[time-nuts] MIT 2 inch cesium fountain, optically pumped

Peter Torry peter.torry at talktalk.net
Thu Nov 20 08:37:40 EST 2014


Hi Bob,

Some time ago Hoptroff  produced a Cs pocket watch using the Symmetricom 
SA45s - now how long for a wrist watch !!

http://www.engadget.com/2013/05/01/hoptroff-no-10/

Peter
(still pendulum controlled)



On 20/11/2014 12:38, Bob Camp wrote:
> Hi
>
> So the wrist watch sized fountain that was promised 15 years ago isn’t gong to be here for Christmas this year?
>
> Bob
>
>> On Nov 20, 2014, at 12:17 AM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:
>>
>> Hi Rick,
>>
>> They did not mention the complexity of the laser system they needed, especially considering that the optical bench of a fountain isn't all that small, and also because they want to de-tune lasers. While they seems to have an idea, they didn't touch on that subject.
>>
>> Nice to see that people think in a different way thought.
>>
>> Looking forward to see the progress on this one.
>>
>> Cheers,
>> Magnus
>>
>> On 11/20/2014 05:24 AM, Richard (Rick) Karlquist wrote:
>>> See:
>>>
>>> http://newsoffice.mit.edu/2014/portable-atomic-clocks-1112
>>>
>>> Any comments?
>>>
>>> Rick Karlquist N6RK
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