[time-nuts] HP 5061Cs reference question

paul swed paulswedb at gmail.com
Sat Dec 6 14:16:20 EST 2014

All good answers with a good tube and enough current to read on the meter.
But I am working at the very limit of the Cs fumes. There is current, about
.5 to 1 tick mark on the meter of a 5061 using a 5060 tube.
Thats the challenge on a very eol tube.

On Sat, Dec 6, 2014 at 1:56 PM, Magnus Danielson <magnus at rubidium.dyndns.org
> wrote:

> Tom,
> On 12/06/2014 06:04 PM, Tom Van Baak wrote:
>> Paul,
>> There are 7 peaks total, about 40 kHz apart (on my 5061A). If you're
>> talking about just the central peak, there are two smaller peaks on either
>> side, about 1 kHz apart. The exact value depends on internal magnetic
>> field, which is specific to each beam tube design.
>> For some measurements of all the peaks, have a look at:
>> http://leapsecond.com/pages/cspeak/
> These are the 7 Zeeman pedestals, and on top of them you have the Ramsay
> fringes. You can indeed lock onto the wrong Ramsey-fringe, but they too
> have amplitude differences. For a normal tube, they are quite significant,
> but if you look at the Ramsay fringes on the NIST-F1, they are much denser
> and looses amplitude much slower, so you need to pay more details of which
> fringe you use. The density of the Ramsay fringes is due to the observation
> time, which has been one of the driving forces to develop hydrogen masers
> and cesium fountains, but for a simple cesium tube, it's a few dm of
> distance and the average speed of the cesium steam.
>  You can play with the C-field in addition to playing with peaks:
>> http://leapsecond.com/images/cfield.gif  (578 x 4610 pixels)
> Which is a good illustration. It would be good.
>  For more details search the archives for the word Zeeman. For example:
>> https://www.febo.com/pipermail/time-nuts/2005-April/018171.html
>> A nice description from hp how a cesium beam standard works:
>> http://leapsecond.com/museum/hp5062c/theory.htm
> Do check the FTS-4065C manual as I just uploaded. Good complementary
> information.
> Cheers,
> Magnus
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list