So I find that somewhat surprising (Aluminum as a material for UHV systems) because they outgas water -for months. Anodized aluminum is especially bad! Did they make any suggestions on cleaning the oxide off before pumping down and baking?
-Bob (machinist and vacuum nut) On Tue, Sep 27, 2011 at 12:56 PM, Poul-Henning Kamp <[email protected]>wrote: > > I just finished my Colloquium on leap-seconds at the USNO, and afterwards > had lunch with Demitriou Matsakis and one of his Fountain building > physicists. > > Remembering a previous discussion on the topic here, I asked if building > a fountain would be a feasible amateur project. > > The answer is "yes, if you have enough money". > > The shared wisdom was that you want to build your vacuum vessel out > of aluminium, which in addition to being a-magnetic also makes it > possible to bolt the windows in, rather than mounting them by > welding and that rubidium is a better target atom than cesium. > > Gentlemen, start your lathes... > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > > _______________________________________________ > 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.
