I'm exploring building a very small basement cyclotron. I have a solid professional electrical engineering background; the only major new technology for me would be the ultra-high vacuum, so I think it's at least possible. I've been going through Humphries' Principles of Charged Particle Acceleration and other online sources to get background information. To keep things manageable, I was thinking of a very low energy proton cyclotron, e.g. in the 10-100 keV range, and very low beam intensity (microamps). The low output requirements would allow for sloppy/inefficient beam extraction from the Dees, small magnets, poor beam focusing, and likely many other bad design elements I wouldn't even be aware of, and yet still get some protons out of it roughly going in the same direction. Are there any interesting amateur uses for a basement cyclotron in that range? Any nuclear reactions possible? I'm not asking how to build such a cyclotron, but rather, if I did, what's possible at that level? I'd like to set the design goals for the minimum output energy and intensity possible where it could still produce interesting results with some targets.