Two dimensional tracking with surface barrier silicon detectors

The authors describe the performance of surface barrier silicon detectors with x,y readout electrodes which have been fabricated and tested with minimum ionizing particles. The impact points of the incoming particles are reconstructed with an accuracy of 52 μm and 300 μm, respectively, for the two coordinates, and each detector provides a fully two-dimensional plot of the beam profile. Global efficiency, edge effects, and two-particle resolution in both coordinates are reported. It is concluded that the strong correlation between the charges collected on the two sides is helpful in solving ambiguities in about 80% of the events with two particles