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- Title
Mission Design of LiteBIRD.
- Authors
Matsumura, T.; Akiba, Y.; Borrill, J.; Chinone, Y.; Dobbs, M.; Fuke, H.; Ghribi, A.; Hasegawa, M.; Hattori, K.; Hattori, M.; Hazumi, M.; Holzapfel, W.; Inoue, Y.; Ishidoshiro, K.; Ishino, H.; Ishitsuka, H.; Karatsu, K.; Katayama, N.; Kawano, I.; Kibayashi, A.
- Abstract
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 $$r$$ to an uncertainty of $$\delta r=0.001$$ . 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 $$\upmu $$ K arcmin over the frequency range 50-320 GHz.
- Subjects
COSMIC background radiation; GRAVITATIONAL waves; CRYOGENICS; BOLOMETERS; POLARISCOPE
- Publication
Journal of Low Temperature Physics, 2014, Vol 176, Issue 5/6, p733
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-013-0996-1