1966
DOI: 10.1088/0508-3443/17/7/308
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Townsend's first ionization coefficient for methane and nitrogen

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Cited by 50 publications
(20 citation statements)
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“…This had no effect on V s , and indeed there was no evident relationship between the magnitude of the steadyemission current and the onset of breakdown. A uniform 10~4mm-thick oxide layer on copper and nickel electrodes enabled fields of 30 MV/m to be used in compressed methane without any emission current, 12 and an insulating film on the electrodes reduced the emission current by four orders of magnitude. 37 It is important to remember that all the current need not necessarily be due to electron emission, as the movement of charged particles such as dust can produce a noticeable current (see Section 2.1.7).…”
Section: Prebreakdown Phenomenamentioning
confidence: 99%
“…This had no effect on V s , and indeed there was no evident relationship between the magnitude of the steadyemission current and the onset of breakdown. A uniform 10~4mm-thick oxide layer on copper and nickel electrodes enabled fields of 30 MV/m to be used in compressed methane without any emission current, 12 and an insulating film on the electrodes reduced the emission current by four orders of magnitude. 37 It is important to remember that all the current need not necessarily be due to electron emission, as the movement of charged particles such as dust can produce a noticeable current (see Section 2.1.7).…”
Section: Prebreakdown Phenomenamentioning
confidence: 99%
“…É curioso que tenha sido observado o contrário no caso da velocidade de deriva. No caso do coeficiente de ionização, tanto os resultados experimentais quanto os da literatura, como os resultados de Haydon [15] e Cookson et al (1966) [70], parecem indicar que os resultados do Magboltz estão superestimados.…”
Section: Resultados Combinados -Nunclassified
“…Os outros dois trabalhos dos quais foram extraídos o coeficiente de ionização para fazer a comparação, [69,70], também propõem algum método para separar o efeito das emissões secundárias no cátodo das emissões primárias. Daniel e Harris [69] fizeram o ajuste dos seus resultados utilizando uma expressão mais geral da taxa de ionização em função da separação d, que leva em conta o coeficiente de emissão secundária [14].…”
Section: Resultados Combinados -Nunclassified
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