Rate and pileup studies for photomultiplier tubes/bases and some electronics

The shift in the electron transit time of a reference pulse due to preceding the pulse with a 100 pulse burst at a rate up to 20 MHz was found to be less than a couple of picoseconds for the two types of photomultiplier tubes and bases intended for use in the new muon (g−2) experiment. Timing shifts of the photomultiplier tubes due to bringing two pulses to within 10 ns of each other were found to be purely from a tail effect. The change in pulse area from the photomultiplier tubes from high rate and pileup was found to be less than a few parts per thousand. The performance of some commonly used electronics was also tested under high rate conditions.