Used ta B.
Before the NSF and its running off the rails into the Social "Sciences" weeds, the DoD used to support all sorts of University Departments with contracts (Basic research and Applied) (and Labs full of equipment with brass DoD inventory tags...).
More than one university campus has a working cyclotron bult by the Army.
They were built in the late 50s to early 60s.
Doubt anhy being built today.