| Автор | Katsuji Ichiguchi |
| Дата выпуска | 1997-11-01 |
| dc.description | The Mercier stability of the plasmas carrying bootstrap currents with different plasma collisionality is studied in the Large Helical Device (LHD). In the LHD configuration, the direction of the bootstrap current depends on the collisionality of the plasma through the change in the sign of the geometrical factor. When the beta value is raised by increasing the density of the plasma with a fixed low temperature, the plasma becomes more collisional and the collisionality approaches the plateau regime. In this case, the bootstrap current can flow in the direction so as to decrease the rotational transform. Then, the large Shafranov shift enhances the magnetic well and the magnetic shear, and therefore, the Mercier stability is improved. On the other hand, when the beta value is raised by increasing the temperature of the plasma with a fixed low density, the plasma collisionality becomes reduced to enter the collisionality regime. In this case, the bootstrap current flows so that the rotational transform should be increased, which is unfavourable for the Mercier stability. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Collisionality dependence of Mercier stability in LHD equilibria with bootstrap currents |
| Тип | paper |
| DOI | 10.1088/0741-3335/39/11/004 |
| Electronic ISSN | 1361-6587 |
| Print ISSN | 0741-3335 |
| Журнал | Plasma Physics and Controlled Fusion |
| Том | 39 |
| Первая страница | 1805 |
| Последняя страница | 1816 |
| Аффилиация | Katsuji Ichiguchi; National Institute for Fusion Science, Oroshi-cho 322-6, Toki 509-52, Japan |
| Выпуск | 11 |
