| 研究課題/領域番号 |
22K14060
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分15020:素粒子、原子核、宇宙線および宇宙物理に関連する実験
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| 研究機関 | 岡山大学 |
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研究代表者 |
Stever Samantha 岡山大学, 環境生命自然科学学域, 助教 (20842991)
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| 研究期間 (年度) |
2022-04-01 – 2025-03-31
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| 研究課題ステータス |
中途終了 (2023年度)
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| 配分額 *注記 |
4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円)
2026年度: 780千円 (直接経費: 600千円、間接経費: 180千円)
2025年度: 520千円 (直接経費: 400千円、間接経費: 120千円)
2024年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円)
2023年度: 650千円 (直接経費: 500千円、間接経費: 150千円)
2022年度: 1,690千円 (直接経費: 1,300千円、間接経費: 390千円)
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| キーワード | phonon mitigation / microwave detector / resonator / MKID / superconductivity / radiation resistance / systematic effects / mm-wave |
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| 研究開始時の研究の概要 |
We will carry out the work first produced by Karatsu et al. (2019) on the development of radiation-resistant MKID arrays. Building upon previous work, we will develop and test multiple low-Tc materials and designs in order to optimise effectiveness and reduce array dead time to <1% that of an unmitigated array, with multiple device types tested. We will optimise the design based on these results and subsequent modelling. By the end of this project we aim to achieve a large array (10,000 detectors) for such a targeted study.
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| 研究実績の概要 |
During the research period so far, we have collaborated with AIST (Tsukuba) to fabricate several microwave resonator designs with varying low T_c films for phonon absorption. We have characterised these detectors at Okayama University, and also at Paris-Saclay university for an aluminium-backed detector requiring subkelvin cryogenics.
We have produced a microwave circuit at room temperature which allows us to measure two detectors in the time domain simultaneously. We are in the process of using this circuit to measure the co-incidence from laser pulses or radiation, in order to verify the phonon absorption of the thin film.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
It is progressing smoothly.
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| 今後の研究の推進方策 |
We plan to produce another aluminium thin film backed device because the current one has an electrical short. Following that, we will characterise its frequency response before irradiating it again in a dilution fridge at KEK (Tsukuba).
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