CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Angular stability measurement of a cryocooled double-crystal monochromator at SSRF
Fan, YC; Qin, HL; Zhu, WQ; Jia, WH; Liu, Y; Wang, J; Li, ZL
2020
Source PublicationNUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN0168-9002
Volume983Pages:-
Subtype期刊论文
AbstractPrecisely measuring the angular stability is essential to evaluate and improve the performance of the double-crystal monochromator (DCM). Herein, we apply a non-contact high-precision angular measurement method by utilization of the interferometers instead of conventional capacitive sensors, realizing a high resolution of picometer scale; particularly, a large working range of tens of millimeters can be simultaneously achieved, superior to previous method. By this means, we systematically investigate a homemade cryo-cooled DCM at Shanghai Synchrotron Radiation Facility (SSRF). The temporal stability as well as main eigen-frequencies of the DCM mechanics are measured at ambient temperature (25 degrees C) and under liquid nitrogen (LN2) cooling condition, respectively. Fast Fourier Transform (FFT) analysis of these data hints possible vibration sources. Accordingly, flexible tube with an alumina fiber textile inner is adopted and the support of the cooling lines is optimized. Furthermore, relative vibrations with different cryo-cooler settings are compared, revealing a slightly enhanced amplitude with increasing flow rate. Through these optimizations, the DCM achieves a vertical stability of 125 nrad RMS in 1 similar to 100 Hz and 180 nrad RMS in 1 similar to 1000 Hz over the full photon energy, which meets the requirement of the Fast X-ray Imaging beamline at SSRF.
DOI10.1016/j.nima.2020.164636
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32705
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
2.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Fan, YC,Qin, HL,Zhu, WQ,et al. Angular stability measurement of a cryocooled double-crystal monochromator at SSRF[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2020,983:-.
APA Fan, YC.,Qin, HL.,Zhu, WQ.,Jia, WH.,Liu, Y.,...&Li, ZL.(2020).Angular stability measurement of a cryocooled double-crystal monochromator at SSRF.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,983,-.
MLA Fan, YC,et al."Angular stability measurement of a cryocooled double-crystal monochromator at SSRF".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 983(2020):-.
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