等离子体发射光谱的诊断及N_(2)振动温度的测量  

Diagnosis of plasma emission spectrum and measurement of N_(2) vibration temperature

作　　者：杨世哲 陈翰霖 冯鑫 刘晨宇 陶小平[1] 王中平[1] 张增明[1] YANG Shi-zhe;CHEN Han-lin;FENG Xin;LIU Chen-yu;TAO Xiao-ping;WANG Zhong-ping;ZHANG Zeng-ming(School of Physical Sciences,University of Science and Technology of China,Hefei,Anhui 230026,China)

机构地区：[1]中国科学技术大学物理学院,安徽合肥230026

出　　处：《大学物理》2022年第2期58-62,共5页College Physics

基　　金：教育部高等学校大学物理教学指导委员会立项项目(DJZW201920hd);安徽省教学研究项目(2019jyxm0018)资助。

摘　　要：本文自行设计圆柱形真空管以产生可达几帕的低压环境,并在65 Pa空气和14 Pa的空气-CO_(2)混合气体直流放电中观测了管轴线上各点的发射光谱,并区分出其中最强的谱带系为N_(2)的第一正带系和第二正带系,进而利用第二正带系的相对强度计算了两种环境下氮气分子的振动温度沿放电管轴线的分布情况.Vacuum with pressure of several pascals is generated by a self-made cylindrical tube.The emission spectra along the central axis of the tube of 65Pa air plasma and 14Pa air-CO_(2)plasma are observed,the strongest of which are recognized as the first and second positive system of N_(2).The vibration temperatures along the central axis are calculated using the relative intensity of the second positive system of N_(2).

关 键 词：等离子体 发射光谱 第二正带系 振动温度 直流辉光放电 

分 类 号：O539[理学—等离子体物理]