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Design and development of a polarization modulator unit based on a continuous rotating half-wave plate for LiteBIRD
Author(s): Yuki Sakurai; Tomotake Matsumura; Nobuhiko Katayama; Hiroaki Imada; Kunimoto Komatsu; Hiroaki Kanai; Ryota Takaku; Shinya Sugiyama; Tommaso Ghigna; Teruhito Iida; Hajime Sugai; Hiroyuki Ohsaki; Yutaka Terao; Toshiki Shimomura; Kuniaki Konishi; Haruyuki Sakurai; Junji Yumoyo; Muneyoshi Maki; Junichi Suzuki; Hirokazu Ishino; Shogo Nakamura; Akito Kusaka; Charles Hill; Masashi Hazumi; Hirokazu Kataza; Shin Utsunomiya; Ryo Yamamoto; Makoto Tashiro; Yukikatsu Terada
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Paper Abstract

We present our design and development of a polarization modulator unit (PMU) for LiteBIRD space mission. LiteBIRD is a next generation cosmic microwave background (CMB) polarization satellite to measure the primordial B-mode. The science goal of LiteBIRD is to measure the tensor-to-scalar ratio with the sensitivity of δr < 10-3. The baseline design of LiteBIRD is to employ the PMU based on a continuous rotating half-wave plate (HWP) at a telescope aperture with a diameter of 400 mm. It is an essential for LiteBIRD to achieve the science goal because it significantly reduces detector noise and systematic uncertainties. The LiteBIRD PMU consists of a multi-layered sapphire as a broadband achromatic HWP and a mechanism to continuously rotate it at 88 rpm. The whole system is maintained at below 10K to minimize the thermal emission from the HWP. In this paper, we discuss the current development status of the broadband achromatic HWP and the cryogenic rotation mechanism.

Paper Details

Date Published: 9 July 2018
PDF: 12 pages
Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107080E (9 July 2018); doi: 10.1117/12.2312391
Show Author Affiliations
Yuki Sakurai, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
Tomotake Matsumura, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
Nobuhiko Katayama, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
Hiroaki Imada, Lab. de l'Accélérateur Linéaire, Univ. Paris-Sud (France)
Kunimoto Komatsu, Okayama Univ. (Japan)
Hiroaki Kanai, Yokohama National Univ. (Japan)
Ryota Takaku, The Univ. of Tokyo (Japan)
Shinya Sugiyama, Saitama Univ. (Japan)
Tommaso Ghigna, Univ. of Oxford (United Kingdom)
Teruhito Iida, ispace, Inc. (Japan)
Hajime Sugai, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
Hiroyuki Ohsaki, The Univ. of Tokyo (Japan)
Yutaka Terao, The Univ. of Tokyo (Japan)
Toshiki Shimomura, The Univ. of Tokyo (Japan)
Kuniaki Konishi, The Univ. of Tokyo (Japan)
Haruyuki Sakurai, The Univ. of Tokyo (Japan)
Junji Yumoyo, The Univ. of Tokyo (Japan)
Muneyoshi Maki, High Energy Accelerator Research Organization (Japan)
Junichi Suzuki, High Energy Accelerator Research Organization (Japan)
Hirokazu Ishino, Okayama Univ. (Japan)
Shogo Nakamura, Yokohama National Univ. (Japan)
Akito Kusaka, The Univ. of Tokyo (Japan)
Lawrence Berkeley National Lab. (United States)
Charles Hill, Lawrence Berkeley National Lab. (United States)
Univ. of California, Berkeley (United States)
Masashi Hazumi, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
High Energy Accelerator Research Organization, KEK (Japan)
Hirokazu Kataza, Japan Aerospace Exploration Agency (Japan)
Institute of Space and Astronautical Science (Japan)
Shin Utsunomiya, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
The Univ. of Tokyo (Japan)
Ryo Yamamoto, Japan Aerospace Exploration Agency (Japan)
Institute of Space and Astronautical Science (Japan)
Makoto Tashiro, Saitama Univ. (Japan)
Yukikatsu Terada, Saitama Univ. (Japan)


Published in SPIE Proceedings Vol. 10708:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
Jonas Zmuidzinas; Jian-Rong Gao, Editor(s)

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