Carving out an odd shape with the X-Carve

I was going to make a headphone stand for my desk because it is so messy. I have to design all made in Autodesk Fusion 360, but I can’t figure out what type of tool path to use to clear it out. The shape I am trying to get it to carve out is Half of a cylinder. Any tips on how to get it to work?

a ball nose will do the trick for the finishing pass, but maybe you can rotate the part 90 degrees and mill it out with a single 2D operation. depends on you Z travel

Thanks so much!!!