This paper presents the results of experiments in gaseous helium, in point cathode-plane geometry, for a wide range of densities (3.10/sup 19/-2.10/sup 21/) cm/sup -3/. A current instability occurs at a threshold voltage V/sub S/. For V展开▼
机译：本文介绍了在点状阴极平面几何形状下气态氦的实验结果，其密度范围很广（3.10 / sup 19 / -2.10 / sup 21 /）cm / sup -3 /。在阈值电压V / sub S /处发生电流不稳定性。对于V 展开▼
