OVC pressure

Graham, Lachlan (Lachlan.Graham@dbce.csiro.au)
Wed, 07 Feb 96 17:16:00 PST

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Dear Colleagues,
I would be interested to hear how sensitive the cryogen boiloff rate is to
the pressure in the outer vacuum case. Bruker recommends 5x10^-5 mbar for
our magnet. If the pressure is say 5x10^-4 mbar is the boiloff rate much
increased? Also I would think that the outgassing from the internal
surfaces of the magnet would decrease enormously once it is cooled down.
I would be interested in comments.
Sincerely
L. Graham

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