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

paul swed paulswedb at gmail.com
Mon Nov 24 14:16:26 UTC 2014


That is a good paper. I can't understand much of it.
There you go thats the measure. :-)
Thanks
Paul
WB8TSL

On Mon, Nov 24, 2014 at 9:05 AM, Mark Kahrs <mark.kahrs at gmail.com> wrote:

> For those who are interested, a relevant dissertation can be found here:
>
> http://dspace.mit.edu/bitstream/handle/1721.1/71453/795174737.pdf
>
> Unfortunately, you can't print it, but you can read it.  A rather complete
> discussion of the construction of the experimental apparatus is included.
>
>
> On Thu, Nov 20, 2014 at 5:57 PM, Bob Camp <kb8tq at n1k.org> wrote:
>
> > HI
> >
> > I saw that when it came out. It’s a CSAC based gizmo and thus a gas cell
> > rather than a beam tube / state selection device.
> >
> > Bob
> >
> > > On Nov 20, 2014, at 8:37 AM, Peter Torry <peter.torry at talktalk.net>
> > wrote:
> > >
> > > 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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