[Table of Contents]

Plasma and Fusion Research

Volume 10, 3402066 (2015)

Regular Articles

Comparison between Non-Inductive Plasma Current Start-Up Using ECRH with and without Fundamental Resonance on QUEST
Hiroki MIURA, Kazuaki HANADA1), Hideki ZUSHI1), Kazuo NAKAMURA1), Akihide FUJISAWA1), Hiroshi IDEI1), Yoshihiko NAGASHIMA1), Makoto HASEGAWA1), Hisatoshi NAKASHIMA1), Shoji KAWASAKI1), Aki HIGASHIJIMA1), Osamu MITARAI2), Atsushi FUKUYAMA3) and Yuichi TAKASE4)
IGSES, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
1)
RIAM, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
2)
Tokai University, 9-1-1 Toroku, Higashi-ku, Kumamoto 862-8652, Japan
3)
RGPPE, Kyoto University, Nisikyo-ku, Kyoto 615-8540, Japan
4)
DCSE, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa 277-8561, Japan
(Received 25 November 2014 / Accepted 21 April 2015 / Published 27 July 2015)

Abstract

Comparison between non-inductive plasma current start-up using electron cyclotron resonance heating (ECRH) with and without fundamental (1st) resonance using 8.2-GHz microwave is experimentally performed on QUEST. Results of soft X-ray measurements in different energy ranges indicate significant difference in the number of current-carrying electrons with and without fundamental resonance. Numerical calculations show effective extendibility of electron energy in ECRH of fundamental resonance.

Keywords

spherical tokamak, plasma current start-up, electron cyclotron resonance heating, current-carrying electron, soft X-ray

DOI: 10.1585/pfr.10.3402066

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This paper may be cited as follows:

Hiroki MIURA, Kazuaki HANADA, Hideki ZUSHI, Kazuo NAKAMURA, Akihide FUJISAWA, Hiroshi IDEI, Yoshihiko NAGASHIMA, Makoto HASEGAWA, Hisatoshi NAKASHIMA, Shoji KAWASAKI, Aki HIGASHIJIMA, Osamu MITARAI, Atsushi FUKUYAMA and Yuichi TAKASE, Plasma Fusion Res. 10, 3402066 (2015).