| Автор | H Rosenthal |
| Автор | I Beilis |
| Автор | S Goldsmith |
| Автор | R L Boxman |
| Дата выпуска | 1995-02-14 |
| dc.description | Heat transfer to a thermally isolated graphite anode in a long duration vacuum arc was investigated. The anode bulk temperature was measured as a function of time using two high-temperature thermocouples. The anode surface temperature was optically determined. The visual image of the arc was detected with the same optical system. A surface temperature of 2300 K was obtained in a 340 A arc. A one-dimensional nonlinear heat flow model for the anode was developed. A solution was obtained using a dynamic numerical method and the time-dependent effective anode potential (defined as the ratio between the input power to the anode and the arc current) was determined to decrease from a value of 10, 12 V at t=0 to approximately 6.3 V at steady state observed for t>or=100, 60 s, for arc currents of 175 and 340 A respectively. Input power to the anode decreased on a timescale approximately coinciding with the appearance of an anodic plume which developed during the arcing. The effective potential of the water-cooled copper cathode (defined as the ratio between the net input power to the cathode and the arc current) was determined to rise from 6.6 V near the beginning of the arc to 7.2 V during steady state. The total arc voltage, measured between the electrodes, increased from a value of approximately 21 V to a steady state value of 24, 26 V for arc currents of 175 and 340 A respectively. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Heat fluxes during the development of a hot anode vacuum arc |
| Тип | paper |
| DOI | 10.1088/0022-3727/28/2/019 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 28 |
| Первая страница | 353 |
| Последняя страница | 363 |
| Аффилиация | H Rosenthal; Electr. Discharge & Plasma Lab., Tel Aviv Univ., Israel |
| Аффилиация | I Beilis; Electr. Discharge & Plasma Lab., Tel Aviv Univ., Israel |
| Аффилиация | S Goldsmith; Electr. Discharge & Plasma Lab., Tel Aviv Univ., Israel |
| Аффилиация | R L Boxman; Electr. Discharge & Plasma Lab., Tel Aviv Univ., Israel |
| Выпуск | 2 |
