TY - GEN
T1 - Breadboard model of the polarization modulator unit based on a continuously rotating half-wave plate for the low-frequency telescope of the LiteBIRD space mission
AU - Sakurai, Yuki
AU - Matsumura, Tomotake
AU - Katayama, Nobuhiko
AU - Komatsu, Kunimoto
AU - Takaku, Ryota
AU - Sugiyama, Shinya
AU - Nomura, Yoshiki
AU - Toda, Takayuki
AU - Ghigna, Tommaso
AU - Iida, Teruhito
AU - Sugai, Hajime
AU - Imada, Hiroaki
AU - Hazumi, Masashi
AU - Ishino, Hirokazu
AU - Ohsaki, Hiroyuki
AU - Terao, Yutaka
AU - Enokida, Hisashi
AU - Ishida, Yusuke
AU - Iwata, Yosuke
AU - Ahmad, Doa
AU - Konishi, Kuniaki
AU - Sakurai, Haruyuki
AU - Yumoto, Junji
AU - Kuwata-Gonokami, Makoto
AU - Kusaka, Akito
AU - Hill, Charles
N1 - Funding Information:
This work is supported in Japan by the World Premier International Research Center Initiative (WPI) of MEXT, by the JSPS Core-to-Core Program of A. Advanced Research Networks, by ISAS/JAXA for Pre-Phase A2 studies, by the acceleration program of JAXA research and development directorate, by the New Energy and Industrial Technology Development Organization (NEDO) project “Development of advanced laser processing with intelligence based on high-brightness and high efficiency laser technologies”, by Council for Science, Technology and Innovation (CSTI), by Cross-ministerial Strategic Innovation Promotion Program (SIP), and by JSPS KAK-ENHI Grant Numbers 17H01125, 17K14272, 18J20148, 18KK0083, 19K14732, JP15H05891, JP17H01115, and JP17H01125. The Italian LiteBIRD phase A contribution is supported by the Italian Space Agency (ASI Grants No. 2020-9-HH.0 and 2016-24-H.1-2018), the National Institute for Nuclear Physics (INFN) and the National Institute for Astrophysics (INAF). The French LiteBIRD phase A contribution is supported by the Centre National d’Etudes Spatiale (CNES), by the Centre National de la Recherche Scientifique (CNRS), and by the Commissariat à l’Energie Atomique (CEA). The Canadian contribution is supported by the Canadian Space Agency. The US contribution is supported by NASA grant no. 80NSSC18K0132. Norwegian participation in LiteBIRD is supported by the Research Council of Norway (Grant No. 263011). The Spanish LiteBIRD phase A contribution is supported by the Spanish Agencia Estatal de Investigación (AEI), project refs. PID2019-110610RB-C21 and AYA2017-84185-P. Funds that support contributions from Sweden come from the Swedish National Space Agency (SNSA/Rymdstyrelsen) and the Swedish Research Council (Reg. no. 2019-03959). The German participation in LiteBIRD is supported in part by the Excellence Cluster ORIGINS, which is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy (Grant No. EXC-2094 - 390783311). This research used resources of the Central Computing System owned and operated by the Computing Research Center at KEK, as well as resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy.
Publisher Copyright:
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PY - 2020
Y1 - 2020
N2 - We present a breadboard model development status of the polarization modulator unit (PMU) for a low-frequency telescope (LFT) of the LiteBIRD space mission. LiteBIRD is a next-generation cosmic microwave background polarization satellite to measure the primordial B-mode with the science goal of σr < 0.001. The baseline design of LiteBIRD consists of reflective low-frequency and refractive medium-And-high-frequency telescopes. Each telescope employs the PMU based on a continuous rotating half-wave plate (HWP) at the aperture. The PMU is a critical instrument for the LiteBIRD to achieve the science goal because it significantly suppresses 1/f noise and mitigates systematic uncertainties. The LiteBIRD LFT PMU consists of a broadband achromatic HWP and a cryogenic rotation mechanism. In this presentation, we discuss requirements, design and systematic studies of the PMU, and we report the development status of the broadband HWP and the space-compatible cryogenic rotation mechanism.
AB - We present a breadboard model development status of the polarization modulator unit (PMU) for a low-frequency telescope (LFT) of the LiteBIRD space mission. LiteBIRD is a next-generation cosmic microwave background polarization satellite to measure the primordial B-mode with the science goal of σr < 0.001. The baseline design of LiteBIRD consists of reflective low-frequency and refractive medium-And-high-frequency telescopes. Each telescope employs the PMU based on a continuous rotating half-wave plate (HWP) at the aperture. The PMU is a critical instrument for the LiteBIRD to achieve the science goal because it significantly suppresses 1/f noise and mitigates systematic uncertainties. The LiteBIRD LFT PMU consists of a broadband achromatic HWP and a cryogenic rotation mechanism. In this presentation, we discuss requirements, design and systematic studies of the PMU, and we report the development status of the broadband HWP and the space-compatible cryogenic rotation mechanism.
KW - broadband achromatic half-wave plate
KW - cosmic microwave background
KW - cryogenic rotation mechanism
KW - millimeter-wave polarization
KW - polarization modulator
KW - space program
KW - superconducting magnetic bearing
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U2 - 10.1117/12.2560289
DO - 10.1117/12.2560289
M3 - Conference contribution
AN - SCOPUS:85100025736
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X
A2 - Zmuidzinas, Jonas
A2 - Gao, Jian-Rong
PB - SPIE
T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020
Y2 - 14 December 2020 through 22 December 2020
ER -