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Razin, V.I; Gotovcev, Yu.N; Kurepin, A.B; Reshetin, A.I
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 12/1998, Letnik: 419, Številka: 2-3Journal Article
The ageing of CsI film by exposure to air is discussed. Such exposures may take place during the transfer of a CsI photocathode from the evaporation vessel to the detector. The direct current (DC) was measured using a deuterium lamp for UV irradiation. It has been recorded as a function of the length of exposure to air for the case of small photocathodes. A 1h exposure was found to have no remarkable effect in comparison to 8 or 15min, but the current was decreased by 90% after 24h exposure. A simple technique for CsI evaporation has been developed.
