A QE improvement greater than was observed at approximately power density for all of the samples relative to the uncoated Nb sample.
QE of CsBr/Nb obtained at high power density for different thicknesses.
Expanded plot of Fig. 2 showing the activation times of a few minutes at high power density.
Improvement in QE observed at low power density on a 5 nm thick CsBr/Nb sample from the second batch. A 1 mm diameter 257 nm laser beam was utilized. The QE of the uncoated sample was .
More than eight hundred-fold improvement in QE observed in a 5 nm thick CsBr/Nb sample from the second batch at high power density .
QE vs time on an area of the 5 nm CsBr/Nb sample from the second batch indicating the relative short intervals with a QE approaching 0.1% ( improvement relative to the uncoated sample).
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