多普勒展宽和多普勒频移在光谱分析中的应用  

The Application of Doppler Broadening and Doppler Shift to Spectral Analysis

作　　者：徐伟[1] 方自深[2] 

机构地区：[1]广州大学(桂花岗校区)物理系,广东广州510405 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2002年第4期667-669,共3页Spectroscopy and Spectral Analysis

摘　　要：分析了多普勒展宽和多普勒频移区别 ,讨论了高斯拟合和弦积分线形分布的差异。利用多道光学分析仪 (OSMA)测量HT 6M托卡马克限制器前Hα 线形分布 。The distinction between Doppler broadening and Doppler shift has analyzed,Doppler brodening locally results from the distribution of velocities of the emitting particles,the line width gives the information on temperature of emitting particles.Doppler shift results when the emitting particles have a bulk non random flow velocity in a particular direction,the dirft of central wavelength gives the information on flow velocity of emitting particles,and the Doppler shift only drifts the profile of line without changing the width.The difference between Gaussian fitting and the distribution of chord integral line shape have also been discussed The distribution of H α spectral line shape has been derived from the surface of limiter in HT 6M Tokamak with optical spectroscope multichannel analysis (OSMA),the result by double Gaussian fitting shows that the line shape make up of two port,the emitting of reflect particles with higher energy and the release particle from the limiter surface.Ion temperature and recycling particle flow velocity have been obtained from Doppler broadening and Doppler shift.

关 键 词：多普勒展宽 多普勒频移 光谱分析 应用 等离子体 高斯拟合 HT-6M托卡马克装置 限制器 Hα线形分布 

分 类 号：TL61[核科学技术—核技术及应用] TL631.24