A Method for On-Orbit Calibration of the VLAST-P Electromagnetic Calorimeter
Jiaxuan Wang (1,2), Zhen Wang (1,2), Borong Peng (1,2), Renjun Wang (1,2), Yunlong Zhang (1,2), Zhongtao Shen (1,2), Yifeng Wei (1,2), Dengyi Chen (3,4), Xiang Li (3,4), Yiming Hu (3,4), and Jianhua Guo (3,4) ((1) SKLPDE, USTC, Hefei, China, (2) Dept. of Modern Physics, USTC
TL;DR
This paper presents a simulation-based method for on-orbit calibration of the VLAST-P gamma-ray telescope's electromagnetic calorimeter, achieving high energy resolution and stability monitoring.
Contribution
It introduces a Geant4 simulation framework and a MIP calibration method for accurate energy calibration of the ECAL in space.
Findings
Energy resolution better than 10% in 0.1-5 GeV range
Linearity deviation below 2%
Effective in-orbit calibration and stability monitoring
Abstract
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.
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Astro and Planetary Science · Gamma-ray bursts and supernovae