Precise polarization angle calibration for CMB polarization experiments
| Project/Area Number |
26800125
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | High Energy Accelerator Research Organization (2015-2016)
The University of Tokyo (2014) |
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Principal Investigator |
Nishino Haruki 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 特任助教 (80706804)
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| Research Collaborator |
FUJINO Takuro 横浜国立大学, 大学院工学府, 大学院生
Jaehnig Greg University of Colorado, Boulder・Physics Department, 大学院生
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 宇宙マイクロ波背景放射 / インフレーション宇宙論 / 偏光 |
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| Outline of Final Research Achievements |
Polarization measurements of the Cosmic Microwave Background (CMB) is a unique tool to probe the beginning of the universe. The inflation theory predicts that the primordial gravitational wave from the inflationary universe created polarization patterns called B-mode in the CMB polarization. To mitigate possible systematic errors from miscalibrations of polarization angles, this research has been performed to improve angle calibrations for CMB experiments. I have been focusing on the bright polarized celestial source, called Tau A (a.k.a. the Crab Nebula). We published the Tau A polarization measurement result from the POLARBEAR observation data. Although it achieved 0.2-degree statistical error, the systematic error was not negligibly small. Also, another study for a new multi-frequency Tau A measurement system is conducted. We are planning to start observations with the new system in the coming year.
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Report
(4 results)
Research Products
(22 results)
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[Presentation] POLARBEAR-2統合試験に向けた検出器読み出し・データ収集系の構築2017
Author(s)
西野玄記, 秋葉祥希, 井上優貴, 片山伸彦, 金子大輔, 鈴木有春, 鈴木純一, 瀬川優子, 高倉理, 高取沙悠理, 高田卓, 田邉大樹, 茅根裕司, 都丸隆行, 羽澄昌史, 長谷川雅也, 服部香里, 濱田崇穂, 松村知岳, 他POLARBEAR-2 コラボレーション
Organizer
日本物理学会第72回年次大会
Place of Presentation
大阪大学（大阪府豊中市）
Year and Date
2017-03-17
Related Report
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[Presentation] POLARBEAR-2のための検出器読み出し・望遠鏡制御システム試験2016
Author(s)
西野玄記, 秋葉祥希, 井上優貴, 片山伸彦, 鈴木有春, 鈴木純一, 瀬川優子, 高倉理, 高取沙悠理, 高田卓, 茅根裕司, 都丸隆行, 羽澄昌史, 長谷川雅也, 服部香里, 濱田崇穂, 松村知岳, 他POLARBEAR-2 コラボレーション
Organizer
日本物理学会2016年秋季大会
Place of Presentation
宮崎大学（宮崎県宮崎市）
Year and Date
2016-09-21
Related Report
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[Presentation] 宇宙マイクロ波背景放射偏光観測実験 POLARBEAR-2 計画の進展2016
Author(s)
西野玄記, 秋葉祥希, 井上優貴, 片山伸彦, 鈴木有春, 鈴木純一, 瀬川優子, 高倉理, 高取沙悠理, 高田卓, 茅根裕司, 都丸隆行，羽澄昌史, 長谷川雅也，服部香里，濱田崇穂, 松村知岳, 他 POLARBEAR-2 コラボレーション
Organizer
日本天文学会2016年秋季年会
Place of Presentation
愛媛大学（愛媛県松山市）
Year and Date
2016-09-14
Related Report
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