Improvement of the performance of a cryo-cooled monochromator at SSRF. Part II: Angular stability of the exit beam

doi:10.1016/j.nima.2020.164872

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	Improvement of the performance of a cryo-cooled monochromator at SSRF. Part II: Angular stability of the exit beam
	J. Wu; X. Gong; Y. Song; J. Chen; W. Zhu; Y. Liu; Y. Fan and L. Jin
	2021
发表期刊	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ISSN	1689002
卷号	988
摘要	The angular stability of the crystals used in the monochromator is crucial for the beam position, the flux and the resolution for the synchrotron based hard X-ray beamline. In this paper, we report a performance optimization to a double-crystal monochromator (DCM) which has served for nearly 10 years at Shanghai Synchrotron Radiation Facility (SSRF). By upgrading the design of the clamping and the cooling to the 2nd crystal, the layout of the LN2 circuit, the structure of the 2nd crystal assembly and the thermal insulation as well as the temperature stabilization system, the resulted angular stability of the crystals in working condition (LN2 circulation) tested by the angular stability of the exit beam has been greatly improved from approximately 500 nrad RMS/2 h up to better than 200 nrad RMS/2 h in vertical direction (pitch rotation of the crystals) and better than 300 nrad RMS/2 h in horizontal direction (roll rotation of the crystals) respectively, which meets the requirement by 300 nrad RMS/2 h in user experiments of the BSL-2 macromolecular crystallography beamline (P2, BL10U2). 2020 Elsevier B.V.
DOI	10.1016/j.nima.2020.164872
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65333
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Wu,X. Gong,Y. Song,et al. Improvement of the performance of a cryo-cooled monochromator at SSRF. Part II: Angular stability of the exit beam[J]. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,2021,988.
APA	J. Wu.,X. Gong.,Y. Song.,J. Chen.,W. Zhu.,...&Y. Fan and L. Jin.(2021).Improvement of the performance of a cryo-cooled monochromator at SSRF. Part II: Angular stability of the exit beam.Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,988.
MLA	J. Wu,et al."Improvement of the performance of a cryo-cooled monochromator at SSRF. Part II: Angular stability of the exit beam".Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 988(2021).

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