[pfdietz]

Boiling point of He at 1 bar is 4.222 K, and its critical point is at 5.1953 K. At 10 K helium is a gas.

[short_sells_poo]

Ah thank you! I'm surprised they'd pick an odd temp like 10k then. I had a vague memory of this being close to the He boiling point but couldn't remember how tight the margins were.