外磁场中的DC真空击穿
DC vacuum breakdown in an external magnetic field
摘要：
目前的理论和实验研究的主题是外部磁场感应对暗电流的影响和击穿的可能性。Fowler-Nordheim方程的推广使得可以考虑平行于阴极表面的磁场对场发射电流的影响。理论预测了由于电子碰撞电离的增加而导致的击穿电压的降低。实验表明，对于几乎所有阴极，无论其表面处理如何，约为截止磁场十分之一的磁场[18]的存在都会使击穿电压降低10%至20%。
英文摘要：
The subject of the present theoretical and experimental investigations is the effect of the external magnetic field induction on dark current and a possibility of breakdown. The generalization of the Fowler-Nordheim equation makes it possible to take into account the influence of a magnetic field parallel to the cathode surface on the field emission current. The reduction in the breakdown voltage due to the increment in electron-impact ionization was theoretical predicted. Experimentally shown that the presence of a magnetic field about a tenth as a large as the cutoff magnetic field [18] reduces the breakdown voltage by 10% to 20% for practically all cathodes no matter what their surface treatment.
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