The LiteBIRD Satellite Mission - Sub-Kelvin Instrument
A. Suzuki, P. A.R. Ade, Y. Akiba, D. Alonso, K. Arnold, J. Aumont, C., Baccigalupi, D. Barron, S. Basak, S. Beckman, J. Borrill, F. Boulanger, M., Bucher, E. Calabrese, Y. Chinone, H-M. Cho, A. Cukierman, D. W. Curtis, T. de, Haan, M. Dobbs, A. Dominjon, T. Dotani, L. Duband

TL;DR
LiteBIRD is a satellite mission aiming to detect primordial gravitational waves via B-mode polarization in the CMB, utilizing advanced sub-Kelvin detectors and a comprehensive sky survey to explore inflationary physics.
Contribution
This paper presents the design and development of the U.S. sub-Kelvin instrument for the LiteBIRD satellite, including detector technology and readout electronics.
Findings
Design of sub-Kelvin detectors for LiteBIRD
Implementation of TES bolometers with multiplexed readout
Ongoing development of the instrument components
Abstract
Inflation is the leading theory of the first instant of the universe. Inflation, which postulates that the universe underwent a period of rapid expansion an instant after its birth, provides convincing explanation for cosmological observations. Recent advancements in detector technology have opened opportunities to explore primordial gravitational waves generated by the inflation through B-mode (divergent-free) polarization pattern embedded in the Cosmic Microwave Background anisotropies. If detected, these signals would provide strong evidence for inflation, point to the correct model for inflation, and open a window to physics at ultra-high energies. LiteBIRD is a satellite mission with a goal of detecting degree-and-larger-angular-scale B-mode polarization. LiteBIRD will observe at the second Lagrange point with a 400 mm diameter telescope and 2,622 detectors. It will survey the…
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