一种D_(2h)对称性放电气隙中气体放电斑图的研究  

Study on a gas discharge pattern with discharge gap of the D_(2h) symmetry

作　　者：刘彬彬 董丽芳[1] 米彦霖 刘富成[1] 范伟丽[1] LIU BinBin;DONG LiFang;MI YanLin;LIU FuCheng;FAN WeiLi(College of Physics Science and Technology,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《中国科学：物理学、力学、天文学》2018年第12期66-73,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金项目(编号:11375051);河北省教育厅项目(编号:LGRC001)资助

摘　　要：介质阻挡放电系统中首次在具有D_(2h)对称性放电气隙中获得斑图.该放电气隙是由4个条型结构组成,每个条型都是由圆形和矩形交替排列属于D_(2h)点群,在圆形与矩形的放电气隙双重调制下获得斑图的演化是从D_(4h)向D_(2h)的转变,并实现一种可调控的等离子体光子晶体.本实验对圆形区域内的放电行为进行研究.采用高速照相机对其时空结构进行测量,结果表明,斑图Ⅱ是由中心点、边框点、晕三套子结构相互嵌套而成,晕的形状呈环状.用高速录像机对环状的晕进行拍摄,可以观察到晕是由随机放电丝组成.采用光谱仪分别对不同子结构的等离子体参量进行测量.最后用壁电荷理论解释分析了斑图形成的机制以及环状晕形成的原因.The pattern with discharge gap of D2h symmetry is obtained in dielectric barrier discharge for the first time. The discharge gap belonged to D2h point group is consisted of four striped structures which is made up circles and rectangles. The evolution of the pattern with this discharge gap is from D4h to D2h through self-organization. The device also achieves a tunable plasma photonic crystal. The spatial-temporal structure in circular areas investigated by an intensified charge coupled device camera （ICCD） shows that it is an interleaving of three different suhlattices, which are central spots, spots on the boundary, circular halos, respectively. The circular halos investigated by a high-speed video camera show that the halos are randomly filaments. The plasma parameters of different sublattices are studied by a spectrograph. The formation mechanisms of the pattern and the circular halos are analyzed by wall charges theory.

关 键 词：介质阻挡放电 对称性 斑图 时空结构 壁电荷 

分 类 号：O461[理学—电子物理学]