| Автор | F E Irons |
| Автор | W R Ellis |
| Автор | A A Newton |
| Дата выпуска | 1972-07-01 |
| dc.description | Investigations of plasma produced by a pulsed current of 40 kA peak and 20 mu s decay time in a quartz torus of major radius 32 cm and minor radius 4 cm in 30 mtorr of hydrogen are described. The electron temperature rose in 1 mu s to approximately 4*10<sup>4</sup>K and relaxed by 4 mu s to a value of approximately 2*10<sup>4</sup>K for most of the 50 mu s duration of the current pulse. Corresponding electron densities were 3*10<sup>15</sup> cm<sup>-3</sup>, falling to a nearly steady value of 1.5*10<sup>15</sup> cm<sup>-3</sup>. At later times the afterglow is followed to 8*10<sup>13</sup> cm<sup>-3</sup> at 180 mu s. Dissipation of the toroidal current provides 15 to 20 times the energy required for full ionisation, and temperature equilibrium results from atom thermal conduction loss to the wall. Although these losses can be intrinsic, the observed asymmetries in luminosity and magnetic field show that MHD instability is present which enhances the wall contact. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Spectroscopic study and energy balance of pulsed toroidal discharges |
| Тип | paper |
| DOI | 10.1088/0032-1028/14/7/006 |
| Print ISSN | 0032-1028 |
| Журнал | Plasma Physics |
| Том | 14 |
| Первая страница | 717 |
| Последняя страница | 728 |
| Аффилиация | F E Irons; UKAEA, Abingdon, UK |
| Аффилиация | W R Ellis; UKAEA, Abingdon, UK |
| Аффилиация | A A Newton; UKAEA, Abingdon, UK |
| Выпуск | 7 |
