| Автор | V.V. Chechkin |
| Автор | V.S. Voitsenya |
| Автор | T. Mizuuchi |
| Автор | H. Zushi |
| Автор | K. Nagasaki |
| Автор | M. Nakasuga |
| Автор | H. Okada |
| Автор | S. Besshou |
| Автор | A. Hayakawa |
| Автор | H. Funaba |
| Автор | T. Hamada |
| Автор | K. Kondo |
| Автор | F. Sano |
| Автор | T. Obiki |
| Автор | E.L. Sorokovoj |
| Автор | S. Masuzaki |
| Автор | O. Motojima |
| Дата выпуска | 2000-04-01 |
| dc.description | In the l = 2/m = 19 Heliotron E heliotron/torsatron device, with a currentless plasma heated by NBI and ECH, the poloidal distributions were measured of diverted plasma flows near the vacuum chamber wall in eight sections of one helical field pitch. A vertical asymmetry of these distributions was observed, contrary to what had been expected from the helical symmetry of the `ideal' (unperturbed) vacuum divertor magnetic configuration. Under NBI conditions, the density normalized divertor plasma flow J<sub>d</sub>/n̅<sub>e</sub> was a rising function of the density normalized absorbed power P<sub>abs</sub>/n̅<sub>e</sub>. This is considered to be a consequence of the power degradation of confinement. With second harmonic ECH, where the main part of the launched power was absorbed in the central region, a similar power dependence as for the NBI was observed. With fundamental ECH, where a considerable fraction of the microwave power was absorbed at the periphery, J<sub>d</sub>/n̅<sub>e</sub> for some areas of the divertor trace distinctly exceeded those obtained under NBI-only conditions with the same P<sub>abs</sub>/n̅<sub>e</sub>. On the other hand, two different time responses (fast and slow) of J<sub>d</sub> were observed for the perpendicular NBI and fundamental ECH cases in some particular positions. The slow response is considered to be caused by a diffusion-like outflow of the bulk plasma to the divertor. The fast outflow of particles to the divertor might be caused by a loss of locally trapped high energy electrons and ions. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Main divertor flows in Heliotron E: their distribution and dependence on NBI and ECH |
| Тип | paper |
| DOI | 10.1088/0029-5515/40/4/304 |
| Electronic ISSN | 1741-4326 |
| Print ISSN | 0029-5515 |
| Журнал | Nuclear Fusion |
| Том | 40 |
| Первая страница | 785 |
| Последняя страница | 797 |
| Аффилиация | V.V. Chechkin; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | V.S. Voitsenya; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | T. Mizuuchi; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | H. Zushi; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | K. Nagasaki; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | M. Nakasuga; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | H. Okada; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | S. Besshou; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | A. Hayakawa; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | H. Funaba; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | T. Hamada; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | K. Kondo; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | F. Sano; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | T. Obiki; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | E.L. Sorokovoj; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | S. Masuzaki; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Аффилиация | O. Motojima; Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan |
| Выпуск | 4 |
