| Co-Investigator(Kenkyū-buntansha) |
石徹白 晃治 東北大学, ニュートリノ科学研究センター, 准教授 (20634504)
岸本 康宏 東北大学, ニュートリノ科学研究センター, 教授 (30374911)
大谷 知行 国立研究開発法人理化学研究所, 光量子工学研究センター, チームリーダー (50281663)
美馬 覚 国立研究開発法人情報通信研究機構, 未来ICT研究所神戸フロンティア研究センター, 研究員 (50721578)
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| Budget Amount *help |
¥150,930,000 (Direct Cost: ¥116,100,000、Indirect Cost: ¥34,830,000)
Fiscal Year 2023: ¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000)
Fiscal Year 2022: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
Fiscal Year 2021: ¥28,470,000 (Direct Cost: ¥21,900,000、Indirect Cost: ¥6,570,000)
Fiscal Year 2020: ¥37,440,000 (Direct Cost: ¥28,800,000、Indirect Cost: ¥8,640,000)
Fiscal Year 2019: ¥44,330,000 (Direct Cost: ¥34,100,000、Indirect Cost: ¥10,230,000)
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| Outline of Final Research Achievements |
We firstly realized CaF2 scintillating bolometer using a superconducting sensor (MMC) for signal readout from cryogenic temperatures (around 10 mK). We achieved an energy resolution of less than 0.5% at the energy of 4.3 MeV, where is the Q-value of 48Ca double beta decay, and a particle discrimination ability of 5.5σ between α- and β-ray events when position dependence is eliminated by analysis using sequential α decay events in the CaF2 crystal.
A high magnetic field (9T) environment was utilized and Q-values were measured for cavities manufactured using ultra-high purity copper/photonic assist technology and so on. The target Q-value of 1.0E+5 was achieved in the cavity using photonic-assist technology and high purity alumina crystals.
The development of a KID made of Al was successfully performed by measuring the quasiparticle number counting to be able to detect the target below 10eV signal.
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