用失谐非色散多晶分析仪提高单次x射线光谱仪的分辨率。

IF 2.5 3区 物理与天体物理
Journal of Synchrotron Radiation Pub Date : 2025-03-01 Epub Date: 2025-02-17 DOI:10.1107/S1600577525000505
Taito Osaka, Yuichi Inubushi, Takashi Kameshima, Ichiro Inoue, Makina Yabashi
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引用次数: 0

摘要

本文提出并论证了一种提高单镜头x射线光谱仪能量分辨率的简单方法,该光谱仪由聚焦镜和单晶分析仪组成。两个以非色散几何排列的Si(220)通道切割晶体被用作分析仪。通过对其中一个晶体进行失谐,减小了多晶分析仪的衍射角宽度,从而在保持能量范围的同时提高了光谱仪的能量分辨率。10.4 keV x射线的原理验证实验清楚地表明,分辨率提高了两倍。发现x射线在晶体内的穿透使探测器上的点扩展函数变宽,在高度失谐的条件下显著影响能量分辨率。超过14米的长探测器距离有望实现100 meV的高能量分辨率和80 eV的范围,从而实现x射线自由电子激光辐射的全光谱表征以及先进的光谱技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Resolution enhancement on single-shot X-ray spectrometers using a detuned non-dispersive multi-crystal analyzer.

This study proposes and demonstrates a simple method for improving the energy resolution in a single-shot X-ray spectrometer, which consists of a focusing mirror and a single-crystal analyzer. Two Si(220) channel-cut crystals arranged in a non-dispersive geometry are employed as the analyzer. The angular width of diffraction for the multi-crystal analyzer is reduced by detuning one of the crystals, thereby enhancing the energy resolution of the spectrometer while maintaining the energy range. A proof-of-principle experiment with 10.4 keV X-rays clearly shows a resolution enhancement by a factor of two. It was found that X-ray penetration within the crystals broadened the point-spread function on the detector, significantly impacting the energy resolution under highly detuned conditions. A long detector distance of greater than 14 m is expected to achieve a high energy resolution of 100 meV and a range of 80 eV, enabling full spectral characterization of X-ray free-electron laser radiation as well as advanced spectroscopy techniques.

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来源期刊
Journal of Synchrotron Radiation
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.
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