GEM muon tracking R and D. Progress report, August 1992--July 1993

The suitability of open-profile CSCs for the GEM muon system was evaluated by constructing a small (0.5 m {times} 1.0 m) prototype and testing it with cosmic ray muons. The measured spatial resolution surpassed the GEM requirement of 75 {mu}m. The test results were compared with Monte Carlo simulations; good agreement was found. Studies of the timing properties of the prototype have been started.