A Method for On-Orbit Calibration of the VLAST-P Electromagnetic Calorimeter

作者：Jiaxuan Wang, Zhen Wang, Bo Peng, Renjun Wang, Yunlong Zhang, Zhongtao Shen, Yifeng Wei, Dengyi Chen, Xiang Li, Hu Yiming, Jianhua Guo · 发表于：Open MIND · 年份：2025 · DOI：10.48550/arxiv.2511.07944 · 研究领域：Pulsars and Gravitational Waves Research、Astro and Planetary Science、Gamma-ray bursts and supernovae

The Very Large Area Gamma-ray Space Telescope Pathfinder (VLAST-P), as the technology validation satellite for the VLAST mission, is designed to observe high-energy solar bursts on orbit. The CsI electromagnetic calorimeter (ECAL) is one of the key sub-detectors of VLAST-P. To investigate the on-orbit energy calibration method of the ECAL, a Geant4-based simulation of VLAST-P was carried out. The results show an energy resolution better than 10% in the 0.1 to 5 GeV range and a linearity deviation below 2%. A dedicated minimum-ionization-particle (MIP) calibration method was developed to ensure accurate energy reconstruction and to monitor detector stability throughout the in-orbit calibration period.