Beam Performance of Tracking Detectors with Industrially Produced GEM Foils (original) (raw)

Abstract

Three Gas-Electron-Multiplier tracking detectors with an active area of 10 cm × 10 cm and a two-dimensional, laser-etched orthogonal strip readout have been tested extensively in particle beams at the Meson Test Beam Facility at Fermilab. These detectors used GEM foils produced by Tech-Etch, Inc. They showed an efficiency in excess of 95% and spatial resolution better than 70 µm. The influence of the angle of incidence of particles on efficiency and spatial resolution was studied in detail.

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