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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (5): 054005.doi: 10.1088/2058-6272/aab601

• THE 8TH INTERNATIONAL CONFERENCE ON APPLIED ELECTROSTATICS • Previous Articles     Next Articles

Spectroscopic diagnosis of plasma in atmospheric pressure negative pulsed gas-liquid discharge with nozzle-cylinder electrode

Ming SUN (孙明)1,3, Zhan TAO (陶瞻)2, Zhipeng ZHU (朱志鹏)1 , Dong WANG (王东)2 and Wenjun PAN (潘文军)2   

  

  1. 1 Institute of Electrostatics, Shanghai Maritime University, Shanghai 201306, People’s Republic of China 2 Department of Electrical Automation, Shanghai Maritime University, Shanghai 201306, People’s Republic of China
  • Received:2017-11-08 Published:2018-03-12
  • Supported by:

    This work is supported by National Natural Science Foundation of China (Grant No. 51207089).

Abstract:

The plasma characteristics of a gas-liquid phase discharge reactor were investigated by optical and electrical methods. The nozzle-cylinder electrode in the discharge reactor was supplied with a negative nanosecond pulsed generator. The optical emission spectrum diagnosis revealed that OH (A2+→X2Π, 306–309 nm), N2 (C3Π→B3Πg, 337 nm), O (3p5p→3s5s0, 777.2 nm) and O (3p3p→3s3s0, 844.6 nm) were produced in the discharge plasma channels. The electron temperature (Te) was calculated from the emission relative intensity ratio between the atomic O 777.2 nm and 844.6 nm, and it increased with the applied voltage and the pulsed frequency and fell within the range of 0.5–0.8 eV. The gas temperature (Tg) that was measured by Lifbase was in a range from 400 K to 600 K.

Key words: gas-liquid negative pulsed discharge, discharge plasma, reactivate species, nozzlecylinder electrode, diagnosis