title: Spectroscopic and electrical characters of SBD plasma excited by bipolar nanosecond pulse in atmospheric air.
abstract: In this paper, an atmospheric surface barrier discharge (SBD) generated by annular electrodes in quartz tube is presented through employing bipolar nanosecond pulse voltage in air. The discharge images, waveforms of pulse voltage and discharge current, and optical emission spectra emitted from the discharges are recorded and calculated. A spectra simulation method is developed to separate the overlap of the secondary diffraction spectra which are produced by grating in monochromator, and N2 (B(3)Πg→A(3)Σu(+)) and O (3p(5)P→3s(5)S2(o)) are extracted. The effects of pulse voltage and discharge power on the emission intensities of OH (A(2)Σ(+)→X(2)Пi), N2(+) (B(2)Σu(+)→X(2)Σg(+)), N2 (C(3)Πu→B(3)Πg), N2 (B(3)Πg→A(3)Σu(+)), and O (3p(5)P→3s(5)S2(o)) are investigated. It is found that increasing the pulse peak voltage can lead to an easier formation of N2(+) (B(2)Σu(+)) than that of N2 (C(3)Πu). Additionally, vibrational and rotational temperatures of the plasma are determined by comparing the experimental and simulated spectra of N2(+) (B(2)Σu(+)→X(2)Σg(+)), and the results show that the vibrational and rotational temperatures are 3250±20K and 350±5K under the pulse peak voltage of 28kV, respectively.
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Zi-Lu
authors.initials: ZL
authors.lastname: Zhao
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: De-Zheng
authors.initials: DZ
authors.lastname: Yang
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China. Electronic address: wangwenc@dlut.edu.cn.
authors.forename: Wen-Chun
authors.initials: WC
authors.lastname: Wang
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Liu
authors.affiliation: Key Lab of Materials Modification, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
keywords: Atmospheric pressure; Nanosecond pulsed discharge; Optical emission spectra; Surface barrier discharge (SBD)