Talk-Polywell.org

Of the usual suspects -Sonny White launched "Casimir Effect Energy" startup

https://www.casimirspace.com/

It is a carefully worded announcement on progress in "cold-fusion" field, more or less.
Detection of neutrons from deuterated erbium/titanium bombarded by high-energy photons, both in "classic fusion" and hypothetical "electron-screened" ways.

Well, as I said you can write them and ask if their heat exchangers can be used in the way you want. And yes, it will be probably complex and expensive - but as well be the cheapest part of working fusion reactor! The mach 5 number mentioned, I believe, means that the heat exchangers can cool up to ...

I've read about the problem of withdrawing excess thermal energy from superconducting coils and remembered about another project that already developed similar tech, if I am not mistaken. It's Skylon SSTO project. They were in the need of heat exchangers to rapidly cool incoming hot air from 1000C t...