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$400k seems to be around what the helium recovery and liquidation to support medical imaging costs, but presumably at a far higher power than a $400k .1Kelvin c
by zardo 5y ago
$400k seems to be around what the helium recovery and liquidation to support medical imaging costs, but presumably at a far higher power than a $400k .1Kelvin cryostat.
- krastanov 5y ago4K is "liquid helium" temperature, as used in medical imaging. It is *relatively* cheap. Sub-1K is achieved by an out-of-equilibrium mixture of Helium-4 and Helium-3 (a much rarer, very expensive isotope). This is why sub-1K is much more expensive than 4K cryostats, for a given cooling power.