Good video about Helion.
https://www.youtube.com/watch?v=_bDXXWQxK38
Worth noting, they use Deuterium-He3 fusion to avoid the high energy overhead of generating Tritium as in Tokamak concepts. Their process generates the He3 on the fly for immediate consumption in the core, and also produces Tritium which will be stored ad decay over a period of years into more He3.