Performance evaluation of thin active-edge planar sensors for the CLIC vertex detector

Thin planar silicon sensors with a pitch of 55μm, active edge and various guard-ring layouts are investigated,using two-dimensional finite-element T-CAD simulations. The simulation results have been compared toexperimental data, and an overall good agreement is observed. It is demonstrated that the 50μm thick active-edge planar silicon sensors with floating guard-ring or without guard-ring can be operated fully efficiently upto the physical edge of the sensor. The simulation findings are used to identify suitable sensor designs forapplication in the high-precision vertex detector of the future CLIC linear e$^{+}$e$^{-}$ collider.