Application of a data-driven tomography method for the Gas Electron Multiplier (GEM) based X-ray camera on EAST

IF 1.4 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 : 2025-04-01 Epub Date: 2025-02-07 DOI:10.1016/j.nima.2025.170281

Y. Hu , E. Li , C. Ma , C. Mai

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Abstract

A Gas Electron Multiplier (GEM) camera has been used for soft X-ray measurements on the Experimental Advanced Superconducting Tokamak (EAST), and the obtained data after a tomography calculation showed much useful information on the plasma macroscopic instabilities. A large experimental database has been built from the chord-integrated X-ray radiation signal measured by GEM, and we then develop a data-driven tomography method for fast viewing of X-ray emissivity profiles on the plasma cross-section. This tomography method is further applied in analyzing a plasma major disruption event, indicating there exists a vertical displacement event before a plasma current quench. This study suggests that the GEM camera with this fast data-driven tomography would be helpful for further feedback control of fusion plasmas to avoid plasma disruptions.

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数据驱动层析成像方法在基于EAST的气电子倍增器（GEM） x射线相机中的应用

利用气电子倍增器（GEM）相机对实验先进超导托卡马克（EAST）进行软x射线测量，所得数据经层析计算后得到了等离子体宏观不稳定性的有用信息。利用GEM测量的弦积分x射线辐射信号建立了一个大型实验数据库，然后我们开发了一种数据驱动的断层扫描方法，用于快速查看等离子体截面上的x射线发射率曲线。该层析成像方法进一步应用于等离子体大断裂事件的分析，表明在等离子体电流淬灭之前存在一个垂直位移事件。这项研究表明，具有这种快速数据驱动断层扫描的GEM相机将有助于进一步反馈控制聚变等离子体，以避免等离子体中断。

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

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.