Test of APV–DMILL circuits with silicon and MSGC micro-strip detectors for CMS

The APVD is a radiation-hard integrated circuit fabricated in DMILL technology and developed for the front-end electronic to read out the tracking detectors of CMS. This paper reports test results obtained with prototypes connected to silicon and Micro-Strip Gas Chambers (MSGC) detectors in a 200 GeV/c pion beam. A signal-to-noise ratio of 12 and 7, affected by residual excess noise from common mode oscillations, a spatial resolution of 7 and 11 μm and a detection efficiency of 98% and 93% were measured for silicon detectors in peak and deconvolution modes, respectively. With the MSGC detector, we obtained a signal-to-noise ratio of 17 and a detection efficiency of 97%. The response of an MSGC with this electronic has also been studied with perpendicular and inclined particle tracks and good agreement with a simulation of detector and electronic was obtained.