Abstract

A model of the low-current gas discharge at the presence of a thin insulating film on the cathode is formulated. It takes into account, along with the ion-electron emission from the cathode, also the field emission of electrons from the cathode metal substrate into the film under the influence of a strong electric field generated in insulator in the discharge. Motion of electrons in the film and their going out into the discharge volume is also calculated. The discharge parameters are found as functions of the discharge current density and it is shown that, unlike in the case of discharge with the metal cathode, the cathode effective secondary electron emission yield grows at its increase. As a result, the voltage-current characteristic of such discharge is falling, and this can be a cause of the experimentally observed its instability.

中文翻译：

---

带有绝缘膜的阴极的场电子发射对低电流气体放电的电压-电流特性和稳定性的影响的建模

摘要

建立了在阴极上存在薄绝缘膜时的低电流气体放电模型。在放电中，在绝缘子中产生的强电场的影响下，它还考虑了与来自阴极的离子电子发射以及从阴极金属基板进入薄膜的电子场发射。还计算了薄膜中电子的运动以及电子进入放电体积的过程。发现放电参数是放电电流密度的函数，并且显示出，与用金属阴极放电的情况不同，阴极有效二次电子发射产率随着其增加而增加。结果，这种放电的电压-电流特性下降，这可能是通过实验观察到其不稳定性的原因。