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论文类型：期刊论文

发表时间：2014-05-09

发表刊物：EUROPEAN PHYSICAL JOURNAL D

收录刊物：SCIE

卷号：68

期号：5

ISSN号：1434-6060

摘要：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).