2013年11月
Stabilization of energetic-ion-driven MHD modes by ECCD in Heliotron J
NUCLEAR FUSION
- 巻
- 53
- 号
- 11
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/0029-5515/53/11/113041
- 出版者・発行元
- IOP PUBLISHING LTD
Second harmonic electron cyclotron current drive (ECCD) has been applied in the stellarator/heliotron (S/H) device, Heliotron J, to stabilize magnetohydrodynamic (MHD) modes. The energetic particle mode (EPM) of 60-90 kHz frequency, one of the energetic-ion-driven MHD modes, is excited in a plasma heated by co- and counter-neutral beam injection and electron cyclotron heating (ECH). The EPM has been stabilized by counter-ECCD which decreases the rotational transform. Localized EC current driven by a few kA at the central region modifies the rotational transform profile, iota/2 pi, leading to the formation of a high magnetic shear at the radius where the mode is excited. An experiment scanning the EC-driven current shows that there is a threshold in magnetic shear and/or rotational transform to stabilize the EPM.
- リンク情報
- ID情報
-
- DOI : 10.1088/0029-5515/53/11/113041
- ISSN : 0029-5515
- eISSN : 1741-4326
- Web of Science ID : WOS:000326684400042