Experimental study of triple-GEM' performance and a multi-channel image

Experimental study of the performance of triple-GEM and a multi-channel image was reported. The measured experimentally best energy resolution of Fe-55 5.9keV X-ray full energy photo electron peak is 20.2%, effective gain >= 10(4). Image was obtained by using 96 channels digital DAQ system which was composed of 96 8mmx8mm pads and 96 electronics channels.