Optimization and testing of microfocus pulsed X-ray source

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-02-28 DOI:10.1016/j.nima.2025.170394

Jiaxin Bai , Yunpeng Liu , Junxu Mu , Sheng Lai , Hao Yu , Ao Xia , Kang Wang , Xiaobin Tang

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引用次数: 0

Abstract

Pulsed X-ray sources have applications in laser additive manufacturing monitoring, high-speed X-ray imaging, distributed pulsed X-ray systems, X-ray elastic imaging, and X-ray communication. In this paper, we propose a hot-cathode pulsed micro-focus X-ray source (PMFX) with multiple focusing electrodes. The source has been optimized using the CST-MATLAB joint simulation method, with the objective of achieving small focal spot, high tube current, low cut-off voltage, and excellent modulation performance. Simulation results show that the focal spot of the PMFX can be reduced to 45 μm × 25 μm and 6 μm × 20 μm at cut-off voltages of −11 V and −23 V, respectively, with corresponding relative tube currents of 35% and 48%. The current, pulse performance, and focal spot size of the structure with two focusing electrodes were tested in a dynamic vacuum system. The minimum effective focal spot was measured to be 285 μm × 53 μm at 25 kV, with an anode current of 98 μA, consistent with the trend observed in the simulation results. Additionally, an X-ray pulse frequency of 840 kHz was achieved.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.