A seven-crystal spectrometer for high-energy resolution X-ray spectroscopy at Shanghai Synchrotron Radiation Facility  

作　　者：Bing-Bao Mei Liang-Xin Wang Song-Qi Gu Xiao-Zhi Su Shuo Zhang Yao Wei Jing-Yuan Ma Zheng Jiang Fei Song 

机构地区：[1]Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201800,China [2]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China [3]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230026,China

出　　处：《Nuclear Science and Techniques》2024年第9期82-91,共10页核技术（英文）

基　　金：supported by the National Key Research and Development Program of China(Nos.2022YFA1503801,2021YFA1600800);the Photon Science Center for Carbon Neutrality of Chinese Academy of Sciences;Shanghai Science and Technology Development Funds(Nos.22YF1454500,23ZR1471400);the CAS Project for Young Scientists in Basic Research(No.YSBR-022);the National Natural Science Foundation of China(No.12305375)。

摘　　要：A Johann-type X-ray spectrometer was successfully developed at the hard X-ray branch(in-vacuum undulator with a 24-mm periodic length)of the energy material beamline(E-line)at the Shanghai Synchrotron Radiation Facility(SSRF).This spectrometer was utilized to implement X-ray emission spectroscopy(XES),high-energy resolution fluorescence-detected X-ray absorption spectroscopy(HERFD-XAS),and resonant inelastic X-ray scattering.Seven spherically bent crystals were positioned on the respective vertical 500-mm-diameter Rowland circles,adopting an area detector to increase the solid angle to 1.75%of 4πsr,facilitating the study of low-concentrate systems under complex reaction conditions.Operated under the atmosphere pressure,the spectrometer covers the energy region from 3.5 to 18 keV,with the Bragg angle ranging from 73°to 86°during vertical scanning.It offers a promised energy resolution of sub-eV(XES)and super-eV(HERFD-XAS).Generally,these comprehensive core-level spectroscopy methods based on hard X-rays at the E-line with an extremely high photon flux can meet the crucial requirements of a green energy strategy.Moreover,they provide substantial support for scientific advances in fundamental research.

关 键 词：X-ray emission spectroscopy High-energy-resolution X-ray spectrometer Johann geometry Energy materials SSRF 

分 类 号：TL817.1[核科学技术—核技术及应用]