Speaker
Dr
xiaodi du
(National Institute for Fusion Science)
Description
A bursting resistive interchange mode destabilized by the resonant interaction with the helically trapped energetic ions (EIs), named as the helically trapped energetic-ion-driven resistive interchange modes, or ‘EIC’, has been identified in Large Helical Device (LHD). It can induce the significant loss of the EIs in plasma peripheral region. Therefore, the control of the EICs is important. It is found that when the electron-cyclotron-heating (ECH) near the magnetic axis is superimposed, the EIC locating in the plasma peripheral region is mitigated. The EIC can be further fully stabilized when the power of the ECH exceeds a certain threshold. The ratio of the gyro-radius of the trapped EIs to the radial width of the resistive interchange mode (k_r*rho_EI) is the key parameter to explain the observed stabilising effect. That is, the FLR effect is thought to play an important role on the observed stabilization of the EIC in LHD.
| Country or International Organization | Japan |
|---|---|
| Paper Number | EX/P8-12 |
Primary author
Dr
xiaodi du
(National Institute for Fusion Science)
Co-authors
Dr
Keisuke Fujii
(Graduate School of Engineering, Kyoto University)
Prof.
Kenichi Nagaoka
(National Institute for Fusion Science)
Dr
Kenji Tanaka
(National Institute for Fusion Science)
Dr
Kunihiro Ogawa
(National Institute for Fusion Science)
Prof.
Masaki Osakabe
(National Institute for Fusion Science)
Dr
Mitsutaka Isobe
(National Institute for Fusion Science)
Dr
Motoshi goto
(National Institute for Fusion Science)
Prof.
Satoru Sakakibara
(National Institute for Fusion Science)
Dr
Satoshi Ohdachi
(National Institute for Fusion Science)
Dr
TAKESHI IDO
(National Institute for Fusion Science)
Mr
Tetsuo Ozaki
(National Institute for Fusion Science)
Tetsuo Seki
(National Institute for Fusion Science)
Mr
Timothée Nicolas
(National Institute for Fusion Science)
Dr
Yasuhiro Suzuki
(National Institute for Fusion Science)
Dr
kiyomasa watanabe
(National Institute for fusion science)
Dr
seiya nishimura
(Kobe City College of Technology)
