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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (7): 075404.doi: 10.1088/2058-6272/aabac8

• Low Temperature Plasma • Previous Articles     Next Articles

Spectroscopic study of bipolar nanosecond pulse gas-liquid discharge in atmospheric argon

Sen WANG (王森)1,2, Dezheng YANG (杨德正)1, Feng LIU (刘峰)2, Wenchun WANG (王文春)1,3 and Zhi FANG (方志)2,3   


  1. 1 Key Lab of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, People’s Republic of China
    2 College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211009, People’s Republic of China  
  • Received:2018-01-07 Published:2018-03-26
  • Supported by:

    This work is supported by National Natural Science Foundation of China (Grant Nos. 51677019) and National Key Research and Development Program of China (2016YFC0207200).


Atmospheric gas-liquid discharge with argon as a working gas is presented by employed nanosecond pulse power. The discharge is presented in a glow-like mode. The discharge powers are determined to be less than 1 W, and remains almost constant when the discharge duration time increases. Bountiful active species are determined by capturing optical emission spectra, and their main generation processes are also discussed. The plasma gas temperature is calculated as 350 K by comparing the experimental spectra and the simulated ones of  The time resolved vibrational and rotational temperature is researched to present the stability of discharge when pulse voltage and discharge duration vary. The electron density is determined to be 1016 cm−3 according to the Stark broadening effect of the Hα line.

Key words: nanosecond pulse discharge, gas-liquid discharge, optical emission spectra, electron density