Maximum likelihood estimation of all strand positions in Cable-in-Conduit superconductor considering compressed deformation

2013 Fiscal Year Final Research Report

• Project/Area Number: 23360118
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Hachinohe Institute of Technology (2012-2013); Tohoku University (2011)
• Principal Investigator: HAMAJIMA TAKATARO 八戸工業大学, 工学(系)研究科(研究院), 教授 (00314815)
• Co-Investigator(Kenkyū-buntansha): TSUDA Makoto 東北大学, 大学院・工学研究科, 教授 (10267411) ; MIYAGI Daisuke 東北大学, 大学院・工学研究科, 准教授 (10346413)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 電気エネルギー工学 / 超伝導機器

Research Abstract

Large scale superconducting coil made of cable-in-conduit conductor causes deterioration on superconductivity characteristics when it is operated under high magnetic field. This stems from that each strand deviates from the expected original position and irregularly links with external magnetic field. In order to investigate the cause, three dimensional all strand locations in the conductor are analyzed by both equal area method and minimization method of mechanical strain energies of all strands with consideration of conductor parameters such as void fraction and twist pitches and compressed deformation, and then are compared with measured ones. Since the results show many analyzed statistical quantities are in good agreement with measured ones, this analysis makes clear the cause of deterioration.

Research Products

• [Journal Article] Study on Resistance Distribution between Superconducting Strand and a Copper Sleeve in a CICC Joint Considering Three-Dimensional Strand Path (2014)
  • Author(s): T. Morimura, D. Miyagi, M. Tsuda, T. Hamajima, T. Yagai, N. Koizumi, Y. Nunoya, K. Takahata, T. Obana
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: Vol.24(to be published) Pages: 4801404-1-4
  • Peer Reviewed
• [Journal Article] Analysis of Contact Lengths of Strands with Cu Sleeves in CICC Joints (2012)
  • Author(s): Shinobu NAKAZAWA, Daichi ARAI, Toshiya MORIMURA, Daisuke MIYAGI, Makoto TSUDA, Takataro HAMAJIMA
  • Journal Title: Plasma and Fusion Research Volume: Vol.7 Pages: 2403143-1-4
  • DOI: 10.1585/pfr.7.2403143S
  • Peer Reviewed
• [Journal Article] Ic analysis of Nb3Sn Strand Cable-in-Conduit Conductor under the Electromagnetic Force by the structural Mechanics (2012)
  • Author(s): Tsuyoshi Yagai, Takataro Hamajima
  • Journal Title: Plasam and Fusion Research Volume: Vol.7 Pages: 2405026-1-4
  • DOI: 10.1585/pfr.7.2405026
  • Peer Reviewed
• [Journal Article] Optimal Pitch Analysis Governing Contact Strand Number and Lengths With Cu Sleeves at CIC Joints (2012)
  • Author(s): S. Nakazawa, S. Teshima, D. Arai, D. Miyagi, M. Tsuda, T. Hamajima, T. Yagai, Y. Nunoya, N. Koizumi, K. Takahata, and T. Obana
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: Vol.22 Pages: 4802004-1-4
  • DOI: 10.1109/TASC.2011.2177616
  • Peer Reviewed
• [Journal Article] Analysis of 3-D Locations of All Strands in CIC Conductor (2012)
  • Author(s): D. Miyagi, S. Teshima, S. Nakazawa, D. Arai, M. Tsuda, T. Hamajima, T. Yagai, N. Koizumi, Y. Nunoya, K. Takahata, and T. Obana
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: Vol.22 Pages: 4802104-1-4
  • Peer Reviewed
• [Journal Article] Analysis of strand positions in CIC conductor (2011)
