【作者】 何寿杰； 刘淑敏； 刘志强； 董丽芳；

【Author】 HE Shou-jie;LIU Shu-min;LIU Zhi-qiang;DONG Li-fang;College of Physics Science and Technology,Hebei University;

【机构】 河北大学物理科学与技术学院；

【摘要】 为了进一步揭示槽型空心阴极放电的放电机理,利用流体-亚稳态原子传输模型模拟研究了槽型空心阴极放电等离子体参数的时空分布特性。模拟得到了不同时刻槽型空心阴极放电中电势、电子密度、电场和电离速率等的分布特性。结果表明槽型空心阴极放电在不同时刻处于不同的放电模式。初始放电阶段为汤生放电模式,此阶段以轴向放电为主;第二阶段为放电由槽外向槽内发展阶段,此阶段电场由轴向向径向转换;第三阶段为形成空心阴极效应放电模式阶段,此阶段逐渐形成稳定的阴极鞘层结构;第四阶段为稳定放电阶段,放电参数不随时间发生变化。更多还原

【Abstract】 In order to explore the discharge mechanism of a slotted hollow cathode discharge,the temporal and spatial plasma parameters for slotted hollow cathode discharge are investigated by using fluid-metastable atomic transport model.The electric potential,electron density,electric field,and ionization rate are calculated.The results show that different modes for the slotted hollow cathode discharge appear at different time.The first stage is the Townsend discharge mode,mainly axial discharge.The second stage is the discharge from the outside to the inside of the cavity,which shows a transition from axial electric field to radial electric field.The third stage is the formation of hollow cathode discharge mode,and the cathode sheath layer is formed gradually.The last is the stable discharge stage,the plasma parameters do not change with time in this stage.更多还原