Simulation inputs
Geometry
Side profile of converter. Distances re in cm. There are thin (0.001 inch) titanium plates on the far left and far right of the model, but they but the are too small to be seen.
Front view of convertor. Distances are in cm.
Materials
Green: Stainless steel
Pink: Titanium
Blue: H2O
Yellow: Tungsten
Assumptions
The beam spot size was given a diameter of 0.5 cm based off of a burn mark on a converter that got hot during irradiation.
Electrons are 42 MeV and mono energetic.