2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/84318Multiple-GEM detectors are considered to be good candidates for tracking devices in experiments with high hadronic background. We present the results of the triple-GEM detectors beam test in a high intensity pion beam. The detectors had an optimized two-dimensional readout with minimized strip capacitance. Such optimization permitted the starting point of the efficiency plateau down to a gain of 5000. The probability of GEM discharges induced by heavily ionizing particles has been measured as a function of gain: at a gain of 20000 it amounts to 10^(-11) per incident particle. Such a value will ensure safe operation of the detector in the conditions of forward region of the LHC experiments.zip-file, contains main file in LATEX and 9 figures in eps and epsi formatInstrumentation and Detectorstext