Diagnosis of plasma emission spectrum and measurement of N2 vibration 
temperature

YANG Shi⁃zhe, CHEN Han⁃lin, FENG Xin, LIU Chen⁃yu, TAO Xiao⁃ping, WANG Zhong⁃ping, ZHANG Zeng⁃ming

doi:10.16854 / j.cnki.1000-0712.210213

College Physics >

2022 , Vol. 41 >Issue 2: 58

DOI: https://doi.org/10.16854 / j.cnki.1000-0712.210213

Diagnosis of plasma emission spectrum and measurement of N₂vibration temperature

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School of Physical Sciences，University of Science and Technology of China，Hefei， Anhui 230026，China

Online published: 2022-03-11

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Abstract

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 65P_a air plasma and 14P_a air-CO₂ plasma are observed, the strongest of which are recognized as the first and second positive system of N₂. The vibration temperatures along the central axis are calculated using the relative intensity of the second positive system of N₂.

Key words： plasma; emission spectrum; the second positive system; vibration temperature; DC glow dis?charge

Cite this article

YANG Shi⁃zhe, CHEN Han⁃lin, FENG Xin, LIU Chen⁃yu, TAO Xiao⁃ping, WANG Zhong⁃ping, ZHANG Zeng⁃ming . Diagnosis of plasma emission spectrum and measurement of N₂vibration temperature[J]. College Physics, 2022 , 41(2) : 58 . DOI: 10.16854 / j.cnki.1000-0712.210213

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