Detecting Photoelectron Images with Semiconductor Arrays for Multichannel Photon Counting

The number and variety of digicon-type devices has been increasing at a rapid rate in the last year. This paper describes most of those which are new either in type of array used, design of electron optics, photocathodes, faceplates, or unusual applications. New parallel output digicons have been built using large two-dimensional arrays for UV and visible photometry. and spectrophotometry. An intensified charge coupled device with 10,000 channels will be described and test results given. Single photoelectron pulse height distributions for CCDs used in the electron bombardment mode will be shown and the first data on the use of avalanche diodes to detect photoelectrons will be given.