用于l壳层多电离原子x射线研究的紧凑型真空平晶光谱仪的研制

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2025-06-17 DOI:10.1016/j.sab.2025.107256

W. Wang , C.J. Shao , D.Y. Yu , X.H. Cai

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引用次数: 0

摘要

我们提出了一种高度紧凑的真空平晶光谱仪，设计用于精确分析l -壳层多电离原子的x射线光谱。该设计结合了一个数学框架来阐明几何参数对光谱带宽、能量分辨率和探测效率的影响。该光谱仪的工作能量范围为0.53-19.3 keV，单次曝光光谱带宽为0.04-6.58 keV。这种性能是通过多个平面晶体的组合和与晶体旋转同步的线性目标运动的设计实现的，允许布拉格角从25°到65°调制。利用10 keV电子束与固体银靶相互作用产生的l系列x射线对光谱仪进行校准。对比性能测试表明，拼接HOPG（002）晶体的分辨能力超过400，而完美的Si（111）晶体的分辨能力接近500。然而，马赛克HOPG的检测效率高出20倍以上，在高灵敏度x射线光谱中检测罕见跃迁尤其有效。该光谱仪在不同领域具有广泛的适用性，包括对x射线参数的化学效应，同步辐射实验，激光等离子体诊断和实验室天体物理学。

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Development of a compact vacuum flat-crystal spectrometer for X-ray studies of L-shell multi-ionized atoms

We present the development of a highly compact vacuum flat-crystal spectrometer designed for the precise analysis of X-ray spectra of L-shell multi-ionized atoms. The design incorporates a mathematical framework to elucidate the influence of geometrical parameters on spectral bandwidth, energy resolution, and detection efficiency.

The spectrometer operates over an energy range of 0.53–19.3 keV, achieving a single-exposure spectral bandwidth of 0.04–6.58 keV. This performance is achieved by the combination of multiple flat crystals and a design featuring linear target motion synchronized with crystal rotation, allowing Bragg angle modulation from 25° to 65°.

The spectrometer was calibrated using L-series X-ray generated by 10 keV electron beam interactions with a solid silver target. Comparative performance tests indicated that the resolving power of the mosaic HOPG(002) crystal exceeds 400, while the perfect Si(111) crystal approaches 500. However, the mosaic HOPG exhibited over 20 times higher detection efficiency, making it especially effective for detecting rare transitions in high-sensitivity X-ray spectroscopy.

This spectrometer offers broad applicability across diverse fields, including chemical effects on X-ray parameters, synchrotron radiation experiments, laser plasma diagnostics, and laboratory astrophysics.

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来源期刊

Spectrochimica Acta Part B: Atomic Spectroscopy 物理-光谱学

CiteScore

6.10

自引率

12.10%

发文量

173

审稿时长

81 days

期刊介绍： Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.