Investigation of Elimination Techniques for Screening-Current-Induced Magnetization in High Temperature Superconducting Tapes Utilizing Abnormal Transverse-Field Effect

• Project/Area Number: 24360110
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kyushu University
• Principal Investigator: KAJIKAWA Kazuhiro 九州大学, 超伝導システム科学研究センター, 准教授 (10294894)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000); Fiscal Year 2014: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2013: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000); Fiscal Year 2012: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
• Keywords: 高温超伝導体 / テープ線材 / 遮蔽電流 / 磁化 / 異常横磁界効果

Outline of Final Research Achievements

It was experimentally verified that the in-plane screening currents induced in the tapes constituting layer-wound and pancake coils with high temperature superconducting (HTS) tapes can be removed by applying small AC magnetic fields using additional degaussing coils on the basis of the abnormal transverse-field effect. It was also confirmed that the screening currents induced in the HTS tape windings for full-scale NMR insert coils can be reduced for the application of small external AC fields.

Research Products

• [Journal Article] Designs and tests of shaking coils to reduce screening currents induced in HTS insert coils for NMR magnet (2015)
  • Author(s): K.Kajikawa, G.V.Gettliffe, Y.Chu, D.Miyagi, T.P.Lecrevisse, S.Hahn, J.Bascunan and Y.Iwasa
  • Journal Title: IEEE Trans. Appl. Supercond. Volume: 25 Issue: 3 Pages: 4300305-4300305
  • DOI: 10.1109/tasc.2014.2363495
  • NAID: 40020460709
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A high-resolution 1.3-GHz/54-mm LTS/HTS NMR magnet (2015)
  • Author(s): Y.Iwasa, J.Bascunan, S.Hahn, J.Voccio, Y.Kim, T.Lecrevisse, J.Song and K.Kajikawa
  • Journal Title: IEEE Trans. Appl. Supercond. Volume: 25 Issue: 3 Pages: 4301205-4301205
  • DOI: 10.1109/tasc.2014.2363496
  • Peer Reviewed
• [Journal Article] Feasibility study for elimination of the screening current-induced fields in HTS coil (2015)
  • Author(s): K.L.Kim, S.Hahn, Y.H.Choi, Y.G.Kim, D.H.Kang, K.Kajikawa and H.G.Lee
  • Journal Title: J. Supercond. Nov. Magn. Volume: 28 Issue: 1 Pages: 83-88
  • DOI: 10.1007/s10948-014-2790-y
  • Peer Reviewed
• [Journal Article] NMRマグネット用HTSインサートコイルに誘起された遮蔽電流を低減するShakingコイルの設計・試験 (2015)
  • Author(s): 柁川一弘，G.Gettliffe，Y.Chu，宮城大輔，T.Lecrevisse，S.Hahn，J.Bascunan，岩佐幸和
  • Journal Title: 超伝導システム科学研究センター報告 Volume: 12 Pages: 11-24
  • NAID: 40020460709
  • Acknowledgement Compliant
• [Journal Article] Reduction of Magnetization in Windings Composed of HTS Tapes (2012)
  • Author(s): K. Kajikawa and K. Funaki
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: Vol.22 Issue: 3 Pages: 4400404-4400404
  • DOI: 10.1109/tasc.2011.2181138
  • NAID: 40019311038
  • Peer Reviewed
• [Presentation] NMR用HTSコイルに誘起された遮蔽電流を抑制するHTS補償コイルの製作・試験 (2014)
  • Author(s): 柁川一弘，G.Gettliffe，Y.Chu，宮城大輔，T.Lecrevisse，S.Hahn，J.Bascunan，岩佐幸和
  • Organizer: 第90回2014年度秋季低温工学・超電導学会
  • Place of Presentation: コラッセふくしま（福島市）
  • Year and Date: 2014-11-06
• [Presentation] Experimental Study on the Elimination of Screening Current Induced Fields in No-Insulation HTS Coils (2014)
  • Author(s): K.Kim, S.Hahn, K.Kajikawa, D.G.Yang and H.Lee
  • Organizer: 2014 Applied Superconductivity Conference
  • Place of Presentation: Charlotte Convention Center (Charlotte, North Carolina, USA)
  • Year and Date: 2014-08-12
• [Presentation] NMR用HTSインサートにおける遮蔽電流を抑制する補償コイルの設計 (2014)
  • Author(s): 柁川一弘，S.Hahn，岩佐幸和
  • Organizer: 第89回2014年度春季低温工学・超電導学会
  • Place of Presentation: タワーホール船堀（東京都江戸川区）
  • Year and Date: 2014-05-26
• [Presentation] Reduction of Magnetization due to Shielding Current Induced in HTS Tapes for MRI/NMR Application
  • Author(s): K.Kajikawa
  • Organizer: Francis Bitter Magnet Laboratory, MIT
  • Place of Presentation: Cambridge, MA, USA
• [Presentation] Designs and Tests of Compensation Coils to Reduce Screening Currents Induced in HTS Insert Coil for NMR Magnet
  • Author(s): K.Kajikawa, S.Hahn, J.Bascunan and Y.Iwasa
  • Organizer: 2014 Applied Superconductivity Conference
  • Place of Presentation: Charlotte, NC, USA
• [Remarks]
  • URL: http://www.sc.kyusyu-u.ac.jp/~kajikawa/