Influence of the Target Holder Material on the Cooling Processes of Locally Inclined Targets in the Nirta Solid Compact Target Module

Abstract

The results of numerical modeling of thermal processes in locally inclined targets made of pressed molybdenum powder with holders of titanium and copper are presented. The simulation was conducted to determine the suitability of such targets for irradiation with high-intensity proton beams in the “Nirta Solid Compact Model TS06” target module for producing the medical radioisotope Tc-99m. Calculations were carried out using the Fluid Flow (Fluent) engineering package of the ANSYS Workbench software platform on models of targets with axially symmetric corrugations in the irradiation zone. It is shown that the target temperature decreases on locally inclined targets with titanium and copper holders due to corrugation. On targets with copper holders, it is also possible to increase the maximum irradiation current by 1.5 times compared to standard flat targets, comparable with previously obtained results for targets with niobium holders. It has been established that on locally inclined targets with titanium holders, corrugation does not provide a practically significant increase in the maximum irradiation current due to the low thermal conductivity of titanium.