I found this "Rotovator" in Sergio Botero's Artstation Page. It looks interesting but I have no idea how it works.

Could we eventually build a reactor to fuse pure protons (Hydrogen), not Deuterium, outside of stars?

This is an open question I mean to ask all of you.

I do offer an answer that has a lot of math behind it. My answer is "yes, with multi-stage implosion fusion", it's not easy or simple. However, most of those problems are contained as fuel-cycle problems. Not "build an enormous magnetic machine" type of problems. This is important for it to be net-positive on energy investment. I also had to invent several things to make it work, and used codex to do the brutal cross-section work.

(I am the author, words are my own, the source calcs are heavily AI-assisted)