Current fluctuations in the multiphoton photoemissive effect

It is found theoretically that the number of photoelectrons which appear above the surface of a target having a known quantum yield as a result of the multiphoton photoemissive effect depends on both the order of the effect and the fluctuation properties of the radiation field. The mean square fluctuation in the number of photoelectrons can always be written as a sum taking into account the fluctuations of classical particles and wave fields. It is also shown that fluctuations in the photoelectric current, governed unambiguously by the order of the effect and by the statistics of the radiation field, increase rapidly with increasing order of the effect.Translated from Izvestiya VUZ. Fizika, No. 4, pp. 136–140, April, 1970.