Current Status of the High Heat Flux Test Facility for the Plasma Facing Components

This electron beam facility was constructed using a 300 kW electron gun, and the maximum target dimension is 70 cm Χ 50 cm in a cylindrical vacuum chamber of about 140 cm in diameter and 250 cm in length. The performance tests were carried out for the calorimetric calibrations with Cu dummy mockup and for the heat load test of tungsten first wall mockups. Also the thermo-hydraulic tests were performed to evaluate the high temperature gas-cooling devices. For the simulation of the heat load test of each mockup, preliminary thermal-hydraulic analyses with ANSYS-CFX were performed. For the development of the plasma facing components, test mockups were fabricated and tested in the high heat flux test facility and non-destructive method. These manufacturing technologies and test performances will be used for the development of a fusion reactor. In order to perform the beam profile test, an assessment of the possibility of electron beam Gaussian power density profile and the results of the absorbed power for that profile before the test starts are need. To assess the possibility of a Gaussian profile, for the qualification test of the Gaussian heat load profile, a calorimeter was manufactured to simulate real heat. For this high heat flux test, the Korean high heat flux test facility using an electron beam system (KoHLT-EB) was constructed to qualify the performance of small-scale mockup. In this facility, a cyclic heat flux test will be performed to measure the surface heat flux, surface temperature profile, and cooling capacity