The CLEO II silicon vertex detector

We describe a vertex detector comprised of three layers of double-sided silicon wafers, installed in the CLEO II detector at the Cornell Electron Storage Ring (CESR). The innermost silicon wafers are located a distance of 2.35 cm from the stored electron and positron beams; the beams carry a total of 300 mA of current. Characterizations of the improvements in detector performance since VERTEX’96, results on beam related occupancy, and evaluations of detector resolutions are presented. The prospects for physics results from a data set corresponding to integrated luminosity 4 fb−1 with the device installed are discussed.