Solar axion search utilizing TES microcalorimeters

• Project/Area Number: 18H01244
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: National Astronomical Observatory of Japan (2019-2021); Japan Aerospace EXploration Agency (2018)
• Principal Investigator: Mitsuda Kazuhisa 国立天文台, 先端技術センター, 特任教授 (80183961)
• Co-Investigator(Kenkyū-buntansha): 山崎 典子 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (20254146) ; 前畑 京介 帝京大学, 公私立大学の部局等, 教授 (30190317)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
• Keywords: アクシオン / 太陽アクシオン / マイクロカリメータ / 超伝導転移端 / マイクロカロリメータ / 超伝導遷移端 / TES型マイクロカロリメータ

Outline of Final Research Achievements

We have studied the methods to solve the four main challenges in realizing a TES-type microcalorimeter with 57Fe thin film as a solar-axion converter by elemental prototyping and electromagnetic field simulation. We then designed and fabricated a TES microcalorimeter based on the solutions, and evaluated it by X-ray irradiation. As a result, it was found that the waveform at the rising edge of the signal varied greatly, and the cause of this variation was investigated by simulating the thermal response of the detector. As a result, it was suggested that the thermal conductivity of the gold thin film was insufficient, and a fabrication method was developed to improve it. Based on these results, we designed an 8x8 format array element and prepared for signal readout by microwave frequency-space signal multiplexing.

Academic Significance and Societal Importance of the Research Achievements

TES型マイクロカロリメータアレイ検出器は優れたエネルギー分解能が特徴であり，宇宙X線観測に加えて，高エネルギー分解能で得られる低バックグラウンドを生かした稀事象探査への応用が特に期待される。本研究は稀事象探査の一つとして太陽アクシオン探査を目標とする。本研究により64画素の検出器を実現する基礎的な知見が得られた。本格的な探査には千以上の素子が必要である。信号読み出し回路を含めたシステム全体はスケーラブルであるので，時間と経費をかけることで実現の可能性は高い。また，今回研究した熱への変換物質をTESの横に配置する方式は応用性が高く，他の稀事象探査への応用も期待される。

Research Products

• [Int'l Joint Research] INAF IAPS(イタリア)
• [Journal Article] Low-noise microwave SQUID multiplexed readout of 38 x-ray transition-edge sensor microcalorimeters (2020)
  • Author(s): Nakashima Y.、Hirayama F.、Kohjiro S.、Yamamori H.、Nagasawa S.、Sato A.、Yamada S.、Hayakawa R.、Yamasaki N. Y.、Mitsuda K.、Nagayoshi K.、Akamatsu H.、Gottardi L.、Taralli E.、Bruijn M. P.、Ridder M. L.、Gao J. R.、den Herder J. W. A.
  • Journal Title: Applied Physics Letters Volume: 117 Issue: 12 Pages: 122601-122601
  • DOI: 10.1063/5.0016333
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of TES Microcalorimeters with Solar-Axion Converter (2020)
  • Author(s): Konno, R., Maehisa, K., Mitsuda, K., Yamasaki, NY., Yamamoto, R., Hayashi, T., Muramatsu, H., Nakashima, Y., Maehata, K., Homma, T., Saito, M., Sugie, M., Sato, R.
  • Journal Title: JOURNAL OF LOW TEMPERATURE PHYSICS Volume: 199 Issue: 3-4 Pages: 654662-654662
  • DOI: 10.1007/s10909-019-02257-9
  • Peer Reviewed
• [Journal Article] A search for a contribution from axion-like particles to the X-ray diffuse background utilizing the Earth's magnetic field (2020)
  • Author(s): Yamamoto R.、Yamasaki N.Y.、Mitsuda K.、Takada M.
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2020 Issue: 02 Pages: 011-011
  • DOI: 10.1088/1475-7516/2020/02/011
  • Peer Reviewed / Open Access
• [Presentation] Performance of TES X-Ray Microcalorimeters Designed for 14.4 keV Solar Axion Search (2021)
  • Author(s): Yuta Yagi, Ryohei Konno, Tasuku Hayashi, Keita Tanaka, Noriko Y. Yamasaki, Kazuhisa Mitsuda, Rumi Sato, Mikiko Saito, Takayuki Homma, Yoshiki Nishida, Shohei Mori, Naoko Iyomoto
  • Organizer: 19th International Workshop on Low Temperature Detectors
  • Int'l Joint Research
• [Presentation] Development of microwave multiplexer for the Super DIOS mission: 38 transition-edge sensor X-ray microcalorimeter readout with microwave multiplexing (2020)
  • Author(s): Y. Nakashima, F. Hirayama, S. Kohjiro, H. Yamamori, S. Nagasawa, A. Sato, S. Yamada, R. Hayakawa, N. Y. Yamasaki, K. Mitsuda, K. Nagayoshi, H. Akamatsu, L. Gottardi, E. Taralli, M. P. Bruijn , M. L. Ridder, J. R. Gao, and J. W. A. den Herder
  • Organizer: SPIE Astronomical Telescopes and Instrumentation
  • Int'l Joint Research
• [Presentation] Simultaneous Readout of 38-pixels Ti/Au X-ray Transition Edge Sensor with a Microwave Multiplexer Based on Resonators Directly Coupled to RF-SQUIDs with Noise of 10 pA/√Hz (2020)
  • Author(s): Y. Nakashima, F. Hirayama, S. Kohjiro, H. Yamamori, S. Nagasawa, A. Sato, S. Yamada, R. Hayakawa, N. Y. Yamasaki, K. Mitsuda, K. Nagayoshi, H. Akamatsu, L. Gottardi, E. Taralli, M. P. Bruijn , M. L. Ridder, J. R. Gao, and J. W. A. den Herder
  • Organizer: Applied Superconductivity Conference 2020
  • Int'l Joint Research
• [Presentation] 太陽アクシオン探査に特化した吸収体を持つ TES 型マイクロカロリメータの開発２ (2020)
  • Author(s): 紺野良平, 前久景星, 満田和久, 山崎典子, 山本亮, 林佑, 村松はるか, 中島裕貴, 八木雄大, 本間敬之, 斎藤美紀子, 杉江美紗貴, 佐藤瑠美
  • Organizer: 日本物理学会2020年年次大会
• [Presentation] Development of TES microcalorimeters for solar axion search (2019)
  • Author(s): Konno, Mitsuda, K. Yamasaki, N.Y., Yamamoto, R., Hayashi, T., Muramatsu, H., Homma, T., Saitou, M., Sugie, M., Satou, R.
  • Organizer: 18th International Workshop on Low Temperature Detectors
  • Int'l Joint Research
• [Presentation] Microwave Multiplexing Based on SQUIDs Directly Coupled to Resonators with a View to Simultaneous Readout of 80 TES X-ray Microcalorimeters (2019)
  • Author(s): Nakashima, Y., Hirayama, F., Kohjiro, S., Yamamori, H., Nagasawa, S., Sato, A., Yamasaki, N.Y., Mitsuda, K.
  • Organizer: 18th International Workshop on Low Temperature Detectors
  • Int'l Joint Research
• [Presentation] 太陽アクシオン探査に特化した吸収体を持つTES型マイクロカロリメータの開発 (2019)
  • Author(s): 紺野良平, 満田和久, 山崎典子, 山本亮, 林佑, 村松はるか, 前久景星, 本間敬之, 斎藤美紀子, 杉江美紗貴
  • Organizer: 日本物理学会 第74回年次大会（2019年3月14日-2019年3月17日）