Speaker
Description
To enhance the reliability and service life of a metallic beryllium (Be) target used in a cyclotron-based neutron source under high-beam-power conditions, this study presents the design and numerical simulation of a solid Be target with a back-cooling structure. Computational Fluid Dynamics (CFD) simulations were performed to analyze the thermal effects induced by a proton beam with an energy of 30 MeV and a current of 1 mA. The results provide critical technical support for the design and longevity improvement of the target system.The simulations demonstrate that heat exchange through the water-cooling channels in the copper backplate significantly reduces the maximum temperature on the target. Furthermore, the insertion of a vanadium interlayer between the Be target and the copper substrate effectively mitigates the risk of hydrogen embrittlement in beryllium. Under specified cooling conditions with typical water chiller parameters, the maximum temperature of the Be target remains well below its melting point (1287°C), thus ensuring safe operation under high-power proton irradiation.
