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Development of a compact and continuous sub-millikelvin refrigerator

Research Project

Project/Area Number 15K13398
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field General applied physics
Research InstitutionThe University of Tokyo

Principal Investigator

FUKUYAMA Hiroshi  東京大学, 大学院理学系研究科(理学部), 教授 (00181298)

Co-Investigator(Kenkyū-buntansha) 村川 智  東京大学, 低温センター, 准教授 (90432004)
戸田 亮  東京大学, 低温センター, 技術職員 (20452203)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords磁気冷凍 / 断熱消磁冷凍 / 超低温 / 熱スイッチ / 熱接触 / 磁気シールド / 磁気冷却 / 核磁気断熱消磁冷却 / ミリケルビン
Outline of Final Research Achievements

Through detailed thermal and magnetic simulations, we have shown that a newly-designed adiabatic demagnetization refrigerator can produce and hold continuously ultra-low temperatures as low as one thousandth of a degree above absolute zero. As a magnetic working material, we use PrNi5 in which an applied magnetic field is effectively enhanced at the location of Pr nuclei. Relatively low magnetic fields up to one Tesla are applied to PrNi5 by a compact shielded superconducting magnet. Two such cooling units are connected in series via two superconducting heat switches in between a dilution refrigerator, a precooling stage, and a sample. By demagnetizing and magnetizing the two units alternately and cyclically, the system can keep ultra-low temperatures continuously. We have developed these main parts and confirmed that their performances are as planned.

Academic Significance and Societal Importance of the Research Achievements

絶対零度まで1/1000度の超低温環境を連続的に発生できる小型の新型冷凍機が実現できることを数値計算で示し、そのための主要な要素技術の開発に成功した。この冷凍機が最終的に完成すれば、物質の新現象や新機能を探る温度範囲を大きく拡げ、熱雑音を減らして観測機器の感度を著しく向上できるので、物質科学や宇宙・素粒子研究などさまざまな基礎研究の分野で新たな発見につながると期待される。本研究でその技術革新が大きく現実に近づいた。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (23 results)

All 2019 2018 2017 2016 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 2 results) Presentation (19 results) (of which Int'l Joint Research: 4 results) Remarks (1 results)

  • [Journal Article] Design and expected performance of a compact and continuous nuclear demagnetization refrigerator for sub-mK applications2018

    • Author(s)
      Toda Ryo、Murakawa Satoshi、Fukuyama Hiroshi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 969 Pages: 012093-012093

    • DOI

      10.1088/1742-6596/969/1/012093

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Possible quantum liquid crystal phases of helium monolayers2016

    • Author(s)
      S. Nakamura, K. Matsui, T. Matsui, and H. Fukuyama
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 18

    • DOI

      10.1103/physrevb.94.180501

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] A Compact Rotating 1K Cryostat for Helium 4 Studies2016

    • Author(s)
      Takahiko Makiuchi, Satoshi Murakawa, Keiya Shirahama
    • Journal Title

      Journal of Low Temperature Physics

      Volume: Online Issue: 5-6 Pages: 1-6

    • DOI

      10.1007/s10909-016-1709-3

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 小型連続核断熱消磁冷凍機実現に向けた小型熱スイッチの開発2019

    • Author(s)
      戸田亮、瀧本翔平、村川智、福山寛
    • Organizer
      総合技術研究会2019
    • Related Report
      2018 Annual Research Report
  • [Presentation] 小型連続核断熱消磁冷凍機用超伝導マグネットの開発2019

    • Author(s)
      瀧本翔平、戸田亮、村川智、福山寛
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 超小型サブミリケルビン連続冷凍システムの開発 III2018

    • Author(s)
      戸田亮、瀧本翔平、植松拓真、村川智、福山寛
    • Organizer
      日本物理学会第73 回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of a Compact and Low Heat-dissipation Shielded Superconducting Magnet Usable at Sub-mK Temperature2018

