The LiteBIRD satellite is planned to be launched by JAXA in the late 2020s. Its main purpose is to observe the large-scale B-mode polarization in the Cosmic Microwave Background (CMB) anticipated from the Inflation theory. LiteBIRD will observe the sky for three years at the second Lagrangian point (L2) of the Sun-Earth system. Planck was the predecessor for observing the CMB at L2, and the onboard High Frequency Instrument (HFI) suffered contamination by glitches caused by the cosmic-ray (CR) hits. We consider the CR hits can also be a serious source of the systematic uncertainty for LiteBIRD. Thus, we have started a comprehensive end-to-end simulation study to assess impact of the CR hits for the LiteBIRD detectors. Here, we describe procedures to make maps and power spectra from the simulated time-ordered data, and present initial results. Our initial estimate is that ClBB by CR is ∼2×10−6μKCMB2 in a one-year observation with 12 detectors assuming that the noise is 1~aW/Hz for the differential mode of two detectors constituting a polarization pair.
@article{arxiv.2101.08410,
title = {Simulation of the cosmic ray effects for the LiteBIRD satellite observing the CMB B-mode polarization},
author = {Mayu Tominaga and Masahiro Tsujimoto and Samantha Lynn Stever and Tommaso Ghigna and Hirokazu Ishino and Ken Ebisawa},
journal= {arXiv preprint arXiv:2101.08410},
year = {2021}
}