Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Ion cyclotron range of frequency heating experiments on the large helical device and high energy ion behavior
Autore:
Kumazawa, R; Mutoh, T; Seki, T; Watari, T; Saito, K; Torii, Y; Shimpo, F; Nomura, G; Yokota, M; Kato, A; Hartmann, DA; Zhao, Y; Fukuyama, A; Okada, H; Ohkubo, K; Sato, M; Kubo, S; Shimozuma, T; Idei, H; Yoshimura, Y; Notake, T; Takita, Y; Kobayashi, S; Itoh, S; Mizuno, Y; Kaneko, O; Takeiri, Y; Oka, Y; Tsumori, K; Osakabe, M; Ikeda, K; Yamamoto, S; Kawamoto, T; Asano, E; Ohyabu, N; Kawahata, K; Komori, A; Yamada, H; Akaishi, K; Ashikawa, N; Emoto, M; Funaba, H; Goto, M; Ida, K; Inagaki, S; Inoue, N; Isobe, M; Krasilnikov, A; Masuzaki, S; Minami, T; Miyazawa, J; Morisaki, T; Morita, S; Murakami, S; Muto, S; Nakamura, Y; Nagayama, Y; Nakanishi, H; Narihara, K; Narushima, Y; Nishimura, K; Noda, N; Kobuchi, T; Ohdachi, S; Ozaki, T; Peterson, BJ; Sagara, A; Sakakibara, S; Sakamoto, R; Sasao, H; Sasao, M; Sato, K; Shoji, M; Suzuki, H; Tanaka, K; Toi, K; Tokuzawa, T; Yamada, I; Yamaguchi, S; Yokoyama, M; Watanabe, KY; Watanabe, T; Matsuoka, K; Itoh, K; Sudo, S; Yamazaki, K; Hamada, Y; Motojima, O; Fujiwara, M;
Indirizzi:
Natl Inst Fus Sci, Toki 5095292, Japan Natl Inst Fus Sci Toki Japan 5095292 l Inst Fus Sci, Toki 5095292, Japan Nagoya Univ, Fac Engn, Nagoya, Aichi 4648601, Japan Nagoya Univ Nagoya Aichi Japan 4648601 Engn, Nagoya, Aichi 4648601, Japan Max Planck Inst Plasmaphys, D-85748 Garching, Germany Max Planck Inst Plasmaphys Garching Germany D-85748 48 Garching, Germany Acad Sinica, Inst Plasma Phys, Hefei 230031, Peoples R China Acad Sinica Hefei Peoples R China 230031 , Hefei 230031, Peoples R China Kyoto Univ, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501Kyoto Univ, Kyoto 6068501, Japan Kyoto Univ, Uji, Kyoto 6110011, Japan Kyoto Univ Uji Kyoto Japan 6110011Kyoto Univ, Uji, Kyoto 6110011, Japan Grad Univ Adv Studies, Toki 5095292, Japan Grad Univ Adv Studies Toki Japan 5095292 dv Studies, Toki 5095292, Japan Troitsk Inst Innovating & Fus Res, Troitsk, Russia Troitsk Inst Innovating& Fus Res Troitsk Russia s Res, Troitsk, Russia
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 5, volume: 8, anno: 2001,
parte:, 2
pagine: 2139 - 2147
SICI:
1070-664X(200105)8:5<2139:ICROFH>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENGINEERING DESIGN; CONFINEMENT; SYSTEM; LHD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Kumazawa, R Natl Inst Fus Sci, Toki 5095292, Japan Natl Inst Fus Sci Toki Japan 5095292 ci, Toki 5095292, Japan
Citazione:
R. Kumazawa et al., "Ion cyclotron range of frequency heating experiments on the large helical device and high energy ion behavior", PHYS PLASMA, 8(5), 2001, pp. 2139-2147

Abstract

Ion cyclotron range of frequency (ICRF) heating experiments on the Large Helical Device (LHD) [O. Motojima Fus. Eng. Des. 20, 3 (1993)] achieved significant advances during the third experimental campaign carried out in 1999. They showed significant results in two heating modes; these are modes of the ICH-sustained plasma with large plasma stored energy and the neutral beam injection (NBI) plasma under additional heating. A long-pulse operation of more than 1 minute was achieved at a level of 1 MW. The characteristics of the ICRF heated plasma are the same as those of the NBI heated plasma. The energy confinement time is longer than that of International StellaratorScaling 95. Three keys to successful ICRF heating are as follows: (1) an increase in the magnetic field strength, (2) the employment of an inward shift of the magnetic axis, (3) the installation of actively cooled graphite plates along the divertor legs. Highly energetic protons accelerated by the ICRF electric field were experimentally observed in the energy range from 30 to 250 keV and the tail temperature depended on the energy balance between the wave heating and the electron drag. The transfer efficiency from the high energy ions to the bulk plasma was deduced from the increase in the energy confinement time due to the high energy ions in the lower density discharge, which agrees fairly well with the result obtained by the Monte Carlosimulation. The transfer efficiency is expected to be 95% at an electron density of more than n(e)=5.0x10(19) m(-3) even in the high power heating of10 MW. The accumulation of impurities, e.g., FeXVI and OV was not observedin high rf power and long pulse operation. The well-defined divertor intrinsic to LHD is believed to be useful in reducing the impurity influx. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 00:29:19