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| Conference Presentation (Invited) | FZJ-2020-02365 |
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2020
Abstract: In recent years, the interest in compact, accelerator-driven neutron sources (CANS) has increased worldwide, especially with regard to the increasing shutdown of existing fission-based neutron sources. The focus of interest is shifting more and more from low-flux university scale CANS to powerful high-flux CANS that have the potential to replace current national neutron sources. One of the key components on the way from compact low flux neutron sources to compact high flux neutron sources is the neutron target. Unique requirements are placed on the target, consisting of low ion energies in the range of 70 MeV at high ion fluxes up to 100 mA, maximal neutron yield and minimal surface area. These requirements lead among other things to extreme thermal power densities and stresses within the target and therefore the heat dissipation of the target can become a bottleneck for the entire facility in terms of power and reliability. Currently, different approaches to cool the target are being investigated in the different CANS projects, e.g. liquid targets or high temperature targets. The JÜLICH HBS project focuses on a solid target with an adjusted micro channel structure. Theoretical considerations and simulations indicate a possible power density above 1000 W/cm² at a total power of 100 kW, experimental proofs are currently being prepared. The fluid dynamics and structural mechanics simulations of of the target were performed with the commercial ANSYS software. The simulations for the target cooling will be presented at the workshop.
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