Time-of-arrival photoelectron correlator

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Abstract
A photoelectron correlator based on the measurement of the joint probability distribution function in the arrival times of eight stop pulses following a single start pulse is described. This correlator has a measurement interval of 5 μs and delay time resolution of 2.5 ns. With an eight-stop capability, much higher count rates can be used without fear of distorting the intensity–intensity time correlation function due to saturation. Thus the accumulation time becomes tolerable for acceptable signal-to-noise ratios in time correlation function measurements with such a short delay time increment.