• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Dramatic improvement of superconducting accelerating cavity performance by introduction of laminated thin film structure

Research Project

Project/Area Number 26600142
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Quantum beam science
Research InstitutionKyoto University

Principal Investigator

Iwashita Yoshihisa  京都大学, 化学研究所, 准教授 (00144387)

Co-Investigator(Kenkyū-buntansha) 佐伯 学行  大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 准教授 (70282506)
久保 毅幸  大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 助教 (30712666)
Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords超伝導 / 薄膜 / 高周波 / 積層薄膜 / 超伝導加速管 / 超伝導空胴 / 高調波
Outline of Final Research Achievements

The superconducting laminated thin film structure may dramatically improve the performance of superconducting acceleration cavities. In order to study the laminated thin film structure, characteristics of the superconducting thin film structure under cryogenic temperature were investigated. They were evaluated by measuring third harmonic distortions (THD) on induced voltages of an excitation coil of a magnetic field applied to the sample. We have developed the THD measurement system. In the sample of the system with NbN superconducting thin film coated on a high purity bulk niobium plate with a thin SiO2 insulation layer in between, we obtained the world's first measurement result withstanding the magnetic field exceeding the lower critical field of Nb. By this measurement, it becomes possible to formulate guidelines for future thin film fabrication, and it has become possible to accelerate further efforts to improve the performance of the superconducting acceleration cavity.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (25 results)

All 2018 2017 2016 2015

All Journal Article (12 results) (of which Int'l Joint Research: 3 results,  Open Access: 7 results,  Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results) Presentation (13 results) (of which Int'l Joint Research: 10 results,  Invited: 3 results)

  • [Journal Article] R&D OF THIN FILM COATING ON SUPERCONDUCTORS2018

    • Author(s)
      Y. Iwashita, R. Katayama, H. Tongu, H. Hayano, T. Kubo, T. Saeki, M. Hino, H. Oikawa
    • Journal Title

      Proceedings of the 18th International Conference on RF Superconductivity

      Volume: 1 Pages: 877-890

    • DOI

      10.18429/JACoW-SRF2017-THPB058

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Journal Article] Progress on Characterization and Optimization of Multilayers2018

    • Author(s)
      C. Z. Antoine, M. Aburas, H Hayano, S Kato, T Kubo, T Saeki, Y Iwashita
    • Journal Title

      Proceedings of the 18th International Conference on RF Superconductivity

      Volume: 1 Pages: 368-373

    • DOI

      10.18429/JACoW-SRF2017-TUYBA01

    • Related Report
      2017 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] EVALUATION OF SUPERCONDUCTING CHARACTERISTICS ON THE THIN-FILM STRUCTURE BY NbN AND INSULATOR COATINGS ON PURE Nb SUBSTRATE2018

    • Author(s)
      R. Katayama, Y. Iwashita, H. Tongu A. Four, C. Z. Antoine, H. Hayano, T. Kubo, T. Saeki, Hayato Ito, R. Ito, T. Nagata, H. Oikawa
    • Journal Title

      Proceedings of the 9th International Particle Accelerator Conference

      Volume: 1

    • Related Report
      2017 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Measurement of Thin Film Coating on Superconductors2017

    • Author(s)
      Y. Iwashita, Y. Fuwa, H. Tongu, H. Hayano, T. Kubo, T. Saeki, M. Hino, H. Oikawa
    • Journal Title

      Proceedings of the 8th International Particle Accelerator Conference

      Volume: 1 Pages: 1043-1045

    • DOI

      10.18429/JACoW-IPAC2017-MOPVA076

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Journal Article] 三次高調波電圧誘導法による多層膜コーティング超伝導薄膜の評価2017

    • Author(s)
      片山 領,岩下 芳久,頓宮 拓,及川 大基,加藤 茂樹,久保 毅幸,佐伯 学行,早野 仁司,日野 正裕
    • Journal Title

      Proceedings of the 14th Annual Meeting of Particle Accelerator Society of Japan

      Volume: 1 Pages: 27-29

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Journal Article] Multilayer coating for higher accelerating fields in superconducting radio-frequency cavities: a review of theoretical aspects2017

    • Author(s)
      Takayuki Kubo
    • Journal Title

      Superconductor Science and Technology

      Volume: 30 Issue: 2 Pages: 023001-023001

    • DOI

      10.1088/1361-6668/30/2/023001

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] EVALUATION OF SC PROPERTY COATED ON A SURFACE2016

    • Author(s)
      Y. Iwashita, Y. Fuwa, M. Hino, T. Kubo, T. Saeki
    • Journal Title

      Proceedings of the 17th International Conference on RF Superconductivity (SRF2015)

      Volume: - Pages: 723-725

    • Related Report
      2016 Research-status Report
  • [Journal Article] 超伝導薄膜の特性測定2016

    • Author(s)
      岩下 芳久,頓宮 拓,不破 康裕,早野仁司, 佐伯 学行,久保 毅幸
    • Journal Title

      Proceedings of the 13th Annual Meeting of Particle Accelerator Society of Japan

      Volume: - Pages: 851-852

    • Related Report
      2016 Research-status Report
  • [Journal Article] 薄膜超伝導体の高周波臨界磁場評価のためのニオブ製 マッシュルーム型空洞の設計研究2016

    • Author(s)
      及川 大基,東口 武史,岩下 芳久,日野 正裕,久保 毅幸,加藤 茂樹,佐伯 学行,早野 仁司
    • Journal Title

      Proceedings of the 13th Annual Meeting of Particle Accelerator Society of Japan

      Volume: - Pages: 372-376

    • Related Report
      2016 Research-status Report
  • [Journal Article] Construction of Measurement System for Superconducting Characteristics on Thin-film Samples at KEK2016

