Hi, At operating temperature the lamp, filter cell (if used) and the resonance cell only have gaseous Rubidium in them.
Only exception is early designs that have a "stem" on the resonance cell that exits the cavity. There is a small amount of liquid Rubidium in the stem and in the 5065A a thermoelectric cooler is used to set the amount of Rubidium that eventually enters the cell. No orientation problems an any Rubidium standards due to "puddling". However if a 5065A is stored for MANY years or stored at an extended period at high temperatures more Rubidium than desired can "flood" the cell. At operating temp it's still pretty much a gas but too much in the cell makes it opaque to the required light from the lamp. HP describes a routine to deflood the cell if that happens. Cheers, Corby _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
