2013年7月
Mitigation of NBI-driven Alfven eigenmodes by electron cyclotron heating in the TJ-II stellarator
NUCLEAR FUSION
- 巻
- 53
- 号
- 7
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1088/0029-5515/53/7/072004
- 出版者・発行元
- IOP PUBLISHING LTD
Alfven eigenmode (AE) activity driven by NBI-produced fast ions is observed in TJ-II plasmas. A two-step response of the measured AEs to electron cyclotron heating (ECH) power is seen. In a first step, the continuous character of the unstable AEs changes to a chirping character of the marginally unstable AEs when moderate values of ECH power are applied to the NBI-only-heated plasma. In a second step, a significant reduction of the AE amplitude is observed when the ECH power is doubled. This stabilizing effect has been experimentally confirmed both on a shot-by-shot basis and along a single discharge by means of ECH modulation. The observed stabilizing effect is stronger with on-axis ECH than with off-axis ECH power injection.
- リンク情報
- ID情報
-
- DOI : 10.1088/0029-5515/53/7/072004
- ISSN : 0029-5515
- Web of Science ID : WOS:000321780500004