and Department of Modern Physics,University of Science and Technology of China [2]Laser Fusion Research Center,Chinese Academy of Engineering Physics

出　　处：《Plasma Science and Technology》2013年第8期755-759,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11175197);CAS Innovative Project of China(KJCX2-YW-N36);Ministry of Education of China(IRT1190)

摘　　要：Highly oriented pyrolitic graphite （HOPG） has high X-ray diffraction efficiency due to its unique mosaic crystal structure, and thus is very suitable for its application to X-ray Thomson scattering measurement of solid-density plasmas. In this article, by using the K-shell X-ray source from laser-produced Ti plasma, the properties of the HOPG spectrometer are characterized and compared with those of the flat Pentaerythritol （PET） spectrometer. The results show that the diffraction efficiency of the HOPG spectrometer under focusing condition is an order higher than that of the PET spectrometer, while the spectral resolution of the HOPG is about 320, high enough to be used in the measurement of X-ray Thomson scattering spectra.Highly oriented pyrolitic graphite （HOPG） has high X-ray diffraction efficiency due to its unique mosaic crystal structure, and thus is very suitable for its application to X-ray Thomson scattering measurement of solid-density plasmas. In this article, by using the K-shell X-ray source from laser-produced Ti plasma, the properties of the HOPG spectrometer are characterized and compared with those of the flat Pentaerythritol （PET） spectrometer. The results show that the diffraction efficiency of the HOPG spectrometer under focusing condition is an order higher than that of the PET spectrometer, while the spectral resolution of the HOPG is about 320, high enough to be used in the measurement of X-ray Thomson scattering spectra.

关 键 词：crystal spectrometer highly oriented pyrolytic graphite X-ray Thomson scattering 

分 类 号：TL817[核科学技术—核技术及应用]