Design and development of a polarization modulator unit based on a continuous rotating half-wave plate for LiteBIRD

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 IshinoShogo Nakamura, Akito Kusaka, Charles Hill, Masashi Hazumi, Hirokazu Kataza, Shin Utsunomiya, Ryo Yamamoto, Makoto Tashiro, Yukikatsu Terada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
EditorsJonas Zmuidzinas, Jian-Rong Gao
PublisherSPIE
ISBN (Print)9781510619692
DOIs
Publication statusPublished - 2018
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 - Austin, United States
Duration: Jun 12 2018Jun 15 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10708
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018
CountryUnited States
CityAustin
Period6/12/186/15/18

Keywords

  • Cosmic microwave background
  • LiteBIRD
  • broadband achromatic half-wave plate
  • cryogenic rotation mechanism
  • inflation
  • millimeter-wave polarization
  • polarization modulator
  • space program

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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