The DELPHI microvertex detector with double sided readout

Abstract

The silicon strip Microvertex detector of the DELPHI experiment has been upgraded from two coordinates (R) to three coordinates (R and z), without increasing the material in the active volume. This has been achieved using AC coupled double sided silicon strip detectors, with a second metal layer routing the signals from z strips to the ends of the detector modules. The detector description and its performance from the 1994 LEP run are reported.