Performance of triple GEM tracking detectors in the COMPASS experiment

B. Ketzer, Q. Weitzel, S. Paul, F. Sauli, L. Ropelewski

Research output: Contribution to journalConference articlepeer-review

101 Scopus citations


COMPASS is a high-luminosity fixed target experiment at CERN's SPS, which has been taking data with a 160 GeV/c muon beam since 2001. The tracking of charged particles in the near-beam area is achieved by a set of twenty novel large-area micropattern gas detectors based on the Gas Electron Multiplier (GEM). Owing to a two-dimensional readout of signals, each of these detectors delivers two track projections. Distributed over a distance of 30 m throughout the spectrometer, the GEM detectors constitute the backbone of the small-area tracking system of COMPASS. The performance of these detectors in the high intensity muon beam with particle rates up to 25 kHz/mm2 is investigated.

Original languageEnglish
Pages (from-to)314-318
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
StatePublished - 11 Dec 2004
EventProceedings of the 10th International Viennna Conference - Vienna, Austria
Duration: 16 Feb 200421 Feb 2004


  • Gas Electron Multiplier
  • High-rate tracking
  • Micropattern gaseous detectors
  • Position-sensitive particle detectors


Dive into the research topics of 'Performance of triple GEM tracking detectors in the COMPASS experiment'. Together they form a unique fingerprint.

Cite this