| Автор | H Ehmler |
| Автор | J Baldzuhn |
| Автор | K McCormick |
| Автор | A Kreter |
| Автор | T Klinger |
| Автор | W7-AS Team |
| Дата выпуска | 2003-01-01 |
| dc.description | Combined measurements of ion density, temperature and poloidal rotation of impurity ions have been carried out in the gradient region of the Wendelstein 7-AS plasma, employing charge-exchange spectroscopy with the high-energy neutral Li beam and C<sup>6+</sup>/C<sup>5+</sup> ions. The present state of the experimental technique is described. Results are obtained in discharges with high central ion temperatures of 1.3 keV, central electron densities of 7×10<sup>19</sup> m<sup>−3</sup>. Under these conditions the diagnostic covers a region of about 7 cm radial extent, corresponding to ion temperatures between 50 and 800 eV. Poloidal rotation velocities up to (35±2.5) km s<sup>−1</sup> were measured in a narrow shear layer at the plasma edge. The contribution of ion diamagnetic and E×B drift is discussed. The radial electric field is derived from a simplified radial force balance equation. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Charge-exchange spectroscopy at the W7-AS stellarator employing a high-energy Li beam |
| Тип | paper |
| DOI | 10.1088/0741-3335/45/1/304 |
| Electronic ISSN | 1361-6587 |
| Print ISSN | 0741-3335 |
| Журнал | Plasma Physics and Controlled Fusion |
| Том | 45 |
| Первая страница | 53 |
| Последняя страница | 62 |
| Выпуск | 1 |
