title: [Study on homogeneity of low-pressure air dielectric barrier discharge by optical emission spectrum].
abstract: In the present work, a uniform discharge in low-pressure air was obtained by a dielectric barrier discharge device. The spatial homogeneity of the plasma temperature was studied by optical emission spectrum. The vibrational temperature was calculated by second positive band C3 pi(u) --> B3 pi(g) and the rotational temperature (gas temperature) was calculated by N2+ first negative band B 2 sigma(u)+ --> X 2 sigma(g)+. It was found that the vibrational temperature decreases with the voltage increasing, while the rotational temperature increases. In addition, the fluctuation amplitudes of vibrational and rotational temperature of the plasma along diameter of the discharge area decrease with the voltage increasing, which indicates that the homogeneity of the plasma increases with the voltage increasing. These results are of great significance to the application of uniform discharge obtained in air dielectric barrier discharge for material processing.
authors.affiliation: College of Physics Science and Technology, Hebei University, Baoding 071002, China. dongLF@hbu.cn
authors.forename: Li-Fang
authors.initials: LF
authors.lastname: Dong
authors.forename: Shuai
authors.initials: S
authors.lastname: Wang
authors.forename: Wei-Yuan
authors.initials: WY
authors.lastname: Liu
authors.forename: Yu-Jie
authors.initials: YJ
authors.lastname: Yang
authors.forename: Han
authors.initials: H
authors.lastname: Yue
authors.forename: Hong
authors.initials: H
authors.lastname: Xiao