期刊
JOURNAL OF LOW TEMPERATURE PHYSICS
卷 184, 期 3-4, 页码 786-792出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-015-1420-9
关键词
Cosmic microwave background; Polarization; Microwave kinetic inductance detector
资金
- Ministry of Education, Culture, Sports, Science, and Technology, Japan (KAKENHI) [23684017, 25610064, 26105519, 26247045, 14J10972, 15H05448, 15H05743]
- Center for the Promotion of Integrated Sciences (CPIS) of SOKENDAI
- NAOJ
- Research Grants in the Natural Sciences from the Mitsubishi Foundation
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2013R1A1A2004972]
- Grants-in-Aid for Scientific Research [26105519, 14J10972, 25610064, 23684017, 15H05743, 26247045, 15H05448] Funding Source: KAKEN
- National Research Foundation of Korea [2013R1A1A2004972] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Cosmic microwave background (CMB) is an important source of information about the origin of our universe. In particular, odd-parity large angular scale patterns in the CMB polarization, the primordial B-modes, are strong evidence for an inflationary universe, related to the accelerating expansion of the metric. We are developing a unique telescope, GroundBIRD, to take CMB polarization measurements. The telescope combines novel techniques: high-speed rotation scanning, cold optics, and microwave kinetic inductance detectors (MKIDs). We evaluated the response of MKIDs on the rotation stage. Method of shielding from the geo-magnetic field is established. We have also developed a receiver cryostat. We are able to maintain a sufficient cold status for observations on the optical configuration. We plan to start commissioning the system by observing CMB in Japan in 2015-2016. We will then deploy GroundBIRD in the Canary Islands for further scientific observations.
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