Title :
A large-area VUV photosensor with gain from photoelectron acceleration and concentration
Author :
Lopes, J.A.M. ; Conde, C.A.N.
Author_Institution :
Dept. de Fisica, Coimbra Univ., Portugal
fDate :
30 Oct-5 Nov 1994
Abstract :
We report the results of the development of a new photosensor with large area and high gain. The photoelectrons from a 48-mm-diameter CsI photocathode are accelerated to high voltage and electrostatically concentrated, rather than imaged, onto the surface of an 8-mm-diameter semiconductor detector. The amplitude of the photoelectron signals initiated by a constant-intensity high-stability (<1%) pulsed xenon lamp is approximately linear with the accelerating voltage in the 10 to 20-kV region. Signal non uniformity over 70% of the photocathode area is below 6%
Keywords :
photodetectors; ultraviolet detectors; 10 to 20 kV; 48 mm; CsI; CsI photocathode; constant-intensity high-stability pulsed xenon lamp; large-area VUV photosensor; photoelectron acceleration; Acceleration; Anodes; Cathodes; Electrons; Geometry; Lenses; Optical imaging; Solid scintillation detectors; USA Councils; Voltage;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474375
