Sorry, Brian. The basic cycling speed is going to be limited by the basic design parameter of the critical speed, which translates directly into length of the axial phase. Since we won’t be able to appreciably shorten the electrodes in this timeframe, I’d be looking for ~1khz PRF.
Are you sure it’s going to stand up to X-ray bombardment in the anode? If yes, will it be installed below the skin effect depth?
Other than those questions, there are a lot of parts like the pumps, vacuum housing, and caps that can be partially powered this way. I saw an ad in Green Manufacturing (?) magazine last week for an industrial air compressor which, under certain circumstances, could recover 100% of the electrical input as compressed air and heat. I’ll give them more like 80% to 95%. The ingenuity came from using the waste heat to make hot water.
Whodathunk? 😆