Poul-Henning Kamp wrote:
In message<caf_se-dk+1h1t2xks1u19ty7nsmxrtqd+zv_2wbs0njm1ey...@mail.gmail.com>
, Robert Darlington writes:
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?
No mention was made thereof.
With good getters I'm not sure the water would be a problem.
UHV operation isnt required, even the PTB fountain only has a background
pressure of 5E-7Pa.
http://www.congrex.nl/EFTF_Proceedings/Papers/Session_2_Cold_Atom_Clocks/02_02_Gerginov.pdf
operation with somewhat higher background pressures (with increased
pressure shift uncertainty) should be possible.
Bruce.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
