| Project/Area Number |
18H01243
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山森 弘毅 国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究グループ長 (00358293)
中 竜大 東邦大学, 理学部, 講師 (00608888)
田仲 由喜夫 名古屋大学, 工学研究科, 教授 (40212039)
北嶋 直弥 東北大学, 学際科学フロンティア研究所, 助教 (50737955)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
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| Keywords | 暗黒物質アクシオン / ジョセフソン接合 / トポロジカル量子現象 / アクシオン / プリマコフ効果 / 共振効果 / 暗黒物質アキシオン / 超伝導接合 |
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| Outline of Final Research Achievements |
We aim to establish the basic concept of the interaction between Josephson junctions and axion, and to establish a method for searching for axion by using only laboratory-based devices. Initially, the experiment was carried out by detecting the signal related to the axion from the conductance of the Josephson junctions, but the structure originated by the axion was not observed. Therefore, we proceeded with theoretical analysis and experiments based on the resonantly generated magnetic field from the rf current. It was shown that the generated magnetic field resonantly increases by matching the rf frequency and the axion frequency, and can be measured by high-sensitivity magnetic field detection such as SQUID. Currently, we are developing a device with a unique structure that combines SQUID and Josephson junctions, and are now proceeding with measurements.
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| Academic Significance and Societal Importance of the Research Achievements |
アクシオン検出は世界的に多くの研究がおこなわれているが、従来行われてきた巨大施設を用いた検出方法とは異なる事件室系の装置のみを用いた、共鳴効果に基づく新しい検出方法を提案し、実際にジョセフソン素子とSQUIDを用いた観測を進めている。現状ではまだ観測には至っていないが、今後研究を進めることで、実験室系の装置のみでのアクシオン検出を実現することを目指している。アクシオンが実際に観測できれば、素粒子宇宙物理分野に多大な波及効果のある有意義な研究となる。
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