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Search for dark matter with superconducting device

Research Project

Project/Area Number 16K13793
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionTohoku University

Principal Investigator

Tokiyasu Atsushi  東北大学, 電子光理学研究センター, 助教 (40739471)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords暗黒物質 / アクシオン / 超電導素子 / ジョセフソン接合 / 実験核物理 / 半導体検出器 / 極低温検出器 / 宇宙物理 / 超伝導材料・素子 / 素粒子実験 / 低温物性
Outline of Final Research Achievements

The purpose of this research is to perform the search for the missing particle, axion. Axion is one of the candidate of the cosmic dark matter. An axion is believed to be converted to one photon under a strong magnetic field. There is a theoretical approach that a strong magnetic field exists inside SNS-type superconducting devices. In the current and conductance curve of such device, a peak structure corresponding axion signal may appear. Based on this idea, we constructed a SNS-type superconducting device, and measured the current-conductance curve. Due to the large noize, we were not able to observe axion signal in the spectrum. We also clarified the controversial points of the theoretical prediction in the discussion with some other groups.

Academic Significance and Societal Importance of the Research Achievements

本研究は、超電導素子を用いて宇宙暗黒物質を探索するというものであり、物性物理学分野、素粒子実験物理学分野の協奏の下に研究を行った。暗黒物質探索は通常、数百人規模の大規模実験で大型装置を用いて行うが、数人から構成される比較的小さな研究グループで大グループに比肩する研究が行えるということを示した点で重要である。また、このような複数分野の知識、技術を横断した研究は、学際的に大きな意義がある。今後さらなる共同研究の可能性が開拓されたといえる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017

All Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Presentation] アクシオン探索実験のための極低温下で動作する電子検出器の開発2019

    • Author(s)
      時安敦史
    • Organizer
      ELPH Symposium 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 原子・原子核・核子を用いた素粒子標準理論を超える物理への挑戦2018

    • Author(s)
      時安敦史
    • Organizer
      日本物理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] AXION in Japan2018

    • Author(s)
      A.O. Tokiyasu
    • Organizer
      Revealing the history of the universe with underground particle and nuclear research 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導素子を用いたアクシオン探索について2018

    • Author(s)
      時安 敦史
    • Organizer
      TIAかけはし事業「簡単・便利な超伝導計測」研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 超伝導素子を用いたアクシオン探索について2018

    • Author(s)
      時安 敦史
    • Organizer
      名大KMI分野横断セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] アクシオン探索実験について2017

    • Author(s)
      時安敦史
    • Organizer
      ダークマターの懇談会
    • Place of Presentation
      神戸大学梅田インテリジェントラボラトリ、大阪
    • Year and Date
      2017-01-27
    • Related Report
      2016 Research-status Report
  • [Presentation] Axion search experiment by using Josephson-Junction device2017

    • Author(s)
      Atsushi Tokiyasu
    • Organizer
      17th international workshop on low temperature detectors
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2021-02-19  

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