| Автор | A Bouwknegt |
| Автор | A G Van Der Kooi |
| Дата выпуска | 1976-05-11 |
| dc.description | The thermionic emission of a flat oxide cathode in a 3 torr argon DC discharge has been determined in the regime of moderate ion bombardment; that is, with relative ion currents of up to 15%. The electrode temperatures were about 1000K, the current densities were up to 2.5 A cm<sup>-2</sup>. The work-function phi <sub>0</sub> and the Richardson constant A<sub>R</sub>, depend on the discharge current density j. At low discharge currents the electron current density at zero electric field at the cathode surface, j<sub>0</sub>=A<sub>R</sub>exp(-e phi <sub>0</sub>/kT), is related to j as j<sub>0</sub> approximately=<sup>1</sup>/<sub>2</sub>j, and depends only sightly on the cathode temperature. The ion bombardment appears to activate the cathode in the gas discharge, and j<sub>0</sub> increases with higher discharge currents up to a temperature-dependent maximum j<sub>0</sub>-value. This activation is reversible, which indicates a competing deactivation process at the cathode surface in the gas discharge. Still further increase of the discharge current leads to erosion of the cathode. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Thermionic emission of an oxide cathode in a low-pressure gas discharge |
| Тип | paper |
| DOI | 10.1088/0022-3727/9/7/002 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 9 |
| Первая страница | 1111 |
| Последняя страница | 1121 |
| Аффилиация | A Bouwknegt; Philips Gloeilampenfabrieken, Light Div., Eindhoven, Netherlands |
| Аффилиация | A G Van Der Kooi; Philips Gloeilampenfabrieken, Light Div., Eindhoven, Netherlands |
| Выпуск | 7 |
