Numerical evaluation of transient thermal stability of no-insulation REBCO pancake coils with a noncontact area between turns

Mayu Kitamura, Kyoka Tsuyoshi, Ui Nemoto, Atsushi Ishiyama, So Noguchi

研究成果: Article査読

抄録

We have been developing a no-insulation (NI) REBCO coil for applications in medical cyclotrons for cancer therapy and high-magnetic-field whole-body MRIs. NI-REBCO pancake coil is expected to realize both high current density and thermal stability, which are essentially trade-off relationships. Because electrical insulation is absent in an NI coil, the operating cur-rent can bypass toward adjacent turns to avoid the defect area when a local defect occurs. Using this feature, we investigated the possibility of continuous operation even if there is a local defect in a part of the coil windings. However, the contact condi-tion between turns in actual coil windings is not uniform, and there is a possibility of an area that is not completely in contact. Moreover, when winding noncircular coils, e.g., coils for an ac-celerator, the noncontact area between turns can be large since the straight area is not tensioned. In such a case, even if a local defect occurs, it cannot bypass toward adjacent turns, compro-mising thermal stability. In this study, we examined the ther-mal stability of NI-REBCO pancake coils when a local defect occurred using the length, number, and location of noncontact areas between turns as parameters. We also examined the pos-sibility of continuous operation and discovered conditions that allow for continuous operation.

本文言語English
ページ(範囲)1
ページ数1
ジャーナルIEEE Transactions on Applied Superconductivity
DOI
出版ステータスAccepted/In press - 2022

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

フィンガープリント

「Numerical evaluation of transient thermal stability of no-insulation REBCO pancake coils with a noncontact area between turns」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル