A 1-m non-resonant inelastic x-ray scattering spectrometer at BL15U, Shanghai Synchrotron Radiation Facility

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...

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Bibliographic Details
Published in:Review of scientific instruments 2018-08, Vol.89 (8), p.085108-085108
Main Authors: Ni, Dong-Dong, Kang, Xu, Yan, Shuai, Huang, Xin-Chao, Xiong, Tao, Liang, Dong-Xu, Yang, Ke, Zhu, Lin-Fan
Format: Article
Language:English
Subjects:
Bragg angle
Bragg equation
Energy resolution
Form factors
Helium
Inelastic scattering
Momentum transfer
Scientific apparatus & instruments
Synchrotron radiation
X ray spectrometers
X-ray scattering
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Summary: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 21S + 21P 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−1 < q < 8.68 Å−1 and to initially focus on the non-resonant inelastic x-ray scattering studies on gaseous samples.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5030032