Method Development for Evaluating Initial Performance of A Low Energy Cyclotron

Abstract The DECY-13 cyclotron, a compact isochronous accelerator developed in Indonesia, is designed to accelerate negative hydrogen ions (H⁻) to produce radioisotopes for nuclear medicine. This study presents the methodology and implementation of a low-energy function assessment for the DECY-13, targeting the achievement of a 10 µA proton beam at 3 MeV. The assessment includes tests on subsystem functionality, magnetic field mapping, dee voltage requirements, RF power delivery, and phase synchronization between particle revolution and the RF dee field. A synchronization testing method was developed to calculate cumulative phase differences critical for stable acceleration. Results confirm successful ion beam extraction, required beam currents, and energy levels at a dee voltage of ~ 40 kV, supported by 17.57 kW RF power. Although a phase lag of 61.5° remains at 3 MeV, synchronization is maintained within acceptable limits. Further work will focus on magnetic field optimization to reduce phase deviation, enabling progression to higher-energy commissioning.