[time-nuts] Yb clock Allan deviation

[Didier Juges]

Frank,

You are welcome to upload the article to my web site's manuals pages:

Http://WWW.KO4BB.com/manuals

Didier KO4BB




Frank Stellmach <frank.stellmach at freenet.de> wrote:
>Hi,
>
>Andrew Ludlow himself was so kind to send me the Sciencexpress article,
>
>just a few minutes ago..
>
>A pity that I can't post it here (2.2MB).
>
>The Allan deviation is nearly linear, following roughly a 
>3.2E-16/sqrt(tau) equation (calculated for a single clock).
>At tau = 1 sec, the instability is about 2e-16 increasing to 3e-16 at 
>3sec, then approaching the given equation.
>1.6e-18 is attained at 25.000sec only.
>
>The interrogation time seems to be 1-5sec, still with many
>interruptions 
>(25% time-outs).
>
>Further realistic improvements (more atoms, mitigation of several 
>parasitic effects) may yield 1e-18 in 100sec in the future.
>
>Frank
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