Abstract
A new processing technology and the properties of multialkali antimonide photocathodes are described. The technique requires an initial antimony layer to be deposited on a fiber-optic window at a suitable temperature. After that, the layer is activated by multialkali and antimonide. Thus, the multialkali photocathodes named “The Modern Multialkali Photocathode” are obtained. It has been found that a photocathode thus processed gives a sensitivity of 200 to 300μA/lm for white light at a color temperature of 2854K. This paper shows the variation of photosensitivity during processing of a Modern Multialkali Photocathode and the variation of spectral sensitivity at different wavelengths. The author discusses the results, gives a supposition of “photoemission center”, and discusses the role of Cs in multialkali photocathodes.
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