线积分辐射率的有限探测器效应修正  

Correction at finite detector size effect on line-integrated emissivity

作　　者：秦运文[1] 

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2006年第1期8-12,共5页Nuclear Fusion and Plasma Physics

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。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.

关 键 词：托卡马克等离子体 线积分辐射率 层析分析 

分 类 号：O536[理学—等离子体物理] TL65[理学—物理]