[time-nuts] A better atomic clock design just published

Lux, Jim (337C) james.p.lux at jpl.nasa.gov
Tue Aug 4 20:56:16 UTC 2009



> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Brooks Shera
> Sent: Tuesday, August 04, 2009 1:53 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] A better atomic clock design just published


> If your wristwatch was as accurate as today's atomic clocks, it would
> not
> gain or lose a second in 80 million years. In the United States,
> announcements of time come from Boulder, Colorado, which houses the
> atomic
> fountain clock that defines the second as 9,192,631,770 oscillations
> between
> the hyperfine ground states of the cesium atom.


But some folks DO have atomic wristwatches <grin>.  Of course, that wasn't a fountain clock, either.



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