线积分辐射率的有限探测器效应修正

核聚变与等离子体物理 ›› 2006, Vol. 26 ›› Issue (1): 8-12.

线积分辐射率的有限探测器效应修正

秦运文

(核工业西南物理研究院,成都 610041)

收稿日期:2005-03-22 修回日期:2005-07-14 出版日期:2006-03-15 发布日期:2012-05-29
作者简介:秦运文(1935-) ,男,重庆市人,研究员,1961年毕业于乌克兰哈尔科夫大学物理-数学系理论原子核物理专业,从事受控核聚变理论和托卡马克装置物理实验研究。

Correction at finite detector size effect on line-integrated emissivity

QIN Yun-wen

(Southwestern Institute of Physics , Chengdu 610041)

Received:2005-03-22 Revised:2005-07-14 Online:2006-03-15 Published:2012-05-29

摘要/Abstract

摘要：

在托卡马克等离子体辐射的诊断中 ,线积分辐射率与辐射发射率之间的关系 ,常采用探测器无穷小近似下的表达式。简单分析表明 ,只有在探测器极向尺寸远小于光栏极向尺寸时 ,这种近似才成立。在探测器与光栏的极向尺寸相同的情况下 ,束线宽度约为探测器无穷小近似下的宽度的两倍。对这种探测系统的线积分辐射率作了有限探测器效应修正 ,并简要讨论了它对层析分析的影响。

关键词: 托卡马克等离子体 , 线积分辐射率 , 层析分析

Abstract:

In tokamak plasma radiation diagnostics ,a relationship between the line-integrated emissivity and the plasma emissivity distribution in the infinitesimal-detector approximation is usually used. It can be shown that this approximation holds only for the detection system with the detector which has a poloidal size much smaller than that of the aperture. For the system with equal-size of detector and aperture, the cross-section of detector chord in plasma is twice as large as that in the infinitesimal-detector approximation. For such system the correction at finite detector size is derived for the line-integrated emissivity expression. The improvement by the correction on tomography analysis is discussed in brief.

Key words: Tokamak plasma , Line-integrated emisivity, Tomography analysis

中图分类号:

秦运文. 线积分辐射率的有限探测器效应修正[J]. 核聚变与等离子体物理, 2006, 26(1): 8-12.

QIN Yun-wen. Correction at finite detector size effect on line-integrated emissivity[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2006, 26(1): 8-12.

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