AI 中文总结
该研究针对低地轨道CUSP任务，利用Geant4模拟器结合详细质量模型，估算硬X射线立方星偏振仪的在轨背景，以优化探测器几何与屏蔽，提升信噪比性能。
AI 中文摘要
立方星太阳偏振仪（CUSP）项目旨在利用康普顿散射偏振仪测量25-100 keV硬X射线波段太阳耀斑的线性偏振，该项目属于意大利空间局Alcor计划框架，用于开发创新立方星技术与任务。作为CUSP于2024年12月启动、2026年7月2日结束的B阶段研究的一部分，估算在轨背景以优化信噪比是关键目标之一。在低地轨道，该仪器暴露于宇宙与反照X射线背景、带电粒子以及航天器和大气产生的次级辐射中，模拟这些贡献可优化探测器几何结构与屏蔽，以最大化信噪比性能。我们使用基于Geant4的模拟器给出CUSP的初始在轨背景估算，已构建CUSP的详细质量模型，用于模拟背景分量并估算CUSP轨道的背景计数率。
英文摘要
The CUbesat Solar Polarimeter (CUSP) project aims to measure the linear polarization of solar flares in the 25 - 100 keV hard X-ray band using a Compton scattering polarimeter. CUSP is a project in the framework of the Alcor Program of the Italian Space Agency aimed to develop innovative CubeSat technologies and missions. As part of CUSPs Phase B study, initiated in December 2024 and closed on July 2nd, 2026, estimating the in orbit background to optimize the signal-to-background ratio was one of the key objectives. In low-Earth orbit, the instrument is exposed to cosmic and albedo X-ray backgrounds, charged particles, and secondary radiation from the spacecraft and atmosphere. Simulating these contributions enables optimization of detector geometry and shielding to maximize signal-to-noise performance. We present initial in orbit background estimates for CUSP using a Geant4-based simulator. A detailed mass model of the CUSP has been implemented to simulate background components and estimate the background count rate in the CUSP orbit.
Comments8 pages, 4 figures, Submitted to SPIE Astronomical Telescopes + Instrumentation, Comments are welcome!
