DEPARTURE FROM PASCHENS LAW OF BREAKDOWN IN GASES
DEPARTURE FROM PASCHENS LAW OF BREAKDOWN IN GASES
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DOI：
10.1103/physrev.97.255
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发表时间：
1955-01-01
期刊：
影响因子：
--
通讯作者：
KISLIUK, P
中科院分区：
文献类型：
--
作者：
BOYLE, WS;KISLIUK, P
本文用一种单一的击穿机理解释了在高压和极小的电极间距下气体击穿的帕邢定律的失效。在每种情况下，击穿场都足够大，可以从阴极获得可测量的场发射电流，从而产生相对较少的离子。这些离子的空间电荷场足够大，即使当离子电流与电子电流的比率小于1%时，也能显著地增加场发射电流。随着产生更多的离子空间电荷，每个离子在增强电子电流方面变得更有效，直到达到击穿条件。导出了每个正离子的电子产率作为所施加的电场的函数的表达式。这个表达式被证明是在定量协议的γ值来自公开的数据在高压下的击穿电压。它还表明，相同的过程解释击穿在极小的分离低于“最小火花电位。"
The failure of Paschen's law of electrical breakdown in gases at both high pressures and extremely small electrode separations is explained by a single breakdown mechanism. The breakdown field in each of these cases is sufficiently great to draw measurable field-emission current from the cathode, which produces a relatively small number of ions. The space-charge field of these ions is great enough to increase the field-emission current appreciably even when the ratio of ion current to electron current is less than one percent. As more ionic space charge is produced, each ion becomes more effective in enhancing the electron current until the breakdown condition is attained. An expression is derived for the yield of electrons per positive ion as a function of the applied field. This expression is shown to be in quantitative agreement with values of γ derived from published data on breakdown voltages at high pressures. It is shown also that the same process explains breakdown at extremely small separations below the" minimum sparking potential."