The red hot fusor grid reminds me - I must address thermal issues from plasma, xrays and neutrons for polywell fusion without boiling the superconductor’s liquid nitrogen.
I asked for help with thermal modeling on the polywell talk forum. Good feedback.
Here is a rough draft of the superconducting magrid with a vacuum separated heat shield:
The trick is, the shield must have a gap so that you can weld the lid to the chassis. The welded magrid would have a gap in the shield along the midplane of the torus.
This gap would bring the vacuum between the heat shield and the inner superconductor holder. Well actually it would be ~10 mToor of ionized deuterium.
This design does not include liquid water cooling. Although it’s easy to add cooling channels with the Arcam process, the real challenge is connecting fluid channels when you weld the lids onto the chassis.