Progress of ECRH by EBW in over-dense plasmas and controlling the confinement regime by ECCD with high power launching in LHD

被引：4

作者：

Igami, H. ^{[1
]}

Yoshimura, Y. ^{[1
]}

Takahashi, H. ^{[1
]}

Shimozuma, T. ^{[1
]}

Kubo, S. ^{[1
]}

Idei, H. ^{[2
]}

Nishiura, M. ^{[1
]}

Ogasawara, S. ^{[3
]}

Makino, R. ^{[3
]}

Ohdachi, S. ^{[1
]}

Ida, K. ^{[1
]}

Yoshinuma, M. ^{[1
]}

Ido, T. ^{[1
]}

Shimizu, A. ^{[1
]}

Tamura, N. ^{[1
]}

Inagaki, S. ^{[1
]}

Mutoh, T. ^{[1
]}

机构：

[1] Natl Inst Fus, Res Inst, Toki, Gifu, Japan

[2] Res Inst Appl Mech, Fukuoka, Japan

[3] Nagoya Univ, Dept Energy & Technol, Nagoya, Aichi, Japan

来源：

EC-17 - 17TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING | 2012年 / 32卷

关键词：

D O I：

10.1051/epjconf/20123202006

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In the large helical device (LHD), fundamental electron cyclotron resonance heating (ECRH) by the electron Bernstein wave (EBW) excited via the ordinaryextraordinary- EBW (O-X-B) mode conversion process was performed with high power (similar to 1MW) launching. Profiles of increase of the electron temperature (Te) and the soft Xray signals during the power injection suggest power absorption in the core region. Effects of the local modification of the rotational transform./2p(= 1/q) by electron cyclotron current drive (ECCD) on the formation and sustainment of the electron internal transport barrier (e-ITB) was investigated for the first time. Co ECCD raised./2p close to 0.5 in the core region and caused the flattening of the Te profile. Additional ECRH power is required to form the e-ITB. On the contrary, counter (cntr.) ECCD separates./2p from 0.5 in the core region and avoids the flattening of the Te profile. The e-ITB can be formed and sustained without additional ECRH. Analysis of the heat pulse transport with use of the modulation ECRH (MECH) shows the good confinement region extends to the./2p = 0.5 rational surface in the case of cntr. ECCD.

引用

页数：7