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＜journal article＞
First Ohmic Discharge Assisted with RF Power in QUEST Spherical Tokamak

Creator
Creator Name
MITARAI Osamu
ミタライ, オサム
Affiliation
Affiliation Name
Liberal Arts Education Center, Kumamoto Campus, Tokai University, 9-1-1 Toroku, Kumamoto 862-8652, Japan
Creator Name
NAKAMURA Kazuo
ナカムラ, カズオ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
TASHIMA Saya
タシマ, サヤ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
HASEGAWA Makoto
ハセガワ, マコト
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
IDEI Hiroshi
イデイ, ヒロシ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
SAKAMOTO Mizuki
サカモト, ミズキ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
HANADA Kazuaki
ハナダ, カズアキ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
ZUSHI Hideki
ズシ, ヒデキ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
SATO Kohnosuke
サトウ, コウノスケ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
ISHIGURO Masaki
イシグロ, マサキ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
LIU Hai Qing
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
HIGASHIZONO Yuta
ヒガシゾノ, ユウタ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
HIGASHIJIMA Aki
ヒガシジマ, アキ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
NAKASHIMA Hisatoshi
ナカシマ, ヒサトシ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
KAWASAKI Shoji
カワサキ, ショウジ
Affiliation
Affiliation Name
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
Creator Name
TAKASE Yuichi
タカセ, ユウイチ
Affiliation
Affiliation Name
Graduate School of Frontier Sciences and Graduate School of Science, University of Tokyo, Kashiwa 277-85611, Japan
Creator Name
MAEKAWA Takashi
マエカワ, タカシ
Affiliation
Affiliation Name
Graduate School of Energy Science, Kyoto University, Kyoto 606-8502, Japan
Creator Name
NISHINO Nobuhiro
ニシノ, ノブヒロ
Affiliation
Affiliation Name
Department of Engineering, Hiroshima Univeristy, Higashi-Hiroshima 739-8527, Japan
Language
English
Publisher
社団法人 プラズマ・核融合学会
The Japan Society of Plasma Science and Nuclear Fusion Research
Date
2011
Source Title
Plasma and Fusion Research
Plasma and Fusion Research
Vol
6
First Page
1402003
Last Page
1402003
Publication Type
Version of Record
Access Rights
open access
Rights
(C) 2011 The Japan Society of Plasma Science and Nuclear Fusion Research
Abstract Ohmic plasma currents of up to 17 kA with a discharge duration of 0.32 s have been obtained in the Kyushu University Experiment with Steady-State Spherical Tokamak (QUEST) with the help of electron cy...clotron wave (ECW) and cancellation coils (CCs). The CCs, originally installed to create a field null in the plasma breakdown phase, are essential for producing plasma current in QUEST. Although the ohmic coil current is initially biased and then reduced completely to zero to induce the plasma current in 15-20 ms, we demonstrate that the flat top of the plasma current exceeding 20 ms is maintained by the vertical field after the ohmic current is switched off. This type of operation is quite favorable for extending pulsed operation to the steady state by electron Bernstein wave current drive (EBCD).
Ohmic plasma currents of up to 17 kA with a discharge duration of 0.32 s have been obtained in the Kyushu University Experiment with Steady-State Spherical Tokamak (QUEST) with the help of electron cyclotron wave (ECW) and cancellation coils (CCs). The CCs, originally installed to create a field null in the plasma breakdown phase, are essential for producing plasma current in QUEST. Although the ohmic coil current is initially biased and then reduced completely to zero to induce the plasma current in 15-20 ms, we demonstrate that the flat top of the plasma current exceeding 20 ms is maintained by the vertical field after the ohmic current is switched off. This type of operation is quite favorable for extending pulsed operation to the steady state by electron Bernstein wave current drive (EBCD).show more

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pdf 2011-QUEST-OH pdf 3.20 MB 329  

Details

Record ID
1316655
Peer-Reviewed
Refereed
Subject Terms
spherical_tokamak
spherical_tokamak
current_start-up
current_start-up
ohmic_clamp
ohmic_clamp
cancellation_coil
cancellation_coil
ECW
ECW
vertical_field
vertical_field
ISSN
1880-6821
Created Date 2013.12.09
Modified Date 2023.07.28

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