I don't think it's just a publication issue. As far as I'm aware GE / none of the companies you cited actually did measurements on a variety of designs for plas

I don't think it's just a publication issue. As far as I'm aware GE / none of the companies you cited actually did measurements on a variety of designs for plasma confinement. It was great to see the German Wendelstein 7-X experiment. I personally think that's a much more promising (both in terms of science & economics) approach to fusion energy.