The experiments
described here were performed using a vacuum can constructed of OFHC copper
which was suspended from the bottom of a small dilution refrigerator. A
simplified diagram of the experiment cell is shown in the figure to the
right. The cell contained two quartz
microbalances. Pure cesium metal was evaporated onto the mass sensitive
regions of one of the microbalances at a rate of about 0.01 monolayers/second.
The evaporated cesium film was sufficiently thick so that the substrate
was indistinguishable from bulk cesium [24].