Micromegas, a microstrip detector for Compass

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• 作者：Abbon ; Ph. ; Ball ; J. ; Bedfer ; Y. ; Carasco ; C. ; Delagnes ; E. ; Durand ; D. ; Faivre ; J.-C. ; Fonvieille ; H. ; et. al.
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2001
• 出版时间：April 1, 2001
• 年：2001
• 卷：461
• 期：1-3
• 页码：29-32
• 全文大小：141 K

文摘

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 26×36cm² 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 50μm and the time jitter 8.5ns. 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.