| Автор | F Llewellyn Jones |
| Автор | D E Davies |
| Дата выпуска | 1951-06-01 |
| dc.description | The breakdown mechanism was investigated by examining the dependence of the shape of the cathode emission (ω/α, X/p) curves on the deposition of electro-positive or electro-negative atoms on cathodes of nickel, aluminium, silver, copper and molybdenum. X is the electric intensity, and p the gas pressure at about 15° C, and ω is the generalized secondary ionization coefficient which includes processes of cathode emission due to impact of positive ions, of excited atoms, and of photons generated in the ionization current; α is the primary ionization coefficient due to the electrons. Deposition of positive atoms on the cathode produced sharp photoelectric peaks in the curves in the region X/p ≃ 150 v./cm.mm. Hg, but ω/α was not greatly affected at higher values of X/p. These results are analysed in terms of the varying effective work function of the surface due to the deposition of atoms. It is concluded that the high photoelectric emission from cathodes of low effective work function was due to low-energy photons generated in the pre-breakdown currents, but that for clean metals the secondary emission was due to impact of positive ions; photo-emission due to any high-energy photons generated in the ionization currents was negligible in comparison. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Mechanism of Secondary Ionization in Low-Pressure Breakdown in Hydrogen |
| Тип | paper |
| DOI | 10.1088/0370-1301/64/6/308 |
| Print ISSN | 0370-1301 |
| Журнал | Proceedings of the Physical Society. Section B |
| Том | 64 |
| Первая страница | 519 |
| Последняя страница | 527 |
| Аффилиация | F Llewellyn Jones; Department of Physics, University College of Swansea |
| Аффилиация | D E Davies; Department of Physics, University College of Swansea |
| Выпуск | 6 |
