Author/Authors :
Abbon، نويسنده , , Ph. and Ball، نويسنده , , J. and Bedfer، نويسنده , , Y. and Carasco، نويسنده , , C. and Delagnes، نويسنده , , E. Perdu-Durand، نويسنده , , D. and Faivre، نويسنده , , J.-C. and Fonvieille، نويسنده , , H. and Giganon، نويسنده , , A. and Kunne، نويسنده , , Xavier F. Le Goff، نويسنده , , J.M.Le and Lehar، نويسنده , , F. and Magnon، نويسنده , , A. and Neyret، نويسنده , , D. and Pasquetto، نويسنده , , E. and Pereira، نويسنده , , H. and P، نويسنده ,
Abstract :
Recent results obtained with a gaseous microstrip detector Micromegas developed for the tracking in the high-rate environment of the COMPASS experiment at CERN are presented. A 26×36 cm2 prototype equipped with the low-noise preamplifier SFE16 was tested in a high-energy hadron beam at CERN. With a gas mixture based on neon, the full efficiency of the Micromegas prototype is obtained at a gain of 6400; the spatial resolution is 50 μm and the time jitter 8.5 ns. We have studied the problem of discharges that affect this kind of microstrip detector, and found that, at fixed gain, the probability of discharge is higher for heavier gas mixtures in the detector. In the conditions of the COMPASS experiment, discharges are kept at a low rate.
