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大气压介质阻挡放电超四边形斑图的等离子体参量
引用本文:陈俊英,董丽芳,李媛媛,宋倩,嵇亚飞.大气压介质阻挡放电超四边形斑图的等离子体参量[J].物理学报,2012,61(7):75211-075211.
作者姓名:陈俊英  董丽芳  李媛媛  宋倩  嵇亚飞
作者单位:河北大学物理科学与技术学院, 保定 071002
基金项目:国家自然科学基金(批准号: 10975043),河北省自然科学基金(批准号: 2010000185),河北省教育厅重点项目(批准号: ZD2010140)和 2010年度高等学校博士学科点专项科研基金资助课题(批准号: 20101301110001)资助的课题.
摘    要:本工作利用双水电极介质阻挡放电装置,采用发射光谱方法,在大气压氩气介质阻挡放电中研究了由不同空间尺度 微放电通道构成的超四边形斑图的等离子体参量.实验发现直径较大的微放电通道(大点)和直径较小的微放电通道(小点)亮度不同.采用氮分子第二正带系谱线计算了分子振动温度,利用谱线强度比方法得到了电子激发温度,用氩原子696.54 nm谱线的Stark展宽估算了电子密度.结果显示小点的电子密度和分子振动温度均高于大点,而电子激发温度低于大点.这说明稳定超四边形斑图中不同尺度微放电的等离子体状态不同.

关 键 词:介质阻挡放电  超四边形斑图  等离子体参量
收稿时间:2011-05-25

Plasma parameters of square superlattice pattern in a dielectric barrier discharge
Chen Jun-Ying,Dong Li-Fang,Li Yuan-Yuan,Song Qian,Ji Ya-Fei.Plasma parameters of square superlattice pattern in a dielectric barrier discharge[J].Acta Physica Sinica,2012,61(7):75211-075211.
Authors:Chen Jun-Ying  Dong Li-Fang  Li Yuan-Yuan  Song Qian  Ji Ya-Fei
Institution:College of Physics Science and Technology , Hebei University, Baoding 071002, China
Abstract:Dielectric barrier discharge is an important method of producing nonequilibrium low-temperature plasma. Measurement of the plasma parameters is highly valuable for its industrial application. Plasma parameters of square superlattice pattern are investigated by optical emission spectroscopy in a dielectric barrier discharge by using a two-liquid-electrode dielectric barrier discharge device in argon at atmospheric pressure. It is found that the light intensity of the large diameter microdischarge channel(big dot) is different from that of the small diameter channel (small dot). Vibrational temperature is investigated by using the N_{2} second positive spectrum. Electronic excitation temperature is measured by means of spectral line intensity ratio. Electron density is obtained by using the stark broadening of Ar atom 696.54 nm spectral line. The results show that the electron density and the vibrational temperature of the small dot are larger than those of the big dot but the electronic excitation temperature is lower than that of the big dot. It is suggested that the plasma state of the big dot is different from that of the small dot in the stable square superlattice pattern.
Keywords:dielectric barrier discharge  square superlattice pattern  plasma parameter
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