论文部分内容阅读
简述1种测试气体放电着火电压的方法,通过实验分析得出着火电压(U_g)与极间距离(d)、压强(P)关系:在其他条件不变时着火电压U_g是P与d乘积的函数。考察辉光放电过程中的特殊外形与极间距离、压强之间的关系以及辉光放电阴极区在气体放电过程中的重要性,辉光放电是1种高电压小电流的放电。这一特征是由阴极发射电子的机理决定的。由于r过程(正离子轰击阴极表面时使阴极产生的次级电子发射称为r过程)产生电子不很有效,所以必须有很高的阴极位降才能得到很小的电流密度。
A method for testing the ignition voltage of gas discharge is briefly described. The relationship between ignition voltage (U_g) and distance between electrodes (d) and pressure (P) is obtained through experimental analysis. The ignition voltage U_g is the product of P and d The function. The relationship between the special shape of the glow discharge and the distance between electrodes, the pressure and the importance of the glow discharge cathode region in the gas discharge process are investigated. Glow discharge is a kind of discharge with high voltage and low current. This feature is determined by the mechanism of cathodoluminescence. Since the electron generation is not very efficient due to the r process (the secondary electron emission produced by the cathode when the positive ions bombard the cathode surface is called the r process), a very high cathode potential drop is required to achieve very small current densities.