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Titolo:
Application of millimeter-wave imaging system to LHD
Autore:
Mase, A; Ohashi, M; Yamamoto, A; Negishi, H; Oyama, N; Nagayama, Y; Kawahata, K; Watabe, K; Mizuno, K; Matsuura, H; Uchida, K; Miura, A;
Indirizzi:
Kyushu Univ, Adv Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 , Kasuga, Fukuoka 8168580, Japan Univ Tsukuba, Plasma Res Ctr, Tsukuba, Ibaraki 3058577, Japan Univ Tsukuba Tsukuba Ibaraki Japan 3058577 sukuba, Ibaraki 3058577, Japan Natl Inst Fus Sci, Toki 5095292, Japan Natl Inst Fus Sci Toki Japan 5095292 l Inst Fus Sci, Toki 5095292, Japan Tohoku Univ, Elect Commun Res Inst, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 st, Sendai, Miyagi 9808577, Japan TERATEC Co, R&D Dept 1, Musashino, Tokyo 1800006, Japan TERATEC Co Musashino Tokyo Japan 1800006 Musashino, Tokyo 1800006, Japan
Titolo Testata:
REVIEW OF SCIENTIFIC INSTRUMENTS
fascicolo: 1, volume: 72, anno: 2001,
parte:, 2
pagine: 375 - 378
SICI:
0034-6748(200101)72:1<375:AOMIST>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
3
Recensione:
Indirizzi per estratti:
Indirizzo: Mase, A Kyushu Univ, Adv Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 , Fukuoka 8168580, Japan
Citazione:
A. Mase et al., "Application of millimeter-wave imaging system to LHD", REV SCI INS, 72(1), 2001, pp. 375-378

Abstract

Millimeter-wave imaging systems in the frequency range of 70-140 GHz have been developed for diagnostics of magnetically confined plasmas. The 70 GHzimaging system successfully measures time evolutions of both radial and axial profiles of line density and electron cyclotron emission (ECE) in a tandem mirror. The imaging system is being installed in Large Helical Device (LHD) at the National Institute for Fusion Science. In order to cover the frequency range of the second harmonic ECE on LHD, a new detector using monolithic microwave integrated circuit technology has been designed and fabricated. The detector consists of the integration of a receiving antenna, a down-converting mixer diode, and an intermediate frequency amplifier on a GaAssubstrate chip. The heterodyne response up to 10 GHz was confirmed at 70-140 GHz. The optical system consisting of an ellipsoidal mirror and a flat mirror was designed by using a ray-tracing code and evaluated experimentallyat 140 GHz. (C) 2001 American Institute of Physics.

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Documento generato il 01/10/20 alle ore 14:50:35