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Progress on performance tests of ITER gyrotrons and design of dual-frequency gyrotrons for ITER staged operation plan

Ryosuke Ikeda, Ken Kajiwara, Taku Nakai, Takeru Ohgo, Satoru Yajima, Takahiro Shinya, Takayuki Kobayashi, Koji Takahashi, Shinichi Moriyama, Taku Eguchi2021年被引用 11Nuclear FusionIF 3出版社

This paper presents the progress of performance tests of ITER gyrotrons developed at QST and the design of dual-frequency (170 GHz and 104 GHz) gyrotrons to enhance various operation scenarios in ITER, such as characteristics studies of H-mode/ELM at low magnetic fields. The major achievements in developing the ITER gyrotrons are as follows: (i) manufacturing of eight ITER gyrotrons and their auxiliary components has been completed. Performance tests at QST have been progressing and four of the eight gyrotrons achieved the required test criteria—1 MW/300 s/50%, 5 kHz modulation with ⩾0.8 MW. Excitation of LP01 mode having a purity of ⩾95% was also successfully demonstrated using a 50 mm-diameter waveguide transmission line, satisfying the specification. (ii) The design of dual-frequency gyrotrons capable of 1 MW continuous-wave operation, was successfully completed.

日本語訳

本論文は、QSTで開発されたITER用ジャイロトロンの性能試験の進捗と、低磁場におけるHモード/ELMの特性研究など、ITERにおける様々な運転シナリオを強化するための二周波数(170 GHzおよび104 GHz)ジャイロトロンの設計について述べる。ITER用ジャイロトロンの開発における主な成果は以下の通りである:(i) 8基のITER用ジャイロトロンとその補助コンポーネントの製造が完了した。QSTでの性能試験は進行中であり、8基のうち4基が要求試験基準—1 MW/300秒/50%、⩾0.8 MWでの5 kHz変調—を達成した。⩾95%の純度を有するLP01モードの励起も、50 mm径の導波管伝送線路を用いて実証に成功し、仕様を満たした。(ii) 1 MW連続波動作が可能な二周波数ジャイロトロンの設計が首尾よく完了した。

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