Hi My guess is that you either need a cryo pump or ion pumps and a very good seal.
Bob On Sep 1, 2010, at 5:15 PM, Robert Darlington <[email protected]> wrote: > You can pickup oil diffusion pumps pretty inexpensively. They're not quite > ion pumps but they get you way down there and they're fast. With proper > traps you don't really have to worry about coating your experimental physics > package with oil. They're cheap to run and easy to maintain. Ion pumps are > about as simple as things get and could probably be made very easily by some > of us "vacuum-nuts" but I never had the need. Turbo pumps probably won't do > the job and they're expensive and unforgiving. Not only did one of mine > crash, it crashed when a sputtering gun melted through. 80,000 RPM spinning > foil blades don't like hitting the gun cooling water very much! > > Good luck! > > -Bob > > On Wed, Sep 1, 2010 at 2:30 PM, Chris Howard <[email protected]> wrote: > >> >> >> Given the quality of vacuum the manual seems to imply, I'm guessing this >>> wont cut it. I'll bet that even low impurity Teflon has a long bakeout >>> period. >>> >>> >> Too bad they don't have some kind of "getter" to allow lower vacuum specs. >> I expect they thought of that. >> >> The thing does sound like a giant hydrogenated vacuum tube. >> >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
