[time-nuts] Zeeman frequency oddness

paul swed paulswedb at gmail.com
Sun Oct 28 12:03:48 EDT 2012


Not to side track the thread.
But the comment that the high performance tubes were run at a higher oven
temp makes sense for what I have run into on the depleted tubes.
Thanks
Paul
WB8TSL

On Sun, Oct 28, 2012 at 10:32 AM, Magnus Danielson <
magnus at rubidium.dyndns.org> wrote:

> On 10/28/2012 03:06 PM, Tom Van Baak (lab) wrote:
>
>> Chuck,
>>
>> Information about the HP submarine cesium standard (5062c) as well as
>> details about Zeeman splitting are here:
>> http://www.leapsecond.com/**museum/hp5062c/theory.htm<http://www.leapsecond.com/museum/hp5062c/theory.htm>
>>
>
> At the bottom of that page you find:
>
> "The C-Field can be used to make small frequency adjustments of the
> instrument to bring its frequency closer to that of a desired reference
> frequency. The dependence of the frequency on magnetic field is given by f
> = 9192631770 + 8.7026x10-10fz2, where f and fz are in Hertz. The Zeeman
> frequency, fz, is the average difference in frequency between the 3,0 to
> 4,0 transition and the adjacent field-dependent transitions. fz has a
> linear dependence on magnetic field."
>
> The Zeeman frequency depends on the magnetic field you apply, and the one
> different between different tubes is the C-field coil, so that the same
> current will give different C-field strength and hence different Zeeman
> frequencies. Adjust your C-field current and field separation will be
> different.
>
> What Zeeman frequency splitting is useful to put the resonance on
> SI-second for a particular tube depends on other factors.
>
>
> Cheers,
> Magnus
>
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