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Titolo:
Electron cyclotron heating scenario and experimental results in LHD
Autore:
Idei, H; Kubo, S; Shimozuma, T; Sato, M; Ohkubo, K; Yoshimura, Y; Takita, Y; Kobayashi, S; Ito, S; Mizuno, Y; Tsumori, K; Ikeda, K; Notake, T; Watari, T; Kaneko, O; Komori, A; Yamada, H; de Vries, PC; Goto, M; Ida, K; Inagaki, S; Kado, S; Kawahata, K; Kobuchi, T; Minami, T; Miyazawa, J; Morisaki, T; Morita, S; Murakami, S; Muto, S; Nagayama, Y; Nakanishi, H; Narihara, K; Peterson, BJ; Sakakibara, S; Sasao, H; Sato, K; Tanaka, K; Takeiri, Y; Watanabe, KY; Yamada, I; Motojima, O; Fujiwara, M;
Indirizzi:
Natl Inst Fus Sci, Toki, Gifu 5095292, Japan Natl Inst Fus Sci Toki Gifu Japan 5095292 Sci, Toki, Gifu 5095292, Japan Nagoya Univ, Fac Engn, Nagoya, Aichi 4648603, Japan Nagoya Univ Nagoya Aichi Japan 4648603 Engn, Nagoya, Aichi 4648603, Japan Grad Univ Adv Studies, Dept Fus Study, Toki 5095292, Japan Grad Univ Adv Studies Toki Japan 5095292 Fus Study, Toki 5095292, Japan
Titolo Testata:
FUSION ENGINEERING AND DESIGN
, volume: 53, anno: 2001,
pagine: 329 - 336
SICI:
0920-3796(200101)53:<329:ECHSAE>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-FIELD; PLASMA;
Keywords:
electron cyclotron heating; wave propagation; large helical device;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Idei, H Natl Inst Fus Sci, 322-6 Oroshi Cho, Toki, Gifu 5095292, Japan Natl Inst Fus Sci 322-6 Oroshi Cho Toki Gifu Japan 5095292 , Japan
Citazione:
H. Idei et al., "Electron cyclotron heating scenario and experimental results in LHD", FUSION ENG, 53, 2001, pp. 329-336

Abstract

A large helical device (LHD) experiment began at the end of March 1998. Fundamental and second harmonic electron cyclotron heating (ECH) are used as a plasma production and heating method with six gyrotrons whose frequenciesare 82.6/84 and 168 GHz, respectively. Up to 0.9 MW power has been injected in LHD with long distance corrugated waveguide transmission systems. The maximum pulse width is achieved to 3.0 s/240 kW for the LHD experiments. Six antenna systems have been prepared at the horizontally and vertically elongated poloidal sections. The maximum stored energy using all six gyrotronsis 70 kJ at the averaged density of (n) over bar (e) = 4 x 10(18) m(-3). The maximum central electron temperature T-e0 = 3.5 keV is achieved at (n) over bar (e) = 3 x 10(18) m(-3). The magnetic field structure in heliotron type devices like LHD, notably near the coil, is complicated. For this oblique injection, a wave is launched from the antenna, and then crosses the plasma in the complex field structure near the coil. The polarization ellipse of the wave is changed along the ray-path. The wave propagation in heliotron type devices has been analyzed in an ideal case that the magnetic field component along the propagation direction can be neglected. Even for perpendicular injection with our antenna systems, the field component along the propagation direction is not so small. Another treatment of the wave-propagation is introduced. Some calculations for the heating scenario with this treatment are shown. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 02/04/20 alle ore 09:17:48