Speaker
Description
This work presents a modular light-based detector platform for beam monitoring in conventional and FLASH particle radiotherapy. The system addresses limitations of current beam profilers, which often lack versatility across radiation types, dose rates, field sizes, and spatial-resolution needs. The detector is based on scintillating-fiber arrays coupled to photodiode readout electronics, enabling transverse beam-profile reconstruction without high voltage. Prototypes were developed from compact 50 × 50 mm² systems to larger 250 × 250 mm² detectors, with fiber pitches of 0.4 mm for high-resolution applications and 0.8 mm for larger-area coverage. An embedded UV calibration system corrects channel variations and compensates for radiation-induced changes. The platform connects through a single Ethernet cable and includes dedicated acquisition and analysis software. It was tested with therapeutic proton and carbon-ion beams, as well as 200 MeV electrons at PSI, CNAO, and CERN. The results show successful 2D beam-profile measurements in good agreement with reference systems, demonstrating the potential of this scalable detector for beam diagnostics, online monitoring, and QA across conventional and FLASH radiotherapy conditions
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