摘要
为了丰富介质阻挡放电系统中斑图的多样性,利用双水电极介质阻挡放电装置,在空气和氩气按一定比例混合的气体中(氩气含量χ=25%),发现了带晕蜂窝六边形斑图。通过观察用普通相机拍摄的斑图照片,可以发现斑图是由中心点、晕和蜂窝框架构成,且中心点位于晕的中心,中心点和晕嵌套在蜂窝框架的中心。采用带有3个通道的高速照相机对斑图进行分脉冲瞬态拍摄,结果显示带晕蜂窝六边形斑图的3套子结构在外加电压的半周期内,总是按照晕-蜂窝框架-中心点这样的顺序放电。运用光电倍增管对这3套子结构进行研究,发现晕的放电在时间和空间上具有局部选择性。利用发射光谱法,根据氮分子第二正带系(C^3Π_u→B^3Π_g)谱线计算了中心点、晕和蜂窝框架的分子振动温度,结果显示:中心点的分子振动温度为2 632 K,晕的分子振动温度为2 679 K,蜂窝框架的分子振动温度为2 720 K。本文利用壁电荷理论解释带晕蜂窝六边形斑图的形成机制和时空结构。
In order to enrich the diversity of patterns in dielectric barrier discharge system,two water electrodes were used as a device in dielectric barrier discharge system.The whole cell is placed into a big chamber which contains a mixture gas of argon and air inside(argon contentχ=25%).We found the honeycomb hexagon pattern with halo firstly.The pattern taken by an ordinary camera was composed of center spots,halos,and honeycomb framework.Center spots were located at the center of the halos,and the two previous structures were located at the center of the honeycomb framework.The spatio-temporal structure of pattern can be investigated by an intensifed charge-coupled device(ICCD)camera with three-channel.Results show that the discharge sequence of the honeycomb hexagon pattern with halo is halos-honeycomb framework-central spots in each half voltage cycle.The spatio-temporal structure of the pattern can be investigated with photomultipliers(PMT).Results show that the discharge of halo is locally selective in time and space.The molecular vibrational temperatures of three sub-lattices are calculated using the spectral lines of the N 2 second position band(C 3Πu→B 3Πg).Results show that the molecular vibrational temperatures of the center spots are 2 632 K,the molecular vibrational temperatures of the halos are 2 679 K,the molecular vibrational temperatures of the honeycomb framework are 2 720 K.In this paper,the wall charge theory is used to explain the formation mechanism and spatio-temporal structure of honeycomb superlattice pattern with halo.
作者
于广林
董丽芳
窦亚亚
孙浩洋
米彦霖
YU Guang-lin;DONG Li-fang;DOU Ya-ya;SUN Hao-yang;MI Yan-lin(College of Physics Science and Technology,Hebei University,Baoding 071002,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2018年第11期1527-1532,共6页
Chinese Journal of Luminescence
基金
国家自然科学基金(11375051)
河北省应用基础研究计划重点基础研究项目(15961105D)
河北省教育厅科研基金(LJRC011)资助项目~~
