Design and Error Analysis of Energy Monitoring Devices Using FLUKA

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 measurable range of the energy measurement equipment was estimated for different structural characteristics using FLUKA. The errors induced by the operation of the monitoring device and the parameters of the measured accelerator during the measurement were also investigated. The simulation results show that the thicker the upper plate, the larger 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 and error analysis of beam energy measurement devices.