A large-area diffuse air discharge plasma excited by nanosecond pulse under a double hexagon needle-array electrode
详细信息 查看全文
- 作者：Zhi-Jie Liu ; Wen-Chun Wang ; De-Zheng Yang ; Sen Wang ; Shuai Zhang ; Kai Tang ; Peng-Chao Jiang
- 关键词：Nanosecond pulse ; Hexagon needle-array electrode ; Diffuse dielectric barrier discharge ; Atmospheric pressure
- 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
- 出版年：5 March, 2014
- 年：2014
- 卷：121
- 期：Complete
- 页码：698-703
- 全文大小：1527 K
文摘
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 脳 1011 cm鈭? 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 脳 50 mm2 on the surface of dielectric layer and can be scaled up to the required size.