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

[Magnus Danielson]

Lux, Jim (337C) wrote:
> 
>> -----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.

An atomic fountain wristwatch would be sparkling for all the wrong 
reasons as the Caesium reacts with the air. :)

Wouldn't like to have some Caesium spill onto my arm...

The use of 171Yb+ is not new, work has been ongoing for some time. 
12.642812118466(2) GHz is the frequency I have notted down. Hmm, should 
update that page. The release does not say anything about ions, but then 
again, I am quite sure whoever wrote that isn't deeply into the subject.

Cheers,
Magnus