water, energy (definately not *nix related)

[Andy Jack]

On Mon, Sep 27, 2004 at 01:14:49PM -0400, James Knott wrote:
> Then again, if you *REALLY* want to cool something, it's tough to beat 
> liquid helium.  It's non-toxic too.  ;-)

Non-toxic if it isn't displacing all the air in your lungs. :)

Superconducting magnets used in high field (10-20 Tesla) magnetic
resonance spectrometers are in a dewar of liquid helium (~4 kelvin)
which in turn is in a dewar of liquid nitrogen (~70 kelvin).  Just don't
be in the same room when the magnet quenches (heats up and boils off all
the LH and LN2 -> room fills with non-breathable gas -> R.I.P.)

Andy
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