  • Author(s): Teshima, S. Nakazawa, M. Tsuda, T. Hamajima, T. Yagai, Y. Nunoya, K. Okuno, K. Takahata
  • Journal Title: Physica C Volume: Vol.471 Pages: 1550-1553
  • DOI: 10.1016/j.physc.2011.05.236
  • Peer Reviewed
• [Journal Article] ケーブル・イン・コンジット導体ジョイントにおける超電導素線と銅スリーブ間の接触素線数と接触長分布に関する解析 (2011)
  • Author(s): 中澤忍, 手島翔太郎, 荒井大地, 宮城大輔, 津田理, 濱島高太郎, 谷貝剛, 布谷嘉彦, 小泉徳潔, 高畑一也, 尾花哲浩
  • Journal Title: 低温工学 Volume: Vol.46 Pages: 474-480
  • DOI: 10.2221/jcsj.46.474
  • Peer Reviewed
• [Presentation] CIC 導体の撚りピッチがジョイント部の超電導素線-銅スリーブ間接触状況に及ぼす影響 (2013)
  • Author(s): 森村俊也, 渡部一晃, 宮城大輔, 津田理, 濱島高太郎, 谷貝剛, 高畑一也, 尾花哲浩
  • Organizer: 平成25年度電気関係学会東北支部連合大会,2G11
  • Place of Presentation: 会津大学(福島)
  • Year and Date: 2013-08-23
• [Presentation] Study on Resistance Distribution between Superconducting Strand and a Copper Sleeve in a CICC Joint Considering Three-Dimensional Strand Path (2013)
  • Author(s): T. Morimura, D. Miyagi, M. Tsuda, T. Hamajima, T. Yagai, N. Koizumi, Y. Nunoya, K. Takahata, T. Obana
  • Organizer: 23th International Conference on Magnet Technology, 2PoAA-06
  • Place of Presentation: Boston America
  • Year and Date: 2013-07-16
• [Presentation] CIC 導体ジョイント部における超電導素線-銅スリーブ間の抵抗分布解析 (2013)
  • Author(s): 森村俊也, 宮城大輔, 津田理, 濱島高太郎,谷貝剛, 高畑一也, 尾花哲浩
  • Organizer: 第87回2013年度春季低温工学・超電導学会講演概要集, 1C-p06, p39
  • Place of Presentation: タワーホール船堀
  • Year and Date: 2013-05-13
• [Presentation] CIC 導体内の素線軌跡を考慮したラップジョイント部における接触抵抗分布解析 (2013)
  • Author(s): 森村俊也, 荒井大地, 宮城大輔, 津田理, 濱島高太郎, 谷貝剛, 小泉徳潔, 布谷嘉彦,高畑一也, 尾花哲浩
  • Organizer: 電気学会超電導応用電力機器研究会, ASC-13-018
  • Place of Presentation: 産業技術総合研究所 つくば共用講堂
  • Year and Date: 2013-01-16
• [Presentation] ケーブル製造工程と弾性エネルギーを考慮したCIC 導体内の三次元素線軌跡の推定 (2012)
  • Author(s): 森村俊也, 中澤忍, 荒井大地, 宮城大輔, 津田理, 濱島高太郎, 谷貝剛, 小泉徳潔, 布屋嘉彦, 高畑一也, 尾花哲浩
  • Organizer: 電気学会超電導応用電力機器研究会
  • Place of Presentation: 四日市じばさん三重
  • Year and Date: 2012-06-21
• [Presentation] Study on optimization of contact conditions between CIC conductors at joint region (2012)
  • Author(s): D. Arai, S. Nakazawa, T. Morimura, D. Miyagi, M. Tsuda, T. Hamajima, T. Yagai, Y. Nunoya, N. Koizumi, K. Takahata, T. Obana
  • Organizer: ICEC 24 - ICMC2012
  • Place of Presentation: Fukuoka, Japan
  • Year and Date: 2012-05-15
• [Presentation] Analysis of Contact Lengths of Strands with Cu Sleeves in CICC Joints (2011)
  • Author(s): Shinobu NAKAZAWA, Daichi ARAI, Toshiya MORIMURA, Daisuke MIYAGI, Makoto TSUDA, Takataro HAMAJIMA, Tsuyoshi YAGAI, Yoshihiko NUNOYA, Norikiyo KOIZUMI, Kazuya TAKAHATA and Tetsuhiro OBANA
  • Organizer: 21st International Toki Conference
  • Place of Presentation: Ceratopia Toki Gifu, Japan
  • Year and Date: 2011-11-28
• [Presentation] CIC 導体素線のケーブル表面に現れる分布特性について (2011)
  • Author(s): 森村俊也, 中澤忍, 荒井大地, 宮城大輔, 津田理, 濱島高太郎, 谷貝剛, 布谷嘉彦, 小泉徳潔, 高畑一也, 尾花哲浩
  • Organizer: 第85回2011年度秋季低温工学・超電導学会講演概要集
  • Place of Presentation: 金沢歌劇座
  • Year and Date: 2011-11-09
• [Presentation] Optimal Pitch Analysis Governing Contact Strand Number and Lengths With Cu Sleeves at CIC Joints (2011)
  • Author(s): S. Nakazawa, S. Teshima, D. Arai, D. Miyagi, M. Tsuda, T. Hamajima, T. Yagai, Y. Nunoya, N. Koizumi, K. Takahata, and T. Obana
  • Organizer: The 22th International conference on Magnet Technology
  • Place of Presentation: Marseille, France
  • Year and Date: 2011-09-12