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Indexed by:期刊论文

Date of Publication:2014-05-09

Journal:EUROPEAN PHYSICAL JOURNAL D

Included Journals:SCIE

Volume:68

Issue:5

ISSN No.:1434-6060

Abstract:In this study, a bipolar high-voltage pulse with 20 ns rising time is employed to generate diffuse dielectric barrier discharge plasma using wire-plate electrode configuration in nitrogen at atmospheric pressure. The gas temperature of the plasma is determined by comparing the experimental and the best fitted optical emission spectra of the second positive bands of N-2((CI)-I-3 (u) -> B-3 I (g), 0-2) and the first negative bands of N-2 (+) (B-2 I (u) pound (+) -> X-2 I (g) pound (+), 0-0). The effects of the concentration of argon and oxygen on the emission intensities of N-2 ((CI)-I-3 (u) -> (BI)-I-3 (g), 0-0, 337.1 nm), OH (A I-2  pound -> (XI)-I-2 , 0-0) and N-2 (+) (B-2 I (u) pound (+) -> X-2 I (g) pound (+), 0-0, 391.4 nm) are investigated. It is shown that the plasma gas temperature keeps almost constant with the pulse repetition rate and pulse peak voltage increasing. The emission intensities of N-2 ((CI)-I-3 (u) -> (BI)-I-3 (g), 0-0, 337.1 nm), OH(A(2)I  pound -> (XI)-I-2 , 0-0) and N-2 (+) (B-2 I (u) pound (+) -> X-2 I (g) pound (+), 0-0, 391.4 nm) rise with increasing the concentration of argon, but decrease with increasing the concentration of oxygen, and the influences of oxygen concentration on the emission intensities of N-2((CI)-I-3 (u) -> (BI)-I-3 (g), 0-0, 337.1 nm) and OH (A(2)I  pound -> (XI)-I-2 , 0-0) are more greater than that on the emission intensity of N-2 (+) (B-2 I (u) pound (+) -> X-2 I (g) pound (+), 0-0, 391.4 nm).