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

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-05-23 DOI:10.1107/S160057752500342X

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

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引用次数: 0

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.

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通过通量与功率的测量来表征低温冷却硅晶体单色仪。

基于金刚石光源下四种不同光束线的实验数据，研究了同步加速器双晶单色器中低温冷却硅的热负荷。通过改变存储环电流，在第一个单色晶体上沉积不同数量的功率。当功率和功率密度高于阈值时，晶体变形导致衍射效率下降。结果与热-机械变形的解析模型一致。利用该模型确定单色仪热负荷的可接受值，以确保单色仪的最佳功能。这个模型，之前测试了有限元分析，现在验证了测量数据，它将被用作一个工具，在升级的光子源单色仪性能的初步分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Synchrotron Radiation INSTRUMENTS & INSTRUMENTATIONOPTICS&-OPTICS

CiteScore

5.60

自引率

12.00%

发文量

289

审稿时长

1 months

期刊介绍： Synchrotron radiation research is rapidly expanding with many new sources of radiation being created globally. Synchrotron radiation plays a leading role in pure science and in emerging technologies. The Journal of Synchrotron Radiation provides comprehensive coverage of the entire field of synchrotron radiation and free-electron laser research including instrumentation, theory, computing and scientific applications in areas such as biology, nanoscience and materials science. Rapid publication ensures an up-to-date information resource for scientists and engineers in the field.