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. Regards Paul.
On Sat, Dec 6, 2014 at 1:56 PM, Magnus Danielson <[email protected] > 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 -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
