[time-nuts] Cheap Rubidium

[Bob Camp]

Hi

Having a bunch of AC current gets me into another issue. I suspect it's going to couple into something somewhere and give me a spur on the system output.

Bob


On Dec 24, 2009, at 11:53 AM, Magnus Danielson wrote:

> Bob Camp wrote:
>> Hi
>> THe problem with cooler chips is that the heat still has to go somewhere. On the "other side" of the device you need to deal with both the original 10 or 20 watts plus the heat from the cooler. To move 10 or 20 watts and get a significant delta T you need a pretty big cooler chip. Since they are low voltage, that gets you right back to lots of current and thus magnetic fields. The idea of putting the cooler a distance from the cell and coupling with moving air is still an option though. 
> 
> If DC fields cannot be canceled, then maybe AC feed should be applied. This would cancel the first degree effect of the pulling effect, but the average frequency of the Rubidium source would still be pulled, as the frequency pulling does not linearly depend on the effective magnetic field.
> 
> The rubidium gas cell in the cavity needs stable temperature not to change the gas-mixtures pulling effect as well as the cavity itself achieving cavity pulling. The traditional gaslamp is a source of heat, but modern pump lasers would remove that heat source.
> 
> Cheers,
> Magnus
> 
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