The USNO Rubidium Fountain Project
Work is underway on a new atomic fountain using Rubidium atoms.
Design and modelling pictures of the new system.
Fabrication of some Rb fountain components.
The C-field solenoid being wound and in place.
The locking spectroscopy layout
The assembled tower
Tower assembly for trap and launch testing
How our rubidium fountain works (2.1 MB pdf file)
or a smaller 800 kB pdf file
Since a goal of the fountain devices is to provide a stable reference
rather than to define the second, we are not constrained to use Cesium. The cold-collision shift, which ends up being the largest contributor to frequency fluctuations in Cesium Fountains, is much smaller in Rubidium.