2002/12/01 by G. Bencivenni, W. Bonivento, A. Cardini +8
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance #Radiation Detection and Scintillator Technologies
paper · doi:10.1109/tns.2002.806219
crossref issued 2002/12/01 · crossref published 2002/12/01 · crossref published-print 2002/12/01 · openalex publication_date 2002/12/01 · crossref created 2003/03/07 · crossref deposited 2025/03/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/21 · crossref indexed 2026/07/28
In this paper, results of a time performance study of gas electron multiplier (GEM)-based detectors are discussed. This study was driven by an R&D activity on detectors for the Level 0 LHCb muon trigger. Results presented in this paper are of more general interest, i.e., for experiments in which high-rate charged-particle triggering is needed. Little interest was given so far to time performance of GEM-based detectors, with the exception of one paper reporting the measurement of a double-GEM detector time resolution with an Ar/CO/sub 2/ (70/30) gas mixture where the authors quoted a time resolution such that high-efficiency muon triggering at LHCb would be impossible. The results reported here, obtained with the addition of CF/sub 4/ and isobutane to the Ar/CO/sub 2/ standard mixture, considerably improve the time performance discussed in the above-mentioned paper, allowing one to reach a time distribution root mean square of 5 ns with an isobutane-based mixture. In these conditions, a spark probability per incoming hadron has been preliminary measured to be in the range 5/spl middot/10/sup -12//spl divide/10/sup -11/ at 95% confidence level. These facts make the triple-GEM detector a promising option for high-rate charged-particle triggering.