HL-3 装置快电子轫致辐射二维成像模拟研究

doi:10.16568/j.0254-6086.202503016

核聚变与等离子体物理 ›› 2025, Vol. 45 ›› Issue (3): 365-372.DOI: 10.16568/j.0254-6086.202503016

• 等离子体物理 • 上一篇

HL-3 装置快电子轫致辐射二维成像模拟研究

关帅¹，程时葵²，张轶泼^*1，张洁¹，朱宇轩¹

(1. 核工业西南物理研究院，成都 610041；2. 重庆理工大学理学院，重庆 400054)

收稿日期:2024-01-12 修回日期:2024-12-17 出版日期:2025-09-15 发布日期:2025-09-29
通讯作者: 张轶泼(1980-)，男，河南西平人，研究员，从事核聚变等离子体诊断和实验物理。
作者简介:关帅(1994-)，女，吉林吉林人，硕士研究生，从事聚变等离子体物理实验研究。
基金资助:
国家自然科学基金(12305239)；国家磁约束核聚变能发展研究专项(2019YFE03010001)；江西省重点研发计划(20223BBH80006)

Simulation study of fast electron bremsstrahlung imaging in the HL-3 tokamak

GUAN Shuai¹, CHENG Shi-kui², ZHANG Yi-po¹, ZHANG Jie¹, ZHU Yu-xuan¹

(1. Southwestern Institute of Physics, Chengdu 610041; 2. College of Physics, Chongqing University of Technology, Chongqing 400054)

Received:2024-01-12 Revised:2024-12-17 Online:2025-09-15 Published:2025-09-29

摘要/Abstract

摘要：

针对高参数物理实验的诊断需求，中国环流三号(HL-3)装置计划发展一套二维硬X 射线(HXR)成像系统用于快电子物理实验。利用蒙特卡罗代码Geant4 构建了HL-3 装置快电子轫致辐射模型，输入源依据实验测量得到的电子温度和密度分布，同时考虑了等离子体环效应和快电子轫致辐射前向性。计算表明，虽然等离子体分布由于环效应而具有不对称性，但是在小孔成像以及快电子轫致辐射前向性的共同作用下，HXR 辐射在探测器上的能量沉积呈现出对称分布，并且与快电子密度剖面分布相吻合。模拟研究结果为二维HXR 成像诊断的系统设计和优化提供了理论支持，同时有助于进一步分析快电子轫致辐射实验测量数据，以开展更加深入的高能量电子物理研究。

关键词: 快电子轫致辐射, 硬X 射线, Geant4, 中国环流三号

Abstract:

In response to the diagnostic needs of high parameter physics experiments, the HL-3 tokamak plans to develop a two-dimensional hard X-ray (HXR) imaging system for fast electron physics experiments. A fast electron bremsstrahlung radiation model for the HL-3 tokamak has been constructed using the Monte Carlo code Geant4. The input source was based on the experimentally measured electron temperature and density distribution, while considering the plasma toroidicity and the forward fast electron bremsstrahlung radiation. The calculation shows that although the plasma distribution is asymmetric due to the toroidicity, the energy deposition of HXR radiation on the detectors exhibits a symmetrical distribution under the mutual effect of pinhole imaging

and the forward fast electron bremsstrahlung, which is consistent with the fast electron density profile. The simulation results of this article provide theoretical support for the system design and optimization of two-dimensional HXR imaging diagnosis, and also help to further analyze the experimental data of fast electron bremsstrahlung, in order to carry out energetic electron physics research.

Key words: Fast electron bremsstrahlung, Hard X-ray, Geant4, HL-3 tokamak

中图分类号:

TL65⁺9

关帅, 程时葵, 张轶泼, 张洁, 朱宇轩. HL-3 装置快电子轫致辐射二维成像模拟研究[J]. 核聚变与等离子体物理, 2025, 45(3): 365-372.

GUAN Shuai, CHENG Shi-kui, ZHANG Yi-po, ZHANG Jie , ZHU Yu-xuan. Simulation study of fast electron bremsstrahlung imaging in the HL-3 tokamak[J]. Nuclear Fusion and Plasma Physics, 2025, 45(3): 365-372.

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HL-3 装置快电子轫致辐射二维成像模拟研究

Simulation study of fast electron bremsstrahlung imaging in the HL-3 tokamak

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