Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 176, Issue 5-6, Pages 733-740Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-013-0996-1
Keywords
Cosmic microwave background radiation; B-mode polarization; Inflation; Transition edge sensor bolometer for space application
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan under KAKENHI [21111002, 21111003, 24111715, 24740182]
- Grants-in-Aid for Scientific Research [21111002, 24111715, 24740182] Funding Source: KAKEN
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LiteBIRD is a next-generation satellite mission to measure the polarization of the cosmic microwave background (CMB) radiation. On large angular scales the B-mode polarization of the CMB carries the imprint of primordial gravitational waves, and its precise measurement would provide a powerful probe of the epoch of inflation. The goal of LiteBIRD is to achieve a measurement of the characterizing tensor to scalar ratio to an uncertainty of . In order to achieve this goal we will employ a kilo-pixel superconducting detector array on a cryogenically cooled sub-Kelvin focal plane with an optical system at a temperature of 4 K. We are currently considering two detector array options; transition edge sensor (TES) bolometers and microwave kinetic inductance detectors. In this paper we give an overview of LiteBIRD and describe a TES-based polarimeter designed to achieve the target sensitivity of 2 K arcmin over the frequency range 50-320 GHz.
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