Abstract
The accuracy of time spread measurements of fast photomultipliers has been investigated, using single photoelectrons. The effect of the finite light pulse width on the measurement accuracy is determined and discussed. Experimental data have been obtained on a special measuring system for light pulse widths ranging from 200 ps to 10 ns, using fast photomultipliers 8850 and C31024 with optimized operating conditions for minimum transit time spread. A modified exponential function expression and curve-fitting parameters are given, which fit closely the experimentally obtained data over a wide dynamic range of light pulse widths.
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