Abstract
The fast frequency change or chirping of core-localized toroidicity-induced Alfvén eigenmodes (C-TAE), excited before giant sawteeth during ion cyclotron resonance heating, has been investigated. The chirping can be accounted for by small changes of the central q profile. When the C-TAE crosses the frequency of a global TAE (G-TAE) a small frequency gap was found. These gaps can be attributed to mode coupling between the C-TAE and a G-TAE which is observed for the first time. The coupling and the frequency gaps are consistent with linear TAE mode coupling.
| Original language | American English |
|---|---|
| Pages (from-to) | 2961-2964 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 82 |
| Issue number | 15 |
| DOIs | |
| State | Published - 1999 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy