Abstract of CDF/DOC/SEC_VTX/PUBLIC/2368

Abstract:

The upgrade of the Silicon Microvertex Detector for the CDF experiment, SVX II, in the context of the increased luminosity regime of Run II of the Fermilab TeVatron is described. An overview of current literature and experience is presented with recomendations that the prectices of online monitoring of the delivered dose be continued, and the possiblility of cooling the detector to prevent antiannealing of rediation damage be considered. While no fundimental obstacles for operating SVX II in Run II are foreseen, for Run III the inner layers may require yearly replacement after they have undergone type inversion from the accululated dose, unless the device can be designed to withstand the substantial (50-100 V) over voltages required to defeat the accumulation layer that may substantially increase the interstrip capacitance on the p-side, lowering the signal to noise ratio.