Research of partition function on optical properties and temperature diagnosis of air plasma

OPTICS COMMUNICATIONS

卷:396

Article

Qiu, Dechuan¹  Gao, Guoqiang¹  Wei, Wenfu¹  Hu, Haixing¹  Li, Chunmao¹  Wu, Guangning¹ 

[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Sichuan, Peoples R China

关键词: Air plasmas;    Partition functions;    Plasma component;    Refractive index;    Moire deflectometry;    Temperature distribution;   

DOI  :  10.1016/j.optcom.2017.03.048

来源: Elsevier

【 摘 要 】

The relationship between partition function, particle density, refractive index, and temperature for atmospheric plasma is calculated based on thermodynamics and chemical equilibrium. Taking into account the contribution of hydrogen-like levels to the atomic partition function, a compact method to calculate the atomic partition function is first used with the Eindhoven model to deduce the plasma's refractive index. Results calculated by the new approach and two other traditional simplified methods are compared and analyzed. For a better understanding on the temperature measurement accuracy deduced by different partition function disposal approaches, moire deflectometry is employed as the experimental scheme to acquire the refractive index position curve. Finally, applicability of different partition function disposal approaches are discussed, and results indicate that the optical properties deduced in this paper are well suited for the refractive index based plasma diagnosis.

【 授权许可】

Free