Three Gas-Electron-Multiplier tracking detectors with an active area of 10 cm x 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 um. The influence of the angle of incidence of particles on efficiency and spatial resolution was studied in detail.
@article{arxiv.0808.3477,
title = {Beam Performance of Tracking Detectors with Industrially Produced GEM Foils},
author = {Frank Simon and James Kelsey and Michael Kohl and Richard Majka and Miro Plesko and Tai Sakuma and Nikolai Smirnov and Harold Spinka and Bernd Surrow and David Underwood},
journal= {arXiv preprint arXiv:0808.3477},
year = {2009}
}
Comments
8 pages, 9 figures, accepted by Nuclear Instruments and Methods in Physics Research A