Thermal cycling of water-cooled divertor mock-ups

During normal operation, the high heat flux components of ITER will suffer cyclic heat loads in the order of more than 5 MW/m² . Candidate armor materials are carbon materials, tungsten alloys and beryllium. Most likely copper alloys will be used for the heat sink. In order to study the performance of several joining techniques between these materials, simulation experiments were performed in an electron beam facility. This paper describes the performance of beryllium-copper joints