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A comment on General Fusion to build demonstration plant in UK. Parent comment

Re:General Fusion to build demonstration plant in UK by willis936 on Thursday June 17, 2021 @04:36PM (#27544281)
Don't worry, even if all energy humans used was from D+T fusion today it would only create 60% of the helium that we use. Also, helium is so light that it leaves the atmosphere so we really don't have access to much anyway.
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Re:General Fusion to build demonstration plant in UK by gentleman11 on Friday June 18, 2021 @12:27PM (#27552028)
What do we use it for? Isn’t it non reactive?
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Re:General Fusion to build demonstration plant in UK by willis936 on Friday June 18, 2021 @12:48PM (#27552297)
It's most valuable use is as a cryogenic. If you want sub 10K there are very few materials to choose from.

The lower the temperature, the higher your critical current is for a given superconductor. The reason HTS are a big deal isn't that you can have a superconductor at liquid nitrogen temperatures, but that you can have a very high field at liquid helium temperatures.

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