Ni Dong-Dong, Kang Xu, Yan Shuai, Huang Xin-Chao, Xiong Tao, Liang Dong-Xu, Yang Ke, Zhu Lin-Fan
Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.
Rev Sci Instrum. 2018 Aug;89(8):085108. doi: 10.1063/1.5030032.
We report the design, construction, and commissioning of a spectrometer for non-resonant inelastic x-ray scattering study installed at BL15U, Shanghai Synchrotron Radiation Facility. It features a 1-m vertical scattering arm. An energy resolution of 1.3 eV is achieved based on the 1 m Rowland circle and the diced Si(555) crystal analyzer with a fixed Bragg angle of about 88.8°. The inelastic squared form factors of 2S + 2P of helium with respect to the momentum transfer were measured and compared with the accurate and reliable theoretical calculations in order to verify the spectrometer. Furthermore, the spectrometer is designed to work in the momentum transfer region of 0 Å < < 8.68 Å and to initially focus on the non-resonant inelastic x-ray scattering studies on gaseous samples.
我们报告了一台安装在上海同步辐射装置BL15U光束线站的用于非共振非弹性X射线散射研究的光谱仪的设计、建造和调试情况。它具有一个1米长的垂直散射臂。基于1米罗兰圆和具有约88.8°固定布拉格角的切割Si(555)晶体分析仪，实现了1.3电子伏特的能量分辨率。测量了氦的2S + 2P非弹性形状因子平方相对于动量转移的关系，并与精确可靠的理论计算结果进行比较，以验证该光谱仪。此外，该光谱仪设计用于在0 Å < < 8.68 Å的动量转移区域工作，并最初专注于对气态样品的非共振非弹性X射线散射研究。
