[time-nuts] Yb clock - NPR Story on Atomic Clocks

[Bob Camp]

Hi

Optical clocks keep getting a little bit better each time they try this or that. They still have a way to go before you will have one running 24/7/365 without it costing more than even NIST can afford to spend. 

Bob

On Aug 23, 2013, at 10:51 AM, Frank Stellmach <frank.stellmach at freenet.de> wrote:

> Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously.
> 
> In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume.
> 
> Perhaps NIST can provide the Allan deviation already.
> 
> Frank
> 
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