Current profile control and improvement of current drive efficiency by combined lower hybrid waves in TRIAM-1M

被引：12

作者：

Sakamoto, M ^{[1
]}

Itoh, S ^{[1
]}

Sato, KN ^{[1
]}

Nakamura, K ^{[1
]}

Zushi, H ^{[1
]}

Hanada, K ^{[1
]}

Jotaki, E ^{[1
]}

Makino, K ^{[1
]}

Kawasaki, S ^{[1
]}

Nakashima, H ^{[1
]}

机构：

[1] Kyushu Univ, Appl Mech Res Inst, Adv Fus Res Ctr, Kasuga, Fukuoka 816, Japan

来源：

NUCLEAR FUSION | 2000年 / 40卷 / 3Y期

关键词：

D O I：

10.1088/0029-5515/40/3Y/303

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：

Current profile control experiments were carried out in TRIAM-1M by the combination of two lower hybrid waves (LHWs) at 8.2 and 2.45 GHz with different spectra of parallel refractive index N-parallel to. In the combined lower hybrid current drive (LHCD) discharge, the current drive efficiency was improved by a factor of >1.5 compared with 8.2 GHz LHCD only and 2.45 GHz LHCD only. Measurements of the internal inductance and the radial profile of hard X ray emission indicated that the current profile can be controlled by changing the additional power of the 2.45 GHz LHW to the 8.2 GHz LHCD plasma. The improvement of the current drive efficiency and the modification of the current profile are considered to be attributable to the enhancement of the absorption of lower N-parallel to waves by higher N-parallel to waves in the two kinds of LHWs. Moreover, the controlled current profile can be successfully sustained for about two orders of magnitude longer than the current diffusion time.

引用

页码：453 / 459

页数：7

共 10 条

[1] On the motion of cosmic rays in interstellar space [J].

Alfven, H .

PHYSICAL REVIEW, 1939, 55 (05) :0425-0429

[2] Profile control experiments in JET using off-axis lower hybrid current drive [J].

Ekedahl, A ;

Baranov, YF ;

Dobbing, JA ;

Fischer, B ;

Gormezano, C ;

Jones, TTC ;

Lennholm, M ;

Parail, VV ;

Rimini, FG ;

Romero, JA ;

Schild, P ;

Sips, ACC ;

Soldner, FX ;

Tubbing, BJD .

NUCLEAR FUSION, 1998, 38 (09) :1397-1407

[3] High performance reversed shear plasmas with a large radius transport barrier in JT-60U [J].

Fujita, T ;

Hatae, T ;

Oikawa, T ;

Takeji, S ;

Shirai, H ;

Koide, Y ;

Ishida, S ;

Ide, S ;

Ishii, Y ;

Ozeki, T ;

Higashijima, S ;

Yoshino, R ;

Kamada, Y ;

Neyatani, Y .

NUCLEAR FUSION, 1998, 38 (02) :207-221

[4]

Ikeda Y., 1995, Plasma Physics and Controlled Nuclear Fusion Research 1994. Proceedings of the Fifteenth International Conference on Plasma Physics and Controlled Nuclear Fusion Research, P415

[5] Recent progress on high performance steady state plasmas in the superconducting tokamak TRIAM-1M [J].

Itoh, S ;

Sato, KN ;

Nakamura, K ;

Zushi, H ;

Sakamoto, M ;

Hanada, K ;

Jotaki, E ;

Makino, K ;

Kawasaki, S ;

Nakashima, H ;

Yoshida, N .

NUCLEAR FUSION, 1999, 39 (9Y) :1257-1270

[6]

ITOH S, 1997, FUSION ENERGY 1996, V3, P351

[7]

LUCKHARDT SC, 1989, PHYS REV LETT, V30, P1508

[8] PROFILE CONTROL WITH LOWER-HYBRID WAVES ON ASDEX [J].

SOLDNER, FX ;

LEUTERER, F ;

BARTIROMO, R ;

BERNABEI, S ;

BUCHSE, R ;

GEHRE, O ;

HARVEY, RW ;

KORNHERR, M ;

MCCORMICK, K ;

MURMANN, HD ;

PEREVERZEV, GV .

NUCLEAR FUSION, 1994, 34 (07) :985-1016

[9] Feedback control of the current profile on Tore Supra [J].

Wijnands, T ;

VanHoutte, D ;

Martin, G ;

Litaudon, X ;

Froissard, P .

NUCLEAR FUSION, 1997, 37 (06) :777-791

[10]

YANAGAJO T, 1997, 1996 INT C PLASM PHY, V1, P1022

← 1 →