Construction and Performance of a Micro-Pattern Stereo Detector with Two Gas Electron Multipliers

Details Construction and Performance of a Micro-Pattern Stereo Detector with Two Gas Electron Multipliers Construction and Performance of a Micro-Pattern Stereo Detector with Two Gas Electron Multipliers

2001-10-04

arxiv.org/abs/hep-ex/0110008v1

Nucl.Instrum.Meth. A485 (2002) 477-489

Physics

High Energy Physics

High Energy Physics - Experiment

21 pages, 17 figures

Scientific paper

10.1016/S0168-9002(01)02109-X

The construction of a micro-pattern gas detector of dimensions 40x10 cm**2 is described. Two gas electron multiplier foils (GEM) provide the internal amplification stages. A two-layer readout structure was used, manufactured in the same technology as the GEM foils. The strips of each layer cross at an effective crossing angle of 6.7 degrees and have a 406 um pitch. The performance of the detector has been evaluated in a muon beam at CERN using a silicon telescope as reference system. The position resolutions of two orthogonal coordinates are measured to be 50 um and 1 mm, respectively. The muon detection efficiency for two-dimensional space points reaches 96%.

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