Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope

Kunimoto Komatsu, Tomotake Matsumura, Masashi Hazumi, Hiroaki Imada, Hirokazu Ishino, Nobuhiko Katayama, Yuki Sakurai, Hajime Sugai, Ryota Takaku

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

4 Citations (Scopus)

Abstract

LiteBIRD is a satellite project to measure the polarization of the CMB with an unprecedented accuracy. LiteBIRD observes all sky for three years at the sun-earth second Lagrange point. The goal of LiteBIRD is to observe the B-mode polarization at large angular scales and to measure the tensor-to-scaler ratio r with an accuracy less than 0.001, exploring the energy scale of the inflation. In order to mitigate the system 1/f noise and systematics, we plan to use continuous rotating half-wave plates (HWPs) as a polarization modulator at each aperture of two telescopes. One of the telescopes, called a low frequency telescope (LFT), covers the frequency range from 34 to 270 GHz, requiring the HWP to have a high modulation efficiency in the wide bandwidth. We employ a Pancharatnam-type achromatic HWP (AHWP) to achieve the broadband coverage. The AHWP consists of nine layer stacked HWPs with the optic axes mutually rotated by the angles optimized for the LFT bandwidth. In this paper, we report our development status of the nine layer AHWP and measurement results on the modulation efficiency and the phase as a function of frequency.

Original languageEnglish
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
EditorsJonas Zmuidzinas, Jian-Rong Gao
PublisherSPIE
Volume10708
ISBN (Print)9781510619692
DOIs
Publication statusPublished - Jan 1 2018
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 - Austin, United States
Duration: Jun 12 2018Jun 15 2018

Other

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

Fingerprint

Telescopes
Telescope
Low Frequency
prototypes
telescopes
Prototype
low frequencies
Polarization
evaluation
Evaluation
Modulation
polarization
Bandwidth
scalers
bandwidth
modulation
1/f Noise
Modulator
Sun
Lagrange

Keywords

  • Achromatic half-wave plate
  • B-mode
  • CMB polarization
  • Space mission

ASJC Scopus subject areas

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

Cite this

Komatsu, K., Matsumura, T., Hazumi, M., Imada, H., Ishino, H., Katayama, N., ... Takaku, R. (2018). Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope. In J. Zmuidzinas, & J-R. Gao (Eds.), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX (Vol. 10708). [1070847] SPIE. https://doi.org/10.1117/12.2312431

Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope. / Komatsu, Kunimoto; Matsumura, Tomotake; Hazumi, Masashi; Imada, Hiroaki; Ishino, Hirokazu; Katayama, Nobuhiko; Sakurai, Yuki; Sugai, Hajime; Takaku, Ryota.

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. ed. / Jonas Zmuidzinas; Jian-Rong Gao. Vol. 10708 SPIE, 2018. 1070847.

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

Komatsu, K, Matsumura, T, Hazumi, M, Imada, H, Ishino, H, Katayama, N, Sakurai, Y, Sugai, H & Takaku, R 2018, Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope. in J Zmuidzinas & J-R Gao (eds), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. vol. 10708, 1070847, SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018, Austin, United States, 6/12/18. https://doi.org/10.1117/12.2312431
Komatsu K, Matsumura T, Hazumi M, Imada H, Ishino H, Katayama N et al. Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope. In Zmuidzinas J, Gao J-R, editors, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. Vol. 10708. SPIE. 2018. 1070847 https://doi.org/10.1117/12.2312431
Komatsu, Kunimoto ; Matsumura, Tomotake ; Hazumi, Masashi ; Imada, Hiroaki ; Ishino, Hirokazu ; Katayama, Nobuhiko ; Sakurai, Yuki ; Sugai, Hajime ; Takaku, Ryota. / Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. editor / Jonas Zmuidzinas ; Jian-Rong Gao. Vol. 10708 SPIE, 2018.
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