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PDA-050 Detector Assembly consists of a 0.5 inch, side-on photomultiplier
tube with a high voltage power supply, voltage divider and buffer
amplifier to measure low level light signals. The design takes
advantage of an inherent current gain which occurs in a dynode
chain located between a photocathode and an anode. The gain is
proportional to an applied high voltage. The PDA-050 is also characterized
by low noise and dark current.