量子电子学报2025，Vol.42Issue(5)：611-619,9.DOI:10.3969/j.issn.1007-5461.2025.05.003
电荷交换复合光谱法测量EAST径向氢氘密度比
Measurement of radial hydrogen-deuterium density ratio in EAST using charge exchange recombination spectroscopy
摘要
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 eight-Gaussian 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.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Key words
plasma physics/hydrogen-deuterium ratio in core plasma/spectroscopic diagnostics/Zeeman effect/Gaussian fitting分类
数理科学引用本文复制引用
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径向氢氘密度比[J].量子电子学报,2025,42(5):611-619,9.基金项目
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) （2019YFE03020004）
