| Автор | P C Thonemann |
| Автор | W T Cowhig |
| Дата выпуска | 1951-04-01 |
| dc.description | It is shown that the self magnetic field of a high current discharge plays an important part in determining the radial electron density distribution The effect of this magnetic field can be treated by adding a `magnetic potential' term V<sub>m</sub>=f<sup>r</sup><sub>0</sub>wH dr to the electrostatic potential V<sub>s</sub> in the Boltzmann equation for the radial electron density distribution, w being the longitudinal electron drift velocity. The drift of electrons and ions to the tube walls is equalized at low arc currents by a radial electric field. Since the magnetic feld reduces the drift of electrons to the wall whilst having little influence upon the ions, increasing the arc current leads to a progressive reduction of the radial electric field Probe measurements in an arc at low pressures show that at currents over 50 amperes, the radial electric field is zero except for a narrow sheath at the wall The axial density is then mainly determined by the self magnetic field A theoretical expression is derived for the equilibrium density distribution assuming a balance between the diffusion rates due to the concentration gradient and the magnetic forces. Experiments in a mercury vapour arc at high currents support this theory |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The Role of the Self Magnetic Field in High Current Gas Discharges |
| Тип | paper |
| DOI | 10.1088/0370-1301/64/4/308 |
| Print ISSN | 0370-1301 |
| Журнал | Proceedings of the Physical Society. Section B |
| Том | 64 |
| Первая страница | 345 |
| Последняя страница | 354 |
| Аффилиация | P C Thonemann; Clarendon Laboratory, Oxford |
| Аффилиация | W T Cowhig; Clarendon Laboratory, Oxford |
| Выпуск | 4 |
