Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope

Thuong D. Hoang; Tomotake Matsumura; Ryota Takaku; Takashi Hasebe; Tommaso Ghigna; Nobuhiko Katayama; Yuki Sakurai; Kunimoto Komatsu; Teruhito Iida; Yurika Hoshino; Shinya Sugiyama; Hirokazu Ishino

doi:10.1117/12.2630653

Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope

Thuong D. Hoang, Tomotake Matsumura, Ryota Takaku, Takashi Hasebe, Tommaso Ghigna, Nobuhiko Katayama, Yuki Sakurai, Kunimoto Komatsu, Teruhito Iida, Yurika Hoshino, Shinya Sugiyama, Hirokazu Ishino

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

LiteBIRD is the Cosmic Microwave Background (CMB) radiation polarization satellite mission led by ISAS/JAXA. The main scientific goal is to search for primordial gravitational wave signals generated from the inflation epoch of the Universe. LiteBIRD telescopes employ polarization modulation units (PMU) using continuously rotating half-wave plates (HWP). The PMU is a crucial component to reach unprecedented sensitivity by mitigating systematic effects, including 1/f noise. We have developed a 1/10 scale prototype PMU of the LiteBIRD LFT, which has a 5-layer achromatic HWP and a diameter of 50 mm, spanning the observational frequency range of 34-161 GHz. The HWP is mounted on a superconducting magnetic bearing (SMB) as a rotor and levitated by a high-Temperature superconductor as a stator. In this study, the entire PMU system is cooled down to 10 K in the cryostat chamber by a 4-K Gifford-McMahon (GM) cooler. We propagate an incident coherent millimeter-wave polarized signal throughout the rotating HWP and detect the modulated signal. We study the modulated optical signal and any rotational synchronous signals from the rotation mechanism. We describe the testbed system and the preliminary data acquired from this setup. This testbed is built to integrate the broadband HWP PMU and evaluate the potential systematic effects in the optical data. This way, we can plan with a full-scale model, which takes a long time for preparation and testing.

Original language	English
Title of host publication	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI
Editors	Jonas Zmuidzinas, Jian-Rong Gao
Publisher	SPIE
ISBN (Electronic)	9781510653610
DOIs	https://doi.org/10.1117/12.2630653
Publication status	Published - 2022
Event	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022 - Montreal, Canada Duration: Jul 17 2022 → Jul 22 2022

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12190
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022
Country/Territory	Canada
City	Montreal
Period	7/17/22 → 7/22/22

Keywords

CMB polarization
Half-wave plate
Polarization modulation unit

ASJC Scopus subject areas

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

Access to Document

10.1117/12.2630653

Cite this

Hoang, T. D., Matsumura, T., Takaku, R., Hasebe, T., Ghigna, T., Katayama, N., Sakurai, Y., Komatsu, K., Iida, T., Hoshino, Y., Sugiyama, S., & Ishino, H. (2022). Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope. In J. Zmuidzinas, & J-R. Gao (Eds.), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI Article 121902O (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12190). SPIE. https://doi.org/10.1117/12.2630653

Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope. / Hoang, Thuong D.; Matsumura, Tomotake; Takaku, Ryota et al.
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI. ed. / Jonas Zmuidzinas; Jian-Rong Gao. SPIE, 2022. 121902O (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12190).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hoang, TD, Matsumura, T, Takaku, R, Hasebe, T, Ghigna, T, Katayama, N, Sakurai, Y, Komatsu, K, Iida, T, Hoshino, Y, Sugiyama, S & Ishino, H 2022, Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope. in J Zmuidzinas & J-R Gao (eds), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI., 121902O, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12190, SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022, Montreal, Canada, 7/17/22. https://doi.org/10.1117/12.2630653

Hoang TD, Matsumura T, Takaku R, Hasebe T, Ghigna T, Katayama N et al. Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope. In Zmuidzinas J, Gao J-R, editors, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI. SPIE. 2022. 121902O. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2630653

Hoang, Thuong D. ; Matsumura, Tomotake ; Takaku, Ryota et al. / Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI. editor / Jonas Zmuidzinas ; Jian-Rong Gao. SPIE, 2022. (Proceedings of SPIE - The International Society for Optical Engineering).

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title = "Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope",

abstract = "LiteBIRD is the Cosmic Microwave Background (CMB) radiation polarization satellite mission led by ISAS/JAXA. The main scientific goal is to search for primordial gravitational wave signals generated from the inflation epoch of the Universe. LiteBIRD telescopes employ polarization modulation units (PMU) using continuously rotating half-wave plates (HWP). The PMU is a crucial component to reach unprecedented sensitivity by mitigating systematic effects, including 1/f noise. We have developed a 1/10 scale prototype PMU of the LiteBIRD LFT, which has a 5-layer achromatic HWP and a diameter of 50 mm, spanning the observational frequency range of 34-161 GHz. The HWP is mounted on a superconducting magnetic bearing (SMB) as a rotor and levitated by a high-Temperature superconductor as a stator. In this study, the entire PMU system is cooled down to 10 K in the cryostat chamber by a 4-K Gifford-McMahon (GM) cooler. We propagate an incident coherent millimeter-wave polarized signal throughout the rotating HWP and detect the modulated signal. We study the modulated optical signal and any rotational synchronous signals from the rotation mechanism. We describe the testbed system and the preliminary data acquired from this setup. This testbed is built to integrate the broadband HWP PMU and evaluate the potential systematic effects in the optical data. This way, we can plan with a full-scale model, which takes a long time for preparation and testing.",

