Operando measurement of lattice deformation profiles of synchrotron radiation monochromator

IF 3.6 1区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Science and Techniques Pub Date : 2024-07-08 DOI:10.1007/s41365-024-01465-7
Yue Zhang, Zhong-Liang Li, Shang-Yu Si, Lian Xue, Hong-Xin Luo, Xiao-Wei Zhang, Jun Hu
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Abstract

This study presents a new method for characterizing the thermal lattice deformation of a monochromator with high precision under service conditions and first reports the operando measurements of nanoscale thermal lattice deformation on a double-crystal monochromator at different incident powers. The nanoscale thermal lattice deformation of the monochromator first crystal was obtained by analyzing the intensity of the distorted DuMond diagrams. DuMond diagrams of the 333 diffraction index, sensitive to lattice deformation, were obtained directly using a 2D detector and an analyzer crystal orthogonal to the monochromator. With increasing incident power and power density, the maximum height of the lattice deformation increased from 3.2 to 18.5 nm, and the deformation coefficient of the maximum height increased from 1.1 to 3.2 nm/W. The maximum relative standard deviation was 4.2\(\%\), and the maximum standard deviation was 0.1 nm. Based on the measured thermal deformations, the flux saturation phenomenon and critical point for the linear operation of the monochromator were predicted with increasing incident power. This study provides a simple solution to the problem of the lower precision of synchrotron radiation monochromator characterizations compared to simulations.

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同步辐射单色仪晶格变形轮廓的运算测量
本研究提出了一种在使用条件下高精度表征单色仪热晶格变形的新方法,并首次报道了在不同入射功率下对双晶单色仪进行的纳米级热晶格变形的操作测量。单色仪第一晶体的纳米级热晶格变形是通过分析扭曲的 DuMond 图的强度获得的。利用二维探测器和与单色仪正交的分析晶体,直接获得了对晶格变形敏感的 333 衍射指数的杜蒙德图。随着入射功率和功率密度的增加,晶格变形的最大高度从 3.2 纳米增加到 18.5 纳米,最大高度的变形系数从 1.1 纳米/瓦增加到 3.2 纳米/瓦。最大相对标准偏差为 4.2\(\%\), 最大标准偏差为 0.1 nm。根据测量到的热变形,预测了随着入射功率的增加,单色器的通量饱和现象和线性工作的临界点。这项研究为同步辐射单色仪表征精度比模拟低的问题提供了一个简单的解决方案。
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来源期刊
Nuclear Science and Techniques
Nuclear Science and Techniques 物理-核科学技术
CiteScore
5.10
自引率
39.30%
发文量
141
审稿时长
5 months
期刊介绍: Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.
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