The observation of CMB polarization with the combination of the novel IR-filter
| Project/Area Number |
15H05448
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Institute of Physical and Chemical Research (2016-2018)
High Energy Accelerator Research Organization (2015) |
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Principal Investigator |
Oguri Shugo 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, 基礎科学特別研究員 (20751176)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥23,140,000 (Direct Cost: ¥17,800,000、Indirect Cost: ¥5,340,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
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| Keywords | 宇宙物理 / CMB |
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| Outline of Final Research Achievements |
I improved the performance of the telescope for the CMB experiment, "GroundBIRD", by RT-MLI which I invented. RT-MLI is a new-type IR filter which is cooled by a similar principle to conventional multi-layer insulation. I success to cool down the super-conducting detector at 0.20 K with the optical loading from a 300-K black body.
I also evaluated the performance of the telescope using a detector fabricated by SRON. I confirmed that GoundBIRD has enough performance to the original design. Now, GroundBIRD telescope is almost ready to start the observation in Spain.
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| Academic Significance and Societal Importance of the Research Achievements |
電波望遠鏡は、「大型化」と「検出器の冷却」によって高感度化を実現する。しかし、大型化が進むと光を取り入れる窓からの熱流入が増加し、検出器の冷却が難しくなるため、この二つを高い次元で両立する技術が求められていた。本研究は、その技術を編み出し、本格的に応用した最初の例である。申請者が発明したRT-MLIの技術をCMB偏光観測装置に応用し、期待以上の断熱性を実現できた。この技術は他の電波望遠鏡にも容易に適用可能で、業界全体のブレークスルーをもたらすと期待している。
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Report
(5 results)
Research Products
(27 results)
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[Journal Article] GroundBIRD: Observing Cosmic Microwave Polarization at Large Angular Scale with Kinetic Inductance Detectors and High-Speed Rotating Telescope2016
Author(s)
S. Oguri, J. Choi, T. Damayanthi, M. Hattori, M. Hazumi, H. Ishitsuka, K. Karatsu, S. Mima, M. Minowa, T. Nagasaki, C. Otani, Y. Sekimoto, O. Tajima, N. Tomita, M. Yoshida, E. Won
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Journal Title
J. Low Temp
Volume: online 30 Dec.
Pages: 1-7
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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