Hi > On Nov 8, 2019, at 11:18 PM, [email protected] wrote: > > The pressure sensitivity for a classic design can easily be eliminated. > > I'm pretty sure that the old Varian R20 cell was mostly immune. > > Either using the R20 design or stiffer convex ends in a modern design > would work. > > Also a sealed optical unit has been used to get rid of the pressure > problem.
OCXO’s have a pressure sensitivity as well. There, the only real answer is a welded enclosure. Anything short of that simply integrates the pressure via low leak rates and makes things even stranger ….. Bob > > Any of these methods would be trivial in a new design. > > The Rb/glass absorption is mostly in the lamp, when using the proper > glasses in the cell and using similar lasers to what the cold standard > uses eliminates that. > > Newer RF architecture would also help, NLDL multiplier, low noise > synthesis, etc. > > My main gripe was that either they were either intentionally reducing the > performance of their masers or using a setup that did not do justice to > them. > > Cheers, > > Corby > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
