Initial results of electron cyclotron range of frequency (ECRF) operation and experiments in JT-60U

被引：39

作者：

Ikeda, Y ^{[1
]}

Kasugai, A ^{[1
]}

Takahashi, K ^{[1
]}

Kajiwara, K ^{[1
]}

Isayama, A ^{[1
]}

Ide, S ^{[1
]}

Terakado, M ^{[1
]}

Shinozaki, S ^{[1
]}

Yokokura, K ^{[1
]}

Anno, K ^{[1
]}

Shimono, M ^{[1
]}

Hiranai, S ^{[1
]}

Haga, K ^{[1
]}

Kajiyama, A ^{[1
]}

Ikeda, Y ^{[1
]}

Moriyama, S ^{[1
]}

Tsuneoka, M ^{[1
]}

Sakamoto, K ^{[1
]}

Hamamatsu, K ^{[1
]}

Oikawa, T ^{[1
]}

Kamada, Y ^{[1
]}

Naito, O ^{[1
]}

Seki, M ^{[1
]}

Ushigusa, K ^{[1
]}

Imai, T ^{[1
]}

Yamamoto, T ^{[1
]}

Fujii, T ^{[1
]}

机构：

[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2001年 / 53卷 / 53期

关键词：

D O I：

10.1016/S0920-3796(00)00511-1

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The 110 GHz 1 MW electron cyclotron range of frequency (ECRF) system was designed and constructed on JT-60U to locally heat and control the plasmas. The gyrotron has a diamond window to transmit RF power with Gaussian mode, which is easily transformed to HE,, mode for the transmission line of the corrugated waveguide. The second diamond window is installed at the inlet of the antenna for a vacuum seal between the transmission Line and the JT-60U tokamak. The total length of the transmission line from the gyrotron to the antenna is about 60 m including nine meter bends, The antenna has a focusing mirror and a flat steerable one to focus and to control the RF beam angle mainly in the poloidal direction. In the initial operation, the power of P-EC similar to 0.75 MW for 2 s was successfully injected into plasma when the gyrotron generated the power up to 1 MW. The total transmission efficiency from the gyrotron to the plasma was about 75%. A controllability of local electron heating with the deposition width of = 15 cm was well demonstrated by using the steerable mirror. A large downshift in the deposition position was observed at the high T-e plasma. Strong central electron heating was obtained from 2.2 to 6.6 keV for P-EC similar to 0.75 MW, 0.3 s at the optimized polarization. An effective electron heating was also obtained up to similar to 10 keV during EC injection for similar to 1.6 s in the high beta (p) H-mode plasma produced by NBI. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：351 / 363

页数：13

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