3D detectors - a new direction for Medipix

The 3D sensor geometry has many advantages over the traditional planar sensor geometry, including improvements in radiation tolerance (Nucl. Instr and Meth. A 509 (2003) 132) and charge collection time. A 3D sensor compatible with the Medipix1 chip is presented. Preliminary electrical measurements have been made on a test sample fabricated with Schottky contacts and simulations using the ISE package are currently underway. In addition, results concerning the effects of proton damage are shown.