title: A large-area diffuse air discharge plasma excited by nanosecond pulse under a double hexagon needle-array electrode.
abstract: A large-area diffuse air discharge plasma excited by bipolar nanosecond pulse is generated under a double hexagon needle-array electrode at atmospheric pressure. The images of the diffuse discharge, electric characteristics, and the optical emission spectra emitted from the diffuse air discharge plasma are obtained. Based on the waveforms of pulse voltage and current, the power consumption, and the power density of the diffuse air discharge plasma are investigated under different pulse peak voltages. The electron density and the electron temperature of the diffuse plasma are estimated to be approximately 1.42×10(11) cm(-3) and 4.4 eV, respectively. The optical emission spectra are arranged to determine the rotational and vibrational temperatures by comparing experimental with simulated spectra. Meanwhile, the rotational and vibrational temperatures of the diffuse discharge plasma are also discussed under different pulse peak voltages and pulse repetition rates, respectively. In addition, the diffuse air discharge plasma can form an area of about 70×50 mm(2) on the surface of dielectric layer and can be scaled up to the required size.
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. 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: 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.
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: Shuai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Tang
authors.affiliation: Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
authors.forename: Peng-Chao
authors.initials: PC
authors.lastname: Jiang
mesh_terms: D000388:Air; D001274:Atmospheric Pressure; D004560:Electricity; D004566:Electrodes; D058626:Plasma Gases / Q000737:chemistry*; D012399:Rotation; D013050:Spectrometry, Fluorescence; D013696:Temperature; D013997:Time Factors; D014732:Vibration
chemical_list: D058626:Plasma Gases
keywords: Atmospheric pressure; Diffuse dielectric barrier discharge; Hexagon needle-array electrode; Nanosecond pulse