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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 theCosmic 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 CMBat L2, and the onboard High Frequency Instrument (HFI) suffered contaminationby glitches caused by the cosmic-ray (CR) hits. We consider the CR hits canalso be a serious source of the systematic uncertainty for LiteBIRD. Thus, wehave started a comprehensive end-to-end simulation study to assess impact ofthe CR hits for the LiteBIRD detectors. Here, we describe procedures to makemaps and power spectra from the simulated time-ordered data, and presentinitial results. Our initial estimate is that $C_l^{BB}$ by CR is $\sim 2\times 10^{-6}~\mu$K$_{\mathrm{CMB}}^{2}$ in a one-year observation with 12detectors assuming that the noise is 1~aW/$\sqrt{\mathrm{Hz}}$ for thedifferential mode of two detectors constituting a polarization pair.

Simulation of the cosmic ray effects for the LiteBIRD satellite observing the CMB B-mode polarization