First results of Micromegas detector with fast integrated electronics

Abstract A wedge-shaped Micromegas detector has been tested with a fast integrated electronics (PREMUX128). Due to the large capacitance of this detector, special care has been taken to protect electronics from possible streamers in the signal collection area; a study of the discharge mechanism is reported here. The signal-to-noise, spatial resolution and efficiency have been evaluated with a 100 GeV/ c muons beam at the CERN X5 experimental area. Then the rate capability of this detector has been studied with a high rate 300 MeV /c pions beam at the Paul Scherrer Institute (PSI).