AI 中文总结
该研究为意大利空间局CUSP任务开发了康普顿偏振计飞行原型，经实验室测试其可覆盖25-100 keV硬X射线全能量范围，为研究太阳耀斑磁重联与粒子加速提供支撑。
AI 中文摘要
天基CubeSat太阳偏振计（CUSP）任务旨在通过双相康普顿偏振计测量硬X射线波段（25-100 keV）太阳耀斑的线性偏振，该任务以对太阳耀斑偏振的前所未有的灵敏度，助力研究恒星耀斑磁结构中的磁重联与粒子加速过程。CUSP是意大利空间局Alcor计划下正在开发的项目，旨在研发新型CubeSat任务。在2024年12月启动的CUSP B阶段框架内，科研人员已开发出康普顿偏振计的飞行代表原型，并在实验室中利用硬X射线源对其进行了表征。该原型由4×4的塑料闪烁体棒中央矩阵，以及分别耦合至多阳极光电倍增管和雪崩光电二极管阵列的4条8根细长GAGG闪烁体条组成。这些传感器由基于MAROC-3A和SKIROC-2A ASIC以及Xilinx Artix 7 FPGA的定制前端电子设备读出。塑料闪烁体用作散射体，而GAGG条则完全吸收散射光子；塑料-GAGG的符合事件可用于重建康普顿散射方向，其分布可用于推断源的偏振参数。本文报告了利用知名放射性同位素和X射线管测得的偏振计原型性能，使我们能够评估该偏振计原型在25-100 keV全能量范围内的性能。
英文摘要
The space-based CUbesat Solar Polarimeter (CUSP) mission aims to measure the linear polarization of solar flares in the hard X-ray band (25-100 keV) by means of a dual-phase Compton polarimeter. CUSP will allow to study the magnetic reconnection and particle acceleration in the flaring magnetic structures of our star with its unprecedented sensitivity to solar flare polarization. CUSP is a project under development as part of the Alcor Program of the Italian Space Agency aimed at developing new CubeSat missions. In the frame of CUSP's Phase B, which started in December 2024, a flight-representative prototype of the Compton polarimeter has been developed and characterized with hard X-ray sources in the laboratory. This prototype consists of a 4$\times$4 central matrix of plastic scintillator bars surrounded by 4 strips of 8 elongated GAGG scintillators, respectively coupled to a multi-anode photomultiplier tube and arrays of avalanche photodiodes. These sensors are read out by custom front-end electronics based on MAROC-3A and SKIROC-2A ASICs with a Xilinx Artix 7 FPGA. The plastic scintillators act as scatterers, while the GAGG bars fully absorb the scattered photons. Coincident plastic-GAGG events allow for reconstructing the Compton scattering direction, whose distribution allows for inferring the polarization parameters of the source. We report here the measured performance of the polarimeter prototype using well-known radioactive isotopes and X-ray tubes, allowing us to assess the performance of our polarimeter prototype over the full 25-100 keV energy range.
Comments9 pages, 8 figures, SPIE Astronomical Telescopes + Instrumentation 2026 proceeding
