电荷交换复合光谱法测量EAST径向氢氘比

doi:10.3969/j.issn.1007-5461.2025.05.003

量子电子学报 ›› 2025, Vol. 42 ›› Issue (5): 611-619.doi: 10.3969/j.issn.1007-5461.2025.05.003

电荷交换复合光谱法测量EAST径向氢氘比

史唱 1,2, 黄娟 1*, 高伟 1*, 孙延旭 1,2, 王书松 1, 王曦辉 1,2

1 中国科学院合肥物质科学研究院等离子体物理研究所, 安徽合肥 230031; 2 中国科学技术大学, 安徽合肥 230026

收稿日期:2023-07-05 修回日期:2023-09-22 出版日期:2025-09-28 发布日期:2025-09-28
通讯作者: E-mail: juan.huang@ipp.ac.cn; gw118@ipp.ac.cn E-mail:E-mail: juan.huang@ipp.ac.cn; gw118@ipp.ac.cn
作者简介:史唱 ( 1998 - ), 女, 研究生, 主要从事等离子体光谱诊断方面的研究。E-mail: chang.shi@ipp.ac.cn
基金资助:
国家磁约束聚变能源研究专项 (2019YFE03020004), 国家自然科学基金 (11975276), 安徽省重点研发计划 (202104b11020003)

Measurement of Radial Hydrogen-Deuterium Ratio in EAST by Charge Exchange Recombination Spectroscopy

SHI Chang1,2 , HUANG Juan1*, GAO Wei 1*, SUN Yanxu1,2 , WANG Shusong1 , WANG Xihui 1,2

1 Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Received:2023-07-05 Revised:2023-09-22 Published:2025-09-28 Online:2025-09-28

摘要/Abstract

摘要： 针对氢同位素比值测量在聚变研究中的重要性, 本文研究了利用主离子电荷交换复合光谱诊断 (MICER) 系统, 测量EAST超导托卡马克中的等离子体芯部氢 (H) 和氘 (D) 密度比的数据处理方法。实验上, 利用中性束注入的调制注入方法, 实现MICER信号中的等离子体边缘D (H) 辐射本底的扣除; 实验数据处理上, 利用八高斯拟合法结合塞曼效应分析, 对Hα和Dα的电荷交换发射谱线进行谱线分离。具体在高斯拟合中, 假定主离子温度和速度与碳离子的相同, 以等离子体旋转速度作为多普勒频移速度, 由碳电荷交换谱的展宽推测出Hα和Dα的发射谱展宽参数, 最终将高斯拟合的自由参量从12个缩减为4个。该数据处理方法可以成功分离出热Hα和热Dα的发射谱线, 从而实现对等离子体芯部H和D密度比的测量。

关键词: 等离子体物理学, 等离子体芯部氢氘比, 光谱诊断, 塞曼效应, 高斯拟合

Abstract: In response to the significance of hydrogen isotope ratio measurement in fusion research, the paper investigates the measurement of the density ratio of hydrogen (H) to deuterium (D) in the core plasma of EAST superconducting tokamak using the main ion charge exchange recombination spectroscopic diagnosis (MICER) system. In experiment, the neutral beam injection (NBI) modulation method is employed to effectively subtract the plasma edge D (H) radiation background from the MICER signal. During the experimental data processing stage, a eight-Gaussian fitting approach combined with Zeeman effect analysis is utilized to separate the charge exchange emission lines of Hα and Dα. The eightGaussian fitting assumes that the main ion temperature and velocity are the same as those of carbon ions, utilizes the plasma rotation velocity as the Doppler frequency shift velocity, and estimates the broadening parameters of Hα and Dα emission spectrum based on the broadening of the carbon charges exchange spectrum. As a result, the number of free parameters of Gaussian fitting is reduced from 12 to 4. The spectral line fitting method successfully distinguishes the radiation lines of thermal Hα from thermal Dα, thus enabling the measurement of the density ratio of hydrogen (H) to deuterium (D) in the plasma core.

Key words: plasma physics, hydrogen-deuterium ratio in core plasma, spectroscopic diagnostics, Zeeman effect, Gaussian fitting

中图分类号:

史唱, 黄娟, 高伟, 孙延旭, 王书松, 王曦辉, . 电荷交换复合光谱法测量EAST径向氢氘比[J]. 量子电子学报, 2025, 42(5): 611-619.

SHI Chang, , HUANG Juan, GAO Wei , SUN Yanxu, , WANG Shusong , WANG Xihui , . Measurement of Radial Hydrogen-Deuterium Ratio in EAST by Charge Exchange Recombination Spectroscopy[J]. Chinese Journal of Quantum Electronics, 2025, 42(5): 611-619.

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电荷交换复合光谱法测量EAST径向氢氘比

Measurement of Radial Hydrogen-Deuterium Ratio in EAST by Charge Exchange Recombination Spectroscopy

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