低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
テーマ解説
S-イノベにおける高温超伝導加速器マグネット技術研究開発の概要
―ビームライン試験・繰り返し励磁試験を中心とした成果と将来展望―
雨宮 尚之曽我部 友輔高山 茂貴小柳 圭石井 祐介来栖 努荻津 透岩田 佳之野田 耕司吉本 政弘
著者情報
ジャーナル フリー

2020 年 55 巻 2 号 p. 89-97

詳細
抄録

A cryocooler-cooled magnet consisting of RE-123 coils and an iron return yoke in its cryostat was tested on the beam line of the Heavy Ion Medial Accelerator in Chiba (HIMAC). The magnet has a room temperature beam duct, at which a magnetic field of 2.4 T is generated, whereas the maximum magnetic field to which coated conductors are exposed is approximately 4 T. On the beam line of the HIMAC, at first, beam guiding using the magnet was demonstrated, and then a carbon-ion beam was injected intentionally into the RE-123 coils of the magnet to simulate the incident of uncontrolled beam injection into accelerator magnets. Repeated excitation experiments of the magnet were conducted in order to study its tolerance against AC loss and stability, as well as the reproducibility of the magnetic field generated. The magnet was excited repeatedly with a saw-tooth waveform to examine the tolerance against AC loss. Next, we examined the influence of shielding current on the field stability and reproducibility at the steps during ramping down, where the current was held constant. Prior to such series of tests using the magnet, the feasibility of quench detection using voltage taps and protection using a dump resistor were studied through quench experiments using short pieces of RE-123 coated conductors. Indeed, such quench detection and quench protection schemes were implemented for the test magnet.

著者関連情報
© 2020 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
前の記事 次の記事
feedback
Top