| 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 |
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| 研究期間 (年度) |
2022-04-01 – 2027-03-31
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| 研究課題ステータス |
交付 (2022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 | 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 |
We have completed the design and fabrication of several small test chips (16 detectors) with several backings including aluminium, niobium, palladium, etc. These detectors were tested at 1.6 K in the cryostat at Okayama University in both the frequency and the time domain, with time-dependent measurements taken on two detectors simultaneously. In the meantime, we are preparing for measurements at 100 mK in a cryostat at the University of Paris-Saclay in France. We have acquired measurement utilities for this experiment, as well as microwave circuit design allowing for these measurements without the use of multiplexing readout. Several tests are planned for the Aluminium chip at 100 mK which will be compared with those of the metal-free chip. We anticipate that these tests will be completed in the next 6 weeks at Paris Saclay.
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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
There was fabrication delay at the fabrication facility (AIST in the Tokyo area) who were doing renovations at their laboratory. These were completed and the fabrication was carried forward quickly. The tests at 100 mK were only started recently due to the lack of a 100 mK cryostat at Okayama University. We plan to continue doing higher temperature measurements at Okayama University after returning.
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| 今後の研究の推進方策 |
We will continue the 100 mK tests in the next few weeks. Depending on the results, we will work on some simulations as well as plan the next few rounds of experiments at higher temperatures at Okayama University. Once the optimal material has been chosen, we will begin to optimise the detector design as well as develop a larger array。
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