[time-nuts] 5061A and Zeeman freq question
Predrag Dukic
stijena at tapko.de
Sat Jul 19 15:14:02 UTC 2008
Bill,
I am not a quantum physicist, but my understanding of Zeeman
splitting is a bit different.
With applied homogenous DC magnetic field to the atoms on their path
You get splitting. Without it You have no Ramsey fringes.
There is a formula to calculate mid-fringe offset from defined cesium
resonance knowing splitting frequency.
So You should always be able to tell the right frequency from the
splitting frequency, and that has nothing to do with definition of
the cesium as primary standard.
The correct field strength and correct splitting frequency, by my
opinion have some importance to other parameters; stability, mid
fringe width etc,
while resonance frequency is tied to split frequency by an exact
mathematical equation.
All of this under assumption that the field is homogenous. If not,
than You have some other problems.
Predrag Dukic
At 15:48 19.7.2008, you wrote:
>My understanding is that the precise cesium hyperfine transition energy,
>and hence microwave frequency, is dependent upon the applied C-field,
>and the field setting to select a particular transition is the same for
>all clocks (which is why these are primary standards). The C-field is
>set by applying an LF signal at the correct frequency to cause Zeeman
>splitting, and optimizing the C-field to peak the splitting.
>
>So, shouldn't the Zeeman frequency always be 42.82 Khz, which is what
>I've seen in every reference? But, my 5061A with a high-performance tube
>has a sticker that says 'Zeeman freq 53.53 Khz'. I can indeed get Zeeman
>splitting at that frequency with a C-field setting of 3.45, but is this
>correct? If so, why? (BTW - I don't seem to be able to get any splitting
>at 42.82 Khz)
>
>Confused,
>Bill
>
>--
>Bill Ezell
>----------
>They said 'Windows or better'
>so I used Linux.
>
>
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