Assessment of the cosmic-ray impacts for LiteBIRD using Geant4 simulation

Assessment of the cosmic-ray impacts for LiteBIRD using Geant4 simulation
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使用 Geant4 模拟评估 LiteBIRD 的宇宙射线影响

DOI:
10.1117/12.2629759
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发表时间:
2022
期刊:
Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
影响因子:
--
通讯作者:
Tsukatsune Serika
Tsukatsune Serika
中科院分区:
--
文献类型:
--
作者:
Tominaga Mayu;Tsujimoto Masahiro;Ishino Hirokazu;Stever Samantha L.;Tsukatsune Serika

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LiteBIRD是一项星载实验,致力于探测暴胀理论预测的宇宙微波背景(CMB)线性偏振的大尺度B模式各向异性。它计划于 2020 年代末发射到日地系统的第二拉格朗日点,并使用数千个过渡边缘传感器测辐射热计以 15 个频段绘制天空地图。 LiteBIRD 在其整个生命周期中都会暴露在宇宙射线辐射下,这可能会导致科学性能的下降。宇宙射线在焦平面测辐射热计探测器上的能量沉积被认为是系统效应的严重来源。为了对效果进行定量评估,我们提出了 Geant4 模拟的结果,以估计宇宙射线沉积到焦平面中的能量。我们使用基于 CAD 的航天器模型模拟了不同的宇宙射线成分。我们推导出焦平面上粒子的空间和能量分布。
LiteBIRD is a space-borne experiment dedicated to detecting large-scale B-mode anisotropies of the linear polarization of the cosmic microwave background (CMB) predicted by the theory of inflation. It is planned to be launched in the late 2020s to the second Lagrangean point of the Sun-Earth system and map the sky in 15 frequency bands using thousands of transition edge sensor bolometers. LiteBIRD will be exposed to the cosmic-ray radiation throughout its lifetime, which may lead to the degradation of the scientific performance. Energy deposition by cosmic rays upon the focal plane bolometer detectors is considered a serious source of systematic effects. For a quantitative assessment of the effect, we present the result of Geant4 simulations to estimate the energy deposited by cosmic rays into the focal plane. We simulated different cosmic-ray components using CAD-based spacecraft models. We derive the spatial and energy distribution of the particles in the focal plane.
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发表时间: 2014
期刊: Journal of Physics: Conference Series
影响因子: --
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