[time-nuts] Cheap Rubidium (heatpipe cooling for)

[Bob Camp]

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
> 
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