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
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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