Title :
Studies of etching effects on triple-GEM detectors operated with CF/sub 4/-based gas mixtures
Author :
Alfonsi, M. ; Baccaro, S. ; Bencivenni, G. ; Bonivento, W. ; Cardini, A. ; de Simone, P. ; Murtas, F. ; Pinci, D. ; Lener, M. Poli ; Raspino, D. ; Saitta, B.
Author_Institution :
Lab. Nazionali di Frascati, Ist. Nazionale di Fisica Nucl., Frascati
Abstract :
We present the results of a global irradiation test of full size triple-GEM detectors operated with a CF4-based gas mixture. This study has been performed in the framework of an R&D activity on detectors for the innermost region of the first muon station of the LHCb experiment. The prototypes have been irradiated at the Calliope facility of the ENEA-Casaccia with a high intensity 1.25 MeV gamma from a 60Co source. After the irradiation test the detectors´ performances have been measured with X-rays and with a 3 GeV pion beam at CERN. A SEM analysis on several samples of the detectors has been performed to complete the understanding of the physical processes occurring in the GEM detector during the strong irradiation
Keywords :
X-ray detection; ageing; electron multiplier detectors; etching; gamma-ray effects; position sensitive particle detectors; CERN; CF4-based gas mixture; Calliope facility; LHCb experiment; R&D activity; SEM analysis; X-rays; aging; detectors performance; etching effects; full size triple-GEM detector; gamma ray irradiation; irradiation test; muon station; pion beam; Aging; Argon; Copper; Etching; Mesons; Performance evaluation; Prototypes; Testing; X-ray detection; X-ray detectors; 29.40.Gx; Aging; GEM; discharge PACS:29.40.Cs; tracking;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2005.855640
