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[en] We report the results of a systematic study of the performance of 10x10 cm2 triple-GEM detectors operated with several gas mixtures. In a previous paper, we pointed out that adding CF4 to the standard Ar/CO2 gas mixture allows to improve the time resolution of the detector from ∼10 ns down to ∼6 ns (r.m.s.). In this paper, we discuss the results obtained with CF4 and iso-C4H10-based gas mixtures, during a beam test at the πM1 beam facility of the Paul Scherrer Institute (PSI). Preliminary results concerning the discharge probability of triple-GEM detector, when exposed to both high intensity pion/proton beam and α-particles from a radioactive source are presented. Gain measurements and aging tests, using a high intensity 5.9 keV X-ray tube, are eventually discussed
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; 
; CODEN NIMAER; v. 494(1-3); p. 156-162
; CODEN NIMAER; v. 494(1-3); p. 156-162