Analysis of the Zeeman effect on Dαspectra on the EAST tokamak  

作　　者：高伟 黄娟 吴承瑞 许棕 侯玉梅 金钊 陈颖杰 张鹏飞 张凌 吴振伟 EAST Team 

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China

出　　处：《Chinese Physics B》2017年第4期276-282,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11275231 and 11575249);the National Magnetic Confinement Fusion Energy Research Program of China(Grant No.2015GB110005)

摘　　要：Based on the passive spectroscopy,the D_α atomic emission spectra in the boundary region of the plasma have been measured by a high resolution optical spectroscopic multichannel analysis（OSMA） system in EAST tokamak.The Zeeman splitting of the D_α spectral lines has been observed.A fitting procedure by using a nonlinear least squares method was applied to fit and analyze all polarization π and ±σ components of the D_α atomic spectra to acquire the information of the local plasma.The spectral line shape was investigated according to emission spectra from different regions（e.g.,low-field side and high-field side） along the viewing chords.Each polarization component was fitted and classified into three energy categories（the cold,warm,and hot components） based on different atomic production processes,in consistent with the transition energy distribution by calculating the gradient of the D_α spectral profile.The emission position,magnetic field intensity,and flow velocity of a deuterium atom were also discussed in the context.Based on the passive spectroscopy,the D_α atomic emission spectra in the boundary region of the plasma have been measured by a high resolution optical spectroscopic multichannel analysis（OSMA） system in EAST tokamak.The Zeeman splitting of the D_α spectral lines has been observed.A fitting procedure by using a nonlinear least squares method was applied to fit and analyze all polarization π and ±σ components of the D_α atomic spectra to acquire the information of the local plasma.The spectral line shape was investigated according to emission spectra from different regions（e.g.,low-field side and high-field side） along the viewing chords.Each polarization component was fitted and classified into three energy categories（the cold,warm,and hot components） based on different atomic production processes,in consistent with the transition energy distribution by calculating the gradient of the D_α spectral profile.The emission position,magnetic field intensity,and flow velocity of a deuterium atom were also discussed in the context.

关 键 词：Zeeman effect PLASMA SPECTRUM DEUTERIUM 

分 类 号：TL612[核科学技术—核技术及应用]