単一モード制御電源システムによる低アスペクト比RFPのRWM安定化とプラズマ性能改善

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2022/02/01

タイトル(英語): Stabilization of Resistive Wall Mode and Improved Plasma Performance in a Low-aspect-ratio Reversed Field Pinch by a Single Mode Control Power Supply System

著者名: 長野　友幸（京都工芸繊維大学 大学院 電子システム工学専攻），三瓶　明希夫（京都工芸繊維大学 大学院 電子システム工学専攻），政宗　貞男（中部大学 工学部）

著者名(英語): Tomoyuki Nagano (Kyoto Institute of Technology), Akio Sanpei (Kyoto Institute of Technology), Sadao Masamune (Chubu University)

キーワード: 抵抗性壁モード，RFP，非共鳴モード，RWM制御，低アスペクト比，RELAX　　resistive wall mode，reversed field pinch，non-resonant mode，RWM control，low-aspect-ratio，RELAX

要約(英語): Stabilization of resistive wall modes (RWMs) is one of the important issues in magnetic fusion research. In the reversed field pinch (RFP), the number of unstable RWMs becomes smaller by lowering the aspect ratio (A), the ratio of the minor to major radius of the device. In REversed field pinch of Low-Aspect ratio eXperiment (RELAX), whose aspect ratio is 2, unstable m/n = 1/2 RWM was stabilized by a single mode control power supply system with improvements of discharge performance. In this paper we report new results with modified power supply system in which magnetic boundary condition near the poloidal gaps is controlled. The modified power supply system is designed to stabilize the most unstable m/n = 1/2 mode by use of the saddle coil array covering the whole torus with eight (8) power supplies. The results show that the discharge duration is improved from ～ 3.0 ms to ～ 4.0 ms, limited by the capability of the iron core in RELAX device. Stabilization of the dominant RWM with the resultant improved plasma performance by a single mode control power supply system shows one of the advantages of a low-aspect-ratio RFP concepts.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.142 No.2 （2022）

本誌掲載ページ: 29-36 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/142/2/142_29/_article/-char/ja/