2018 Fiscal Year Final Research Report
Development of the liquid helium TPC with superconducting detectors and search for light dark matter
| Project/Area Number |
26287047
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Okayama 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)
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| Research Collaborator |
Yamada Yousuke
Kida Yousuke
Hidehira Naoto
Kibayashi Atsuko
Kohjiro Satoshi
Hirayama Fuminori
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| Project Period (FY) |
2014-04-01 – 2019-03-31
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| Keywords | 暗黒物質 / 超伝導検出器 / 周波数領域多重化 / 力学的インダクタンス |
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| Outline of Final Research Achievements |
We have developed photon sensors using superconducting material for the detection of scintillation light emitted from Helium atoms recoiled by dark matter particles. We have established a fabrication procedure to have about 3% uniformity for 50 detectors on 1cm silicon substrate. We have successfully read out photon 10 usec pulse signals for the 20 sensors using a single wire. We have demonstrated that the sensors developed so far have the potential sufficient for use of a search for dark matter particles with necessary conditions which we have identified.
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| Free Research Field |
宇宙・素粒子実験
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果とし得られた大面積かつ高感度で極低温で作動する超伝導光検出器とその読み出しシステムは、本研究の主題である軽い暗黒物質探索のみならず、X線・γ線・中性子線といった放射線の高精度測定にも転用することができ、学術的波及効果は大きいと考える。半導体検出器では不可能であった可視光のみならず赤外線から紫外線の幅広い波長領域での量子イメージングを単一技術で可能となるので、社会的意義も大きいと考える。
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