Compact antenna for two-dimensional beam scan in the JT-60U electron cyclotron heating/current drive system

被引：6

作者：

Moriyama, S ^{[1
]}

Kajiwara, K ^{[1
]}

Takahashi, K ^{[1
]}

Kasugai, A ^{[1
]}

Seki, M ^{[1
]}

Ikeda, Y ^{[1
]}

Fujii, T ^{[1
]}

机构：

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

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2005年 / 76卷 / 11期

关键词：

D O I：

10.1063/1.2130967

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A compact antenna system was designed and fabricated to enable millimeter-wave beam scanning in the toroidal and poloidal directions of the JT-60U tokamak for electron cyclotron heating (ECH) and electron cyclotron current drive (ECCD) experiments. The antenna consists of a fast movable flat mirror mounted on the tokamak vacuum vessel and a rotary focusing mirror attached at the end of the waveguide that is supported from outside the vacuum vessel. This separate support concept enables a compact structure inside a shallow port (0.68x0.54x0.2 m) that is shared with a subport for an independent diagnostic system. During a plasma shot, the flat mirror is driven by a servomotor with a 3-m-long drive shaft to reduce the influence of the high magnetic field on the motor. The focusing mirror is rotated by a simple mechanism utilizing a push rod and an air cylinder. The antenna has been operated reliably for 3 years after a small improvement to the rotary drive mechanism. It has made significant contributions to ECH and ECCD experiments, especially the current profile control in JT-60U. (c) 2005 American Institute of Physics.

引用

页码：1 / 6

页数：6

共 16 条

[1]

ERCKMANN V, 1994, PLASMA PHYS CONTROL, V36, P1868

[2] Overview of JT-60U results leading to high integrated performance in reactor-relevant regimes [J].

Fujita, T ;

Akasaka, H ;

Akino, N ;

Anno, K ;

Arai, M ;

Arai, T ;

Asakura, N ;

Ashikawa, N ;

Azumi, M ;

Bak, PE ;

Bakhtiari, M ;

Bruskin, LG ;

Chankin, A ;

Cheng, CZ ;

Chiba, S ;

Ebisawa, N ;

Fujii, T ;

Fujita, T ;

Fukuda, T ;

Funaba, H ;

Funahashi, A ;

Furukawa, H ;

Furukawa, M ;

Gao, X ;

Gorelenkov, NN ;

Gotoh, Y ;

Grisham, L ;

Haga, S ;

Hamamatsu, K ;

Hamano, T ;

Hatae, T ;

Hatayama, A ;

Hayashi, N ;

Hayashi, T ;

Higashijima, S ;

Hikida, N ;

Hill, KW ;

Hiranai, S ;

Hiratsuka, H ;

Hirohata, Y ;

Hobirk, J ;

Honda, A ;

Honda, M ;

Hoshi, Y ;

Hosogane, N ;

Hosoyama, H ;

Ichige, H ;

Ide, S ;

Idomura, Y ;

Igarashi, K .

NUCLEAR FUSION, 2003, 43 (12) :1527-1539

[3] The 110-GHz electron cyclotron range of frequency system on JT-60U: Design and operation [J].

Ikeda, Y ;

Kasugai, A ;

Moriyama, S ;

Kajiwara, K ;

Seki, M ;

Tsuneoka, M ;

Takahashi, K ;

Anno, K ;

Hamamatsu, K ;

Hiranai, S ;

Ikeda, Y ;

Imai, T ;

Sakamoto, K ;

Shimono, M ;

Shinozaki, S ;

Terakado, M ;

Yamamoto, T ;

Yokokura, K ;

Fujii, T .

FUSION SCIENCE AND TECHNOLOGY, 2002, 42 (2-3) :435-451

[4] Complete stabilization of a tearing mode in steady state high-βp H-mode discharges by the first harmonic electron cyclotron heating/current drive on JT-60U [J].

Isayama, A ;

Kamada, Y ;

Ide, S ;

Hamamatsu, K ;

Oikawa, T ;

Suzuki, T ;

Neyatani, Y ;

Ozeki, T ;

Ikeda, Y ;

Kajiwara, K .

PLASMA PHYSICS AND CONTROLLED FUSION, 2000, 42 (12) :L37-L45

[5] Measurement of magnetic island width in long-pulse, high-βN discharges in JT-60U [J].

Isayama, A ;

Kamada, Y ;

Ozeki, T ;

Isei, N .

PLASMA PHYSICS AND CONTROLLED FUSION, 1999, 41 (01) :35-43

[6] High-beta steady-state research and future directions on the Japan Atomic Energy Research Institute Tokamak-60 Upgrade and the Japan Atomic Energy Research Institute Fusion Torus-2 Modified [J].

Ishida, S .

PHYSICS OF PLASMAS, 2004, 11 (05) :2532-2542

[7]

Jacquinot J, 1999, NUCL FUSION, V39, P2495, DOI 10.1088/0029-5515/39/12/306

[8]

Kajiwara K, 2003, AIP CONF PROC, V694, P325, DOI 10.1063/1.1638051

[9] Design status of EC system in ITER - design of reliable RF beam launching system [J].

Kobayashi, N ;

Bosia, G ;

Petzold, B .

FUSION ENGINEERING AND DESIGN, 2001, 53 (1-4) :475-484

[10]

LEUTERER F, 2003, P IAEA TM ECRH PHYS

← 1 2 →