Performance of a CMS silicon strip detector module with APV25 readout

The Compact Muon Solenoid experiment at the Large Hadron Collider at CERN will include a silicon strip tracker covering a sensitive area of 206 m2 with about 10 million readout channels. Its silicon detectors, made from 6″ wafers, will be read out by APV25 front-end chips, fabricated in the 0.25 μm deep submicron process which is intrinsically radiation tolerant. A first prototype module has been built consisting of two chained silicon sensors of 320 μm thickness and three APV25 chips (version S0). The performance of this module has been evaluated in a pion and proton beam at the Paul Scherrer Institute (Villigen/CH).