Bob Camp wrote:
Hi
My guess is that you either need a cryo pump or ion pumps and a very good seal.
Bob
You know.. a cryo/sorption pump might be the way to go. Easy to use
(just get some LN2) and they can pump down pretty fast. If you only need
one or two pumpdown cycles, that might be the ticket. "theBellJar" had
a whole thing on homemade cryo pumps using stuff like pickle jars..
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