Prediction of the performances of finely segmented Si detector for tracking applications in future super-colliders after severe radiation damage

The effect of hadron irradiation on segmented silicon detectors is known to severely affect their performances and to lead to their failure after a certain dose is accumulated. The dose at which this failure happens is strongly dependent on the geometry and on the required performances of the devices. In the various scenarios predicted for the CERN Large Hadron Collider (LHC) detector trackers, the deterioration of the full depletion voltage (Vfd) has been used as a measure of the capability of the sensors to survive a certain level of irradiation. This concept can be regarded as a simplification, and a discussion of its limits is presented here.