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액시온 및 극한상호작용 연구단
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GroundBIRD: Observation of CMB Polarization with a Rapid Scanning and MKIDs

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Title
GroundBIRD: Observation of CMB Polarization with a Rapid Scanning and MKIDs
Author(s)
Nagasaki, T; Jihoon Choi; Genova-Santos, RT; Hattori, M; Hazumi, M; Ishitsuka, H; Karatsu, K; Kikuchi, K; Koyano, R; Kutsuma, H; Lee, K; Mima, S; Minowa, M; Nagai, M; Naruse, M; Oguri, S; Otani, C; Rebolo, R; Rubino-Martin, JA; Sekimoto, Y; Semoto, M; Suzuki, J; Taino, T; Tajima, O; Tomita, N; Uchida, T; Won, E; Yoshida, M
Publication Date
2018-12
Journal
JOURNAL OF LOW TEMPERATURE PHYSICS, v.193, no.5-6, pp.1066 - 1074
Publisher
SPRINGER/PLENUM PUBLISHERS
Abstract
Cosmic microwave background (CMB) radiation is an afterglow from the Big Bang. CMB contains rich information about the early stage of the universe. In particular, odd-parity patterns (B-mode) in the CMB polarization on a large angular scale would provide an evidence of the cosmic inflation. The aim of the GroundBIRD experiment is to observe the B-mode on large angular scales from the ground. One of the most novel characteristics of the telescope used for this experiment is its rapid rotational scanning technique. In addition, the telescope uses cold optics and microwave kinetic inductance detectors. We have developed a telescope mount with a three-axis rotation mechanism (azimuth, elevation, and boresight) and measured the vibration at the focal plane stage at 20 RPM scan rotation rate. We also performed focal plane detector tests on this mount. The tests confirmed the expected response from the geomagnetism associated with the mount rotation. We have also developed a design for the magnetic shields and a detector array on a 3-in wafer. The preparations to begin the observations at the Teide Observatory in the Canary Islands in 2018 are proceeding smoothly.© Springer Science+Business Media, LLC, part of Springer Nature 2018
URI
https://pr.ibs.re.kr/handle/8788114/6215
ISSN
0022-2291
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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