    • Author(s)
      Shohei Takimoto, Ryo Toda, Satoshi Murakawa, and Hiroshi Fukuyama
    • Organizer
      International Symposium on Quantum Fluids and Solids (QFS2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 小型超 低温連続冷凍システムの開発 II2018

    • Author(s)
      戸田亮、瀧本翔平、植松祐真、村川智、福山寛
    • Organizer
      2018 年度春季(第 96 回) 低温工学・超電導学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 超小型サブミリケルビン連続冷凍システムの開発III2018

    • Author(s)
      戸田亮、瀧本翔平、植松拓真、村川智、福山寛
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 超小型サブミリケルビン連続冷凍システムの開発II2017

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      日本物理学会第72回 年次大会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] 小型超低温連続冷凍システムの開発2017

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      総合技術研究会2017東京大学
    • Place of Presentation
      東京大学(東京都・文京区)
    • Year and Date
      2017-03-08
    • Related Report
      2016 Research-status Report
  • [Presentation] Compact nuclear demagnetization re- frigerator to keep a sub-mK temperature continu- ously - Design and expected performance2017

    • Author(s)
      Satoshi Murakawa, Ryo Toda, and Hiroshi Fukuyama
    • Organizer
      Inter- national Conference on Ultra Low Temperature Physics (ULT 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of compact and contin- uous nuclear demagnetization refrigerator2017

    • Author(s)
      Ryo Toda, Satoshi Murakawa, and Hiroshi Fukuyama
    • Organizer
      28th International Conference on Low Temperature Physics (LT28)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超小型サブミリケルビン連続冷凍システムの開発II2017

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      日本物理学会第72回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 小型超低温連続冷凍システムの開発2017

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      総合技術研究会2017
    • Related Report
      2017 Research-status Report
  • [Presentation] 小型超低温連続冷凍システムの開発2017

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      第8回低温センター研究交流会
    • Place of Presentation
      東京大学(東京都・文京区)
    • Related Report
      2016 Research-status Report
  • [Presentation] シアネートエステル樹脂の低温物性2016

    • Author(s)
      中村祥子、藤井武則、松川将治、片桐誠之、福山 寛
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Presentation] ”Development of Experiment for Direct Observation of Majorana Cone at Surface of Superfluid Helium Three B Phase2016

    • Author(s)
      S. Murakawa and K. Yoshida
    • Organizer
      International Conference on Quantum Fluids and Solids (QFS2016)
    • Place of Presentation
      Prague (Czech Republic)
    • Year and Date
      2016-08-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 小型超低温連続冷凍シス テムの開発I2016

    • Author(s)
      戸田亮、村川智、福山寛
    • Organizer
      2016年度春季第93回春季低温工学・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
      2016-05-30
    • Related Report
      2016 Research-status Report
  • [Presentation] 小型超低温連続冷凍システムの開発 I2016

    • Author(s)
      戸田 亮, 村川 智, 福山 寛
    • Organizer
      第93回低温工学・超電導学会
    • Place of Presentation
      タワーホール船橋(東京都・江戸川区)
    • Year and Date
      2016-05-30
    • Related Report
      2015 Research-status Report
  • [Presentation] 低温センター共同利用部門紹介2016

    • Author(s)
      戸田 亮
    • Organizer
      東京大学全学技術発表会
    • Place of Presentation
      東京大学(東京都・文京区)
    • Year and Date
      2016-03-10
    • Related Report
      2015 Research-status Report
  • [Presentation] 低温センター共同利用部門紹介2016

    • Author(s)
      戸田 亮
    • Organizer
      第7回東京大学低温センター研究交流会
    • Place of Presentation
      東京大学(東京都・文京区)
    • Year and Date
      2016-02-26
    • Related Report
      2015 Research-status Report
  • [Remarks] 小型超低温連続冷凍システムの開発

    • URL

      http://kelvin.phys.s.u-tokyo.ac.jp/files/CNDR_cssj_160509.pdf

    • Related Report
      2018 Annual Research Report 2017 Research-status Report

URL: 

Published: 2015-04-16   Modified: 2020-03-30  

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