光学方法研究介质阻挡放电上行区的放电特性  

Optical Investigation on the Discharge Characteristics of the Upstream Region in Dielectric Barrier Discharge

作　　者：李雪辰[1] 常媛媛[1] 许龙飞[1] 

机构地区：[1]河北大学物理科学与技术学院河北省光电信息材料重点实验室,河北保定071002

出　　处：《光学学报》2013年第7期306-310,共5页Acta Optica Sinica

基　　金：国家自然科学基金资助项目(10805013;51077035);教育部科技研究重点项目(210014);河北省杰出青年基金项目(J201200167);河北省自然科学基金资助项目(A2011201132;A2009000149);河北省教育厅优秀青年项目(Y2011120);河北大学杰出青年基金(2010-J02)

摘　　要：利用同轴介质阻挡放电装置,在大气压流动气体(氩气和痕量的空气)中放电从而在气流上行区产生了稳定的长达几十厘米的等离子体。利用光学方法研究发现该上行区等离子体以发光子弹模式传播,其传播运行速度约为0.8×105 m/s,表明介质阻挡放电上行区的放电机制为流光放电。利用斯塔克展宽计算上行区等离子体电子密度为1015 cm-3量级。利用玻尔兹曼斜线方法计算了上行区的电子激发温度,发现上行区电子激发温度随外加电压峰值的增加而增加。A plasma column with length of several decimeters is generated in the upstream region of flowing gas （argon and trace air）at atmospheric pressure by using dielectric barrier discharge device in coaxial configurations. The discharge mechanism of the plasma column is investigated by optical method. The result indicates that a moving layer of light emission propagates in the upstream region, which behaves like a plasma bullet with a velocity of about 0.8×10^5 m/s. It indicates that streamer breakdown mechanism is involved in the upstream discharge. Electron density in the order of 10^15 cm^-3 is also obtained by Stark broadening. Electron excited temperature can be calculated by Boltzmann plot. The results show that the excited electron temperature in the upstream region increases with the increasing of the peak value of the applied voltage.

关 键 词：大气光学 介质阻挡放电 上行区 发射光谱 电子激发温度 

分 类 号：O433.4[机械工程—光学工程]