That's why I've been suggesting active control with TE devices. You can buy a small TE cooler at Walgreens for about $20. It's big enough for a 6-pack of Coke cans and already comes in an insulated box. Add a simple temperature control in series w/ the DC supply and you should be well on the way.
-John ================= > 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. > > Bob > > > On Dec 24, 2009, at 5:42 PM, Magnus Danielson wrote: > >> Hal Murray wrote: >>>> A heat pipe might work if the fluid had a sufficiently low boiling >>>> point. The rubidium isn't terribly tolerant of high temperatures, and >>>> I'm going to pick up some heat rise as I put it inside some baffles / >>>> shields. You need to find something that fits a fairly narrow window. >>> This is all backwards. >>> The main reason the typical Rubidium box needs a serious heat sink is >>> that there is an active heater inside it heating up the lamp to get it >>> up to operating temperature. That part of the system better be >>> "tolerant" of high (enough) temperature. >> >> ... or a less heat-producing alternative could be used. The >> Rubidium-lamp produces two wavelengths of which one is filtered by a >> Rubidium-filter which leaves the final pumping wavelength. This is what >> a laser diode could supply instead. >> >>> Maybe things would be a lot better/simpler if the heating/cooling we >>> have been discussing were split into two sections. One for the lamp >>> assembly, and a second for the electronics. >> >> Most of the discussion has been on thermal isolation of the entier >> units. Not what needs generates temperature and what requires >> temperature stability etc. >> >>> Anybody know what the thermal coefficient of the lamp is relative to >>> the electronics? >> >> I am not sure I know what you mean by this... >> >> 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.