keywords = "CMB polarization, Half-wave plate, Polarization modulation unit",

author = "Hoang, {Thuong D.} and Tomotake Matsumura and Ryota Takaku and Takashi Hasebe and Tommaso Ghigna and Nobuhiko Katayama and Yuki Sakurai and Kunimoto Komatsu and Teruhito Iida and Yurika Hoshino and Shinya Sugiyama and Hirokazu Ishino",

note = "Funding Information: We would like to thank Fabio Columbro and Peter Hargrave for fruitful comments. We thank the World Premier International Research Center Initiative (WPI), MEXT, Japan for support through Kavli IPMU. This work was also supported by JSPS KAKENHI Grant Numbers 18KK0083, and JSPS Core-to-Core Program number JPJSCCA20200003, A. Advanced Research Networks. LiteBIRD (phase A) activities are supported by the following funding sources: ISAS/JAXA, MEXT, JSPS, KEK (Japan); CSA (Canada); CNES, CNRS, CEA (France); DFG (Germany); ASI, INFN, INAF (Italy); RCN (Norway); AEI (Spain); SNSA, SRC (Sweden); NASA, DOE (USA). Publisher Copyright: {\textcopyright} 2022 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022 ; Conference date: 17-07-2022 Through 22-07-2022",

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doi = "10.1117/12.2630653",

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editor = "Jonas Zmuidzinas and Jian-Rong Gao",

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AU - Hoang, Thuong D.

AU - Matsumura, Tomotake

AU - Takaku, Ryota

AU - Hasebe, Takashi

AU - Ghigna, Tommaso

AU - Katayama, Nobuhiko

AU - Sakurai, Yuki

AU - Komatsu, Kunimoto

AU - Iida, Teruhito

AU - Hoshino, Yurika

AU - Sugiyama, Shinya

AU - Ishino, Hirokazu

N1 - Funding Information: We would like to thank Fabio Columbro and Peter Hargrave for fruitful comments. We thank the World Premier International Research Center Initiative (WPI), MEXT, Japan for support through Kavli IPMU. This work was also supported by JSPS KAKENHI Grant Numbers 18KK0083, and JSPS Core-to-Core Program number JPJSCCA20200003, A. Advanced Research Networks. LiteBIRD (phase A) activities are supported by the following funding sources: ISAS/JAXA, MEXT, JSPS, KEK (Japan); CSA (Canada); CNES, CNRS, CEA (France); DFG (Germany); ASI, INFN, INAF (Italy); RCN (Norway); AEI (Spain); SNSA, SRC (Sweden); NASA, DOE (USA). Publisher Copyright: © 2022 SPIE.

PY - 2022

Y1 - 2022

N2 - LiteBIRD is the Cosmic Microwave Background (CMB) radiation polarization satellite mission led by ISAS/JAXA. The main scientific goal is to search for primordial gravitational wave signals generated from the inflation epoch of the Universe. LiteBIRD telescopes employ polarization modulation units (PMU) using continuously rotating half-wave plates (HWP). The PMU is a crucial component to reach unprecedented sensitivity by mitigating systematic effects, including 1/f noise. We have developed a 1/10 scale prototype PMU of the LiteBIRD LFT, which has a 5-layer achromatic HWP and a diameter of 50 mm, spanning the observational frequency range of 34-161 GHz. The HWP is mounted on a superconducting magnetic bearing (SMB) as a rotor and levitated by a high-Temperature superconductor as a stator. In this study, the entire PMU system is cooled down to 10 K in the cryostat chamber by a 4-K Gifford-McMahon (GM) cooler. We propagate an incident coherent millimeter-wave polarized signal throughout the rotating HWP and detect the modulated signal. We study the modulated optical signal and any rotational synchronous signals from the rotation mechanism. We describe the testbed system and the preliminary data acquired from this setup. This testbed is built to integrate the broadband HWP PMU and evaluate the potential systematic effects in the optical data. This way, we can plan with a full-scale model, which takes a long time for preparation and testing.

AB - LiteBIRD is the Cosmic Microwave Background (CMB) radiation polarization satellite mission led by ISAS/JAXA. The main scientific goal is to search for primordial gravitational wave signals generated from the inflation epoch of the Universe. LiteBIRD telescopes employ polarization modulation units (PMU) using continuously rotating half-wave plates (HWP). The PMU is a crucial component to reach unprecedented sensitivity by mitigating systematic effects, including 1/f noise. We have developed a 1/10 scale prototype PMU of the LiteBIRD LFT, which has a 5-layer achromatic HWP and a diameter of 50 mm, spanning the observational frequency range of 34-161 GHz. The HWP is mounted on a superconducting magnetic bearing (SMB) as a rotor and levitated by a high-Temperature superconductor as a stator. In this study, the entire PMU system is cooled down to 10 K in the cryostat chamber by a 4-K Gifford-McMahon (GM) cooler. We propagate an incident coherent millimeter-wave polarized signal throughout the rotating HWP and detect the modulated signal. We study the modulated optical signal and any rotational synchronous signals from the rotation mechanism. We describe the testbed system and the preliminary data acquired from this setup. This testbed is built to integrate the broadband HWP PMU and evaluate the potential systematic effects in the optical data. This way, we can plan with a full-scale model, which takes a long time for preparation and testing.

KW - CMB polarization

KW - Half-wave plate

KW - Polarization modulation unit

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DO - 10.1117/12.2630653

M3 - Conference contribution

AN - SCOPUS:85140724987

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI

A2 - Zmuidzinas, Jonas

A2 - Gao, Jian-Rong

PB - SPIE

T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022

Y2 - 17 July 2022 through 22 July 2022

ER -

Testbed preparation of a small prototype polarization modulator for LiteBIRD Low-Frequency Telescope

Abstract

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Conference

Keywords

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