A large area GEM detector

Serge Duarte Pinto, Matteo Alfonsi, Ian Brockt, Gabriele Croci, Eric David, Rui De Oliveira, Bat El Pinchasik, Leszek Ropelewski, Fabio Sauli, Miranda Van Stenis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations


A prototype triple GEM detector has been constructed with an area of ̃2000 cm2, based on foils of 66 cm x 66 cm. GEMS of such dimensions have not been made before, and innova-tions to the existing technology were made to build this detector. A single-mask technique overcomes the cumbersome practice of alignment of two masks, which limits the achievable lateral size. Refinement of this technique results in foils with performance similar to traditional GEMS, while lowering cost and complexity of production. In a splicing procedure, foils are glued over a narrow seam, thus obtaining a larger foil. This procedure was shown not to affect the performance of the GEMS. The seam can be as narrow as 2 mm, mechanically strong enough to withstand the necessary stretching tension, and sufficiently flat to maintain homogeneous electric fields in the gas volumes above and below the foil. These innovations should make the manufacture of GEM foils of 1 m2 and beyond possible. With the planned high luminosity upgrade of LHC, a considerable demand for such large area MPGDS is expected for replacement of wire-based trackers. Other possible fields of applications are in large area photodetectors, and high granularity calorimeters using particle flow algorithms.

Original languageEnglish
Title of host publication2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Number of pages7
StatePublished - 2008
Externally publishedYes
Event2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008 - Dresden, Germany
Duration: 19 Oct 200825 Oct 2008

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863


Conference2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008


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