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Proceedings Paper

GroundBIRD: observations of CMB polarization with fast scan modulation and MKIDs
Author(s): Shugo Oguri; Jihoon Choi; Thushara Damayanthi; Makoto Hattori; Masashi Hazumi; Hikaru Ishitsuka; Kenji Kiuchi; Ryo Koyano; Hiroki Kutsuma; Kyungmin Lee; Satoru Mima; Makoto Minowa; Makoto Nagai; Taketo Nagasaki; Chiko Otani; Yutaro Sekimoto; Munehisa Semoto; Jun’ya Suzuki; Tohru Taino; Osamu Tajima; Nozomu Tomita; Eunil Won; Tomohisa Uchida; Mitsuhiro Yoshida
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Paper Abstract

Polarized patterns in the cosmic microwave background (CMB) radiation contains rich knowledge for early stage of the universe. In particular their odd-parity patterns at large angular scale (> 1°), primordial B-modes, are smoking-gun evidence for the cosmic inflation. The GroundBIRD experiment aims to detect these B-modes with a ground-based apparatus that includes several novel devices: a high-speed rotational scan system, cold optics, and microwave kinetic inductance detectors (MKIDs). We plan to start observations in the Canary Islands in 2017. In this paper, we present the status of the development of our instruments. We established an environment that allows operation of our MKIDs in an optical configuration, in which the MKIDs observe radiations from the outside of the telescope aperture. We have also constructed MKID prototypes, and we are testing them in the optical configuration.

Paper Details

Date Published: 27 July 2016
PDF: 7 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99063L (27 July 2016); doi: 10.1117/12.2231672
Show Author Affiliations
Shugo Oguri, High Energy Accelerator Research Organization, KEK (Japan)
Jihoon Choi, Institute for Basic Science (Korea, Republic of)
Thushara Damayanthi, RIKEN (Japan)
Makoto Hattori, Tohoku Univ. (Japan)
Masashi Hazumi, High Energy Accelerator Research Organization, KEK (Japan)
Hikaru Ishitsuka, The Graduate Univ. for Advanced Studies (Japan)
Kenji Kiuchi, RIKEN (Japan)
Ryo Koyano, Saitama Univ. (Japan)
Hiroki Kutsuma, Tohoku Univ. (Japan)
Kyungmin Lee, Korea Univ. (Korea, Republic of)
Satoru Mima, RIKEN (Japan)
Makoto Minowa, The Univ. of Tokyo (Japan)
Makoto Nagai, Univ. of Tsukuba (Japan)
Taketo Nagasaki, High Energy Accelerator Research Organization, KEK (Japan)
Chiko Otani, RIKEN (Japan)
Yutaro Sekimoto, National Astronomical Observatory of Japan (Japan)
Munehisa Semoto, Saitama Univ. (Japan)
Jun’ya Suzuki, High Energy Accelerator Research Organization, KEK (Japan)
Tohru Taino, Saitama Univ. (Japan)
Osamu Tajima, High Energy Accelerator Research Organization, KEK (Japan)
Nozomu Tomita, The Univ. of Tokyo (Japan)
Eunil Won, Korea Univ. (Korea, Republic of)
Tomohisa Uchida, High Energy Accelerator Research Organization, KEK (Japan)
Mitsuhiro Yoshida, High Energy Accelerator Research Organization, KEK (Japan)

Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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