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[en] We have operated the Gas Electron Multiplier (GEM) coupled to a CsI photocathode for the detection of single UV photons. Gains of up to 10000 were observed with a single GEM in pure hydrocarbons in the range 40-400 Torr. Using a double-GEM structure, we have detected single photoelectrons on a strip electrode. We have studied the single-electron detection efficiency of the GEM, a crucial parameter in its operation in single-photon detection applications, both experimentally and by simulation
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; 
; CODEN NIMAER; v. 433(1-2); p. 476-481
; CODEN NIMAER; v. 433(1-2); p. 476-481