| Autor: |
J. Dutton, R. W. Crompton, S. C. Haydon |
| Rok vydání: |
1956 |
| Předmět: |
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| Zdroj: |
Applied Scientific Research, Section B. 5:43-46 |
| ISSN: |
0365-7140 |
| DOI: |
10.1007/bf02933258 |
| Popis: |
The elucidation of the mechanism of the electrical breakdown of gases in static uniform fields at high values of the parameter pd (p = pressure, d = gap distance) greater than about 200 mm Hg cm is a problem which has aroused great interest over a number of years. The problem may be conveniently considered in two parts. Firstly, it is necessary to explain in terms of fundamental physical processes why at a certain minimum critical voltage (called the breakdown potential Vs) a gas ceases to be a good insulator and can become a good conductor, and to set up a criterion which may be used to predict this breakdown potential when the electrical properties of the gas are known. Secondly, it is necessary to consider how the ionization current in the gas increases to its final glow or arc discharge value when a voltage equal to or greater than Vs is applied to a gap 1). The present paper is concerned exclusively with the mechanism which determines the static breakdown potential V s. In particular, it was necessary to determine whether the breakdown criterion is set by sudden space charge-controlled processes or by the continuous growth of ionization by primary and secondary processes in a uniform field. Experiments 2)~) have now shown that for gaps of lengths up to and including 1 cm in the atmosphere the breakdown criterion is the same as that operative at low values of pd |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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