    • Author(s)
      T. Saeki, H. Hayano, T. Kubo, Y. Iwashita, H. Oikawa
    • Journal Title

      Proceedings of IPAC2016

      Volume: - Pages: 2167-2169

    • DOI

      10.18429/JACoW-IPAC2016-WEPMB021

    • Related Report
      2016 Research-status Report
  • [Journal Article] Dependence of trapped-flux-induced surface resistance of a large-grain Nb SRF cavity on spatial temperature gradient during cool-down through Tc2016

    • Author(s)
      Shichun Huang, Takayuki Kubo, and R. L.Geng
    • Journal Title

      Physical Review Accelerators and Beams

      Volume: 19 Issue: 8 Pages: 082001-082001

    • DOI

      10.1103/physrevaccelbeams.19.082001

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Flux trapping in superconducting accelerating cavities during cooling down with a spatial temperature gradient2016

    • Author(s)
      Takayuki Kubo
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2016 Issue: 5 Pages: 053G01-053G01

    • DOI

      10.1093/ptep/ptw049

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] EVALUATION OF SUPERCONDUCTING CHARACTERISTICS ON THE THIN-FILM STRUCTURE BY NbN AND INSULATOR COATINGS ON PURE Nb SUBSTRATE2018

    • Author(s)
      R. Katayama, Y. Iwashita, H. Tongu A. Four, C. Z. Antoine, H. Hayano, T. Kubo, T. Saeki, Hayato Ito, R. Ito, T. Nagata, H. Oikawa
    • Organizer
      9th International Particle Accelerator Conference(IPAC18)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The next technologies2017

    • Author(s)
      Takayuki Kubo
    • Organizer
      GARD-SRF Roadmap Workshop
    • Place of Presentation
      Fermilab (Illinois.U.S.A.)
    • Year and Date
      2017-02-09
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] R&D OF THIN FILM COATING ON SUPERCONDUCTORS2017

    • Author(s)
      Y. Iwashita, R. Katayama, H. Tongu, H. Hayano, T. Kubo, T. Saeki, M. Hino, H. Oikawa
    • Organizer
      18th International Conference on RF Superconductivity(SRF2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Progress on Characterization and Optimization of Multilayers2017

    • Author(s)
      C. Z. Antoine, M. Aburas, H Hayano, S Kato, T Kubo, T Saeki, Y Iwashita
    • Organizer
      18th International Conference on RF Superconductivity(SRF2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of Thin Film Coating on Superconductors2017

    • Author(s)
      Y. Iwashita, Y. Fuwa, H. Tongu, H. Hayano, T. Kubo, T. Saeki, M. Hino, H. Oikawa
    • Organizer
      8th International Particle Accelerator Conference(IPAC17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 三次高調波電圧誘導法による多層膜コーティング超伝導薄膜の評価2017

    • Author(s)
      片山 領,岩下 芳久,頓宮 拓,及川 大基,加藤 茂樹,久保 毅幸,佐伯 学行,早野 仁司,日野 正裕
    • Organizer
      第14回日本加速器学会年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] The next SRF technologies2016

    • Author(s)
      Takayuki Kubo
    • Organizer
      The International Workshop on Future Linear Colliders (LCWS2016)
    • Place of Presentation
      Aiina Center & MALIOS (岩手県盛岡市)
    • Year and Date
      2016-12-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導薄膜の特性測定2016

    • Author(s)
      岩下 芳久,頓宮 拓,不破 康裕,早野仁司, 佐伯 学行,久保 毅幸
    • Organizer
      第13回日本加速器学会年会
    • Place of Presentation
      幕張メッセ国際会議場(千葉県千葉市)
    • Year and Date
      2016-08-08
    • Related Report
      2016 Research-status Report
  • [Presentation] 薄膜超伝導体の高周波臨界磁場評価のためのニオブ製マッシュルーム型空洞の設計研究2016

    • Author(s)
      及川 大基,東口 武史,岩下 芳久,日野 正裕,久保 毅幸,加藤 茂樹,佐伯 学行,早野 仁司
    • Organizer
      第13回日本加速器学会年会
    • Place of Presentation
      幕張メッセ国際会議場(千葉県千葉市)
    • Year and Date
      2016-08-08
    • Related Report
      2016 Research-status Report
  • [Presentation] Reaching higher gradients in bulk Nb with nano-layer coating2016

    • Author(s)
      Takayuki Kubo
    • Organizer
      TESLA Technology Collaboration (TTC) meeting
    • Place of Presentation
      CEA (Saclay, France)
    • Year and Date
      2016-07-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of Measurement System for Superconducting Characteristics on Thin-film Samples at KEK2016

    • Author(s)
      T. Saeki, H. Hayano, T. Kubo, Y. Iwashita, H. Oikawa
    • Organizer
      The seventh International Particle Accelerator Conference(IPAC’16)
    • Place of Presentation
      BEXCO Convention Center(Busan, Korea)
    • Year and Date
      2016-05-08
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Magnetic fields in bulk, film, and multilayer superconductors in front of a multi-turn coil2016

    • Author(s)
      Takayuki Kubo
    • Organizer
      The seventh International Particle Accelerator Conference(IPAC’16)
    • Place of Presentation
      BEXCO Convention Center(Busan, Korea)
    • Year and Date
      2016-05-08
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] EVALUATION OF SC PROPERTY COATED ON A SURFACE2015

    • Author(s)
      Y. Iwashita, Y. Fuwa, M. Hino, T. Kubo, T. Saeki
    • Organizer
      SRF2015
    • Place of Presentation
      Whistler, BC, Canada
    • Year and Date
      2015-09-15
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2014-04-04   Modified: 2019-03-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi