期刊
出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2577818
关键词
Cosmology; polarimeter; cryogenic; HWP
资金
- Japan by ISAS/JAXA for Pre-Phase A2 studies
- acceleration program of JAXA research and development directorate
- World Premier International Research Center Initiative (WPI) of MEXT
- JSPS
- JSPS KAKENHI Grant [JP15H05891, JP17H01115, JP17H01125]
- Italian Space Agency (ASI Grants) [2020-9-HH.0, 2016-24-H.1-2018]
- National Institute for Nuclear Physics (INFN)
- National Institute for Astrophysics (INAF)
- Centre National d'Etudes Spatiale (CNES)
- Centre National de la Recherche Scientifique (CNRS)
- Commissariat a l'Energie Atomique (CEA)
- Canadian Space Agency
- NASA [80NSSC18K0132]
- Research Council of Norway [263011]
- Spanish Agencia Estatal de Investigacion (AEI) [PID2019-110610RB-C21, AYA2017-84185-P]
- Swedish National Space Agency (SNSA/Rymdstyrelsen)
- Swedish Research Council [2019-03959]
- Excellence Cluster ORIGINS - Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy [EXC-2094 -390783311]
- Office of Science of the U.S. Department of Energy
- Swedish Research Council [2019-03959] Funding Source: Swedish Research Council
The LiteBIRD mission, a JAXA strategic L-class mission for all sky CMB surveys in the 2020s, aims to detect primordial gravitational waves with a sensitivity of the tensor-to-scalar ratio delta r < 0.001 using the polarization modulator unit (PMU) to suppress noise contribution and mitigate systematic uncertainties.
The LiteBIRD mission is a JAXA strategic L-class mission for all sky CMB surveys which will be launched in the 2020s. The main target of the mission is the detection of primordial gravitational waves with a sensitivity of the tensor-to-scalar ratio delta r < 0.001. The polarization modulator unit (PMU) represents a critical and powerful component to suppress 1/f noise contribution and mitigate systematic uncertainties induced by detector gain drift, both for the high-frequency telescope (HFT) and for the mid-frequency telescope (MFT). Each PMU is based on a continuously-rotating transmissive half-wave plate (HWP) held by a superconducting magnetic bearing in a 5K environment. In this proceeding we will present the design and expected performance of the LiteBIRD PMUs and testing performed on every PMU subsystem with a room-temperature rotating disk used as a stand-in for the cryogenic HWP rotor.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据