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

Volume

52

Issue

6

fYear

2005

Firstpage

2872

Lastpage

2878

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2005.855640

Filename

1589292