介质阻挡放电丝模式和均匀模式转化的特性  

Study on the transition from filamentary to uniform discharge in dielectric barrier discharge

作　　者：李雪辰[1] 贾鹏英[1] 刘志辉[1] 李立春[1] 董丽芳[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《物理学报》2008年第2期1001-1007,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10575027;10647123);河北省自然科学基金(批准号:A2006000950;A2007000134);河北省教育厅项目(批准号:2006106)资助的课题.~~

摘　　要：利用水电极介质阻挡放电装置,采用电学方法和发射光谱,研究了空气中介质阻挡放电从微放电丝模式向均匀放电模式转化的过程.结果表明,大气压下增大外加电压或者电压一定减小气压,放电都能够从微放电丝模式过渡到均匀模式.高气压下放电为流光击穿而低气压下为辉光放电.利用放电发射光谱,研究了高能电子比例随实验参数的变化.结果表明气压减小时高能电子比例增大,电压增加时高能电子减少.利用壁电荷理论对以上实验结果进行了定性分析.结果对介质阻挡均匀放电的深入研究具有重要价值.The transition from filamentary discharge to uniform discharge in a device with water electrodes is studied in air by electrical method and emission spectroscopy. Results show that discharge can transit from filamentary mode to uniform mode by increasing the applied voltage or decreasing the gas pressure. The discharge mechanism at high pressure is the streamer and that at low pressure is glow discharge. The relations of the number of high-energy electons and experimental parameters were studied by optical emission spectroscopy. The results show that high-energy electrons increases in number with decreasing gas pressure and decreases with increasing applied voltage. The experimental results are explained qualitatively based on the theory of wall charge. The results are of value for the study of uniform discharge in dielectric barrier discharge.

关 键 词：介质阻挡放电 光学发射谱 微放电丝 均匀放电模式 

分 类 号：O461.2[理学—电子物理学]