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

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@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 > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >