真空中聚乙烯膜在纳秒脉冲电压下的沿面闪络特性

 在高功率离子束二极管中，当利用阳极膜沿面闪络产生的等离子体作为离子束引出源时，其特性对产生离子束的大小和品质有着很大的影响，因此要深入研究阳极膜的沿面闪络特性。主要介绍了所研制的一套适用于沿面闪络特性研究的实验装置和测量诊断系统。对离子束二极管中使用的三种厚度聚乙烯薄膜在脉冲电压下的沿面闪络特性进行了实验研究，并对沿面闪络过程中薄膜表面的发光现象作了初步的诊断。

Surface flashover characteristics of polyethylene film under ns impulse voltage in vacuum

Surface flashover of insulators is widely applied in pulsed power technique. In the ion diode, polyethylene (PE) film is often used as anode foil, for it's abounding in hydrogen. As a flashover ion source, the formation of anode plasma influences the quantity and quality of ion beam seriously. A set of apparatus for studying flashover behavior of PE film in vacuum and it's measurement system were developed. The experiment results of three PE films with difference thickness under impulse voltage of about 100 kV, 40 ns were presented. For the 90 and 65μm PE films, if the maximal electric field be up to 150.5 kV/cm and 145.3 kV/cm respectively, flashover will occur. The luminescence phenomenon of film surface was also studied preliminarily.