Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2014;121:698-703. doi: 10.1016/j.saa.2013.12.009. Epub 2013 Dec 10.
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.
在大气压下，双六角形针-阵列电极下产生了由双极性纳秒脉冲激励的大面积弥散空气放电等离子体。获得了弥散放电的图像、电特性和弥散空气放电等离子体发出的光发射光谱。基于脉冲电压和电流的波形，研究了不同脉冲峰值电压下弥散空气放电等离子体的功率消耗和功率密度。估计弥散等离子体的电子密度和电子温度约为 1.42×10(11) cm(-3)和 4.4 eV。通过将实验与模拟光谱进行比较，对光发射光谱进行排列以确定旋转和振动温度。同时，还分别讨论了在不同脉冲峰值电压和脉冲重复率下弥散放电等离子体的旋转和振动温度。此外，弥散空气放电等离子体可以在介电层表面形成约 70×50 mm(2)的区域，并且可以扩展到所需的尺寸。
