Design and analysis of an AB-BNCT self-shielding rotating neutron target
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Accelerator-based neutron sources are widely used in fields like physics and medicine due to controllable energy spectrum and relatively low construction costs. So far, accelerator-based neutron sources for Boron Neutron Capture Therapy (BNCT) face challenges such as neutron target damage during high-power operation and great radioactive activation. To solve these problems, a self-shielding rotating neutron target system is proposed. This system’s neutron yield and energy deposition characteristics are analyzed, and the optimal target material thickness is determined through theoretical calculations. The effects of cooling water and copper plate thickness on neutron yield and spectrum are also studied. A three-dimensional model is established for radiation analysis after target activation to verify the self-shielding performance. Moreover, the thermal analysis of the rotating target validates the cooling scheme. The research results indicate that reasonable material selection and thickness configuration enhance neutron yield and extend target lifespan. The self-shielding design reduces radioactive risks, while the proposed cooling system effectively manages energy deposition from proton bombardment, ensuring safe operation of the neutron target at high power.
Abstract
Accelerator-based neutron sources are widely used in fields like physics and medicine due to controllable energy spectrum and relatively low construction costs. So far, accelerator-based neutron sources for Boron Neutron Capture Therapy (BNCT) face challenges such as neutron target damage during high-power operation and great radioactive activation. To solve these problems, a self-shielding rotating neutron target system is proposed. This system’s neutron yield and energy deposition characteristics are analyzed, and the optimal target material thickness is determined through theoretical calculations. The effects of cooling water and copper plate thickness on neutron yield and spectrum are also studied. A three-dimensional model is established for radiation analysis after target activation to verify the self-shielding performance. Moreover, the thermal analysis of the rotating target validates the cooling scheme. The research results indicate that reasonable material selection and thickness configuration enhance neutron yield and extend target lifespan. The self-shielding design reduces radioactive risks, while the proposed cooling system effectively manages energy deposition from proton bombardment, ensuring safe operation of the neutron target at high power.