Hi I'd check the case with a magnet, but I'm not real sure that it would not do something permanent.
Bob On Dec 24, 2009, at 9:09 PM, Bruce Griffiths wrote: > Yes, dont start drilling or punching extra holes in the case as some have > done, unless you are sure the case isn't mu metal or similar. > > Optical interrogation of the resonance using lasers would make it much easier > to separate the electronics from the absorption cell, it would also allow the > rubidium lamp to be dispensed with. > However this method can be expensive and it has its own problems to solve. > > Bruce > > Bob Camp wrote: >> Hi >> >> I certainly agree that, say potting the circuit board, would be a lot easier >> than some of the stuff we have been talking about. >> >> My main concern about tearing up the unit is impacting the magnetic >> shielding. I assume that the outer enclosure forms part of the magnetic >> shield (at least that's what the data sheets say ...). >> >> Bob >> >> >> On Dec 24, 2009, at 7:51 PM, Magnus Danielson wrote: >> >> >>> Bob Camp wrote: >>> >>>> Hi >>>> The original intent was to simply take an existing "cheap" rubidium and do >>>> simple things to it. Tearing it into pieces and redesigning parts of it >>>> was not anything I originally contemplated. The tight integration of the >>>> physics package to the electronics would make this a fairly involved >>>> process. >>>> >>> Well, the main point with that was that while passive temperature stability >>> craze have been raving high here, and into more and more expensive and >>> elaborate propositions, relative simple changes (not without its >>> challenges) would change the equation (amount of heat to cool of) quite >>> noticeably. If money was no object, building no-compromise/prisoners >>> temperature stabilization scehemes around used commercial rubidiums should >>> not be the optimum way to go. Building a Rubidum or Cesium fointain would >>> probably be way better use of the money. Quite a different project thought. >>> >>> Maybe we need to get back to doable levels, and also consider what changes >>> Rb frequency, why and what can we do to avoid it. >>> >>> I have been dipping my nose into the literature, to refresh myself on the >>> complex interactions. Lamp intensity in itself is a fashinating topic, >>> while the filtering cells temperature to intensity dependence is another >>> little complex field of its own and that (as I suspected) intensity too >>> pulls the frequency. Oh, and after a quick glaze, I found that the >>> necessary side-peaks needed for servo of C-field exists for Rb-87, so it >>> can be done similar to that of Cesium. >>> >>> Cheers, >>> Magnus >>> >>> _______________________________________________ >>> 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. > _______________________________________________ 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.
