Beam energy is one of the main parameters of the irradiation accelerator. In this paper, a novel electron collecting device for real-time beam energy monitoring is proposed. The measuring range of the energy measurement equipment was estimated for different structural characteristics using the Monte Carlo method, and the errors induced by the operation during the measurement were investigated. The simulation results show that the greater the thickness of the top plate, the greater the observable energy range, and increasing the sidewall height increases the measured energy range even more. The error caused by the energy divergence of the Gaussian distribution is less than 2.5%. The measurement results can only represent the placement height within ±5 cm. The placement position cannot deviate from the center position ±5 cm. This research provides a reference for the design of beam energy measurement devices.

Electron accelerator,beam energy,Monte Carlo method,measurement instrument