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通过测量通量与功率对低温冷却硅晶体单色仪进行表征。

Characterization of cryo-cooled silicon crystal monochromators via measurement of flux versus power.

作者信息

Alianelli Lucia, Khosroabadi Hossein, Sutter John, Walters Andrew C, Romano Pierpaolo, Geraki Kalotina, Carlá Francesco, Rawle Jonathan, Barnett Sarah, Sawhney Kawal

机构信息

Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.

出版信息

J Synchrotron Radiat. 2025 Jul 1;32(Pt 4):919-923. doi: 10.1107/S160057752500342X. Epub 2025 May 23.

DOI:10.1107/S160057752500342X
PMID:40408294
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12236249/
Abstract

A study on the thermal load of cryogenically cooled silicon in synchrotron double-crystal monochromators is presented, based on experimental data from four different beamlines at Diamond Light Source. Different amounts of power are deposited on the first monochromator crystal by varying the storage ring current. The resulting crystal deformation causes a decline in the diffraction efficiency when power and power density are above threshold values. The results are compatible with an analytical model of thermo-mechanical deformation. Acceptable monochromator heat load values are determined with this model, to ensure optimal function of the monochromator. This model, previously tested against finite element analyses, is now validated against measured data and it will be used as a tool for initial analysis of monochromator performance on upgraded photon sources.

摘要

基于钻石光源四个不同光束线的实验数据，对同步辐射双晶单色仪中低温冷却硅的热负荷进行了研究。通过改变储存环电流，不同量的功率沉积在第一个单色仪晶体上。当功率和功率密度高于阈值时，由此产生的晶体变形会导致衍射效率下降。结果与热机械变形的分析模型相符。利用该模型确定了可接受的单色仪热负荷值，以确保单色仪的最佳功能。该模型之前已通过有限元分析进行测试，现在根据实测数据进行了验证，并将用作升级光子源上单色仪性能初步分析的工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/dc2c0455eb28/s-32-00919-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/53825e885b96/s-32-00919-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/3c73a42374f3/s-32-00919-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/dc2c0455eb28/s-32-00919-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/53825e885b96/s-32-00919-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/3c73a42374f3/s-32-00919-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/21f2/12236249/dc2c0455eb28/s-32-00919-fig3.jpg

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本文引用的文献

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2
Cryo-cooled silicon crystal monochromators: a study of power load, temperature and deformation.低温冷却硅晶体单色仪：功率负载、温度及变形研究
J Synchrotron Radiat. 2022 Mar 1;29(Pt 2):377-385. doi: 10.1107/S160057752200039X. Epub 2022 Feb 8.
3
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ShadowOui: a new visual environment for X-ray optics and synchrotron beamline simulations.ShadowOui：用于X射线光学和同步加速器光束线模拟的新视觉环境。
J Synchrotron Radiat. 2016 Nov 1;23(Pt 6):1357-1367. doi: 10.1107/S1600577516013837. Epub 2016 Oct 14.
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Diamond beamline I07: a beamline for surface and interface diffraction.钻石光束线I07：用于表面和界面衍射的光束线。
J Synchrotron Radiat. 2016 Sep 1;23(Pt 5):1245-53. doi: 10.1107/S1600577516009875. Epub 2016 Jul 27.
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