EURISOL-DS Multi-MW Target: Study of the WTF Liquid Metal Proton-to-Neutron Converter

This technical note summarises the design calculations and experiments performed within Task #2 of the European Isotope Separation On-Line Radioactive Ion Beam Facility Design Study (EURISOL-DS) for the WTF (Windowless Transverse Film) mercury converter.
A preliminary study was carried out in order to determine the heat deposition within the mercury and estimate the flow velocity needed in the film. The geometry used is based on previous analysis simulated using the Monte Carlo code FLUKA.
Many experiments have been performed at IPUL to optimise an inlet nozzle capable to create a stable film. The experimental program followed to design the film former will be detailed in this report.
The results of these calculations are addressing the baseline parameters. Particularly, a 1 GeV proton beam with a sigma ~2 mm Gaussian distribution impacting on a 4x30x40cm long target. The very high power density requires about 5m/s velocity in the region where the heat deposition is maximum.