| Автор | Y Kusama |
| Автор | G Y Fu |
| Автор | G J Kramer |
| Автор | M Saigusa |
| Автор | T Oikawa |
| Автор | T Ozeki |
| Автор | S Moriyama |
| Автор | F V Tchernychev |
| Автор | M Nemoto |
| Автор | T Kondoh |
| Автор | T Hatae |
| Автор | K Tobita |
| Автор | M Kuriyama |
| Автор | C Z Cheng |
| Автор | H Kimura |
| Дата выпуска | 1999-09-01 |
| dc.description | High-frequency modes in the 525-550 kHz range with toroidal mode numbers n = 3-7 were excited after the sawtooth crash during ion cyclotron range of frequency (ICRF) heating. Based on the stability analysis using the NOVA-K code, these modes were found to be consistent with ellipticity-induced Alfvén eigenmodes (EAEs) excited in the EAE gap located at the q = 1 surface. A change in the safety factor after the sawtooth crash was essential for the excitation of EAEs in the core region of the plasma. The high-frequency modes were stabilized by the neutral beam injection at 350 keV using negative-ion-based neutral beam (NNB) injectors. Stability analysis using the NOVA-K code has shown that NNB-injected ions enhance the damping of the EAEs and tend to stabilize them. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Destabilization of ellipticity-induced Alfvén eigenmodes during ICRF heating and stabilization by negative-ion-based neutral beam injection in JT-60U |
| Тип | paper |
| DOI | 10.1088/0741-3335/41/9/308 |
| Electronic ISSN | 1361-6587 |
| Print ISSN | 0741-3335 |
| Журнал | Plasma Physics and Controlled Fusion |
| Том | 41 |
| Первая страница | 1167 |
| Последняя страница | 1177 |
| Выпуск | 9 |
