The results of a study on the quantum yield of various photocathodes designed to detect X-ray radiation with an energy above 40 keV are presented. Experiments have been conducted with photocathode samples made of CsI, LaB, CdWO and ZnWO using synchrotron radiation from the wiggler at the VEPP-4M accelerator. These materials have been chosen due to their high atomic numbers Z, which ensures effective interaction with X-rays through the photoelectric effect. The study has been carried out in the energy range 40–100 keV, which corresponds to the conditions of experiments on fast-flowing physical processes requiring high temporal and spatial resolution. The data obtained allow us to determine the most suitable materials for creating effective photocathodes in electron-optical converters for recording fast physical processes.
Vorobiev et al. (Wed,) studied this question.