“Sounds important,are there private companies that can do this work?”
If they had the accelerator, yes. You’d have to privatize the Brookhaven linear and ring, have a private company run it.
I have used the Texas A&M Superconducting Isosynchronous Cyclotron for similar work on space microprocessors, but you are on the other side of the LET-Bragg Peak curve there.
No profit in it?