Putterman’s discussion was absolutely fascinating. Looking at his equipment it seems he actually has some “desk top” devices that easily produce varying levels of electrons, protons and neutrons and varying electron volt power levels (I can only guess that’s in terms of mass and velocity so you can tell us ~ he didn’t).
The executive summary of Putterman’s work is that there is fusion happening in a provable way but there isn’t very much. Scaling up is a problem, there is no clear path to break even power. But there are commercial possibilities as a small nuclear source. At least that’s what I remember from the talk. I’m working my own problem currently so I didn’t re-read the site to check for updates.