Helium is used as a liquid in physics research to keep parts of the beamline or the magnets cold. When it leaks out at 4K, it expands 600 times to a gas, and cools the crap out of everything around it, which can be somewhat of a problem. Not to mention it's not cheap refilling the tanks at CERN after a big leak.
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Helium is used as a liquid in physics research to keep parts of the beamline or the magnets cold. When it leaks out at 4K, it expands 600 times to a gas, and cools the crap out of everything around it, which can be somewhat of a problem. Not to mention it's not cheap refilling the tanks at CERN after a big leak.