Test of silicon hybrid pixel detector in 15-GeV electron beam

We have conducted a beam test of a three-station telescope composed of silicon hybrid pixel detectors developed at the University of California, Davis. Each detector comprises a 6 /spl times/ 90 sensor array of 64 /spl times/ 256 /spl mu/m/sup 2/ pixels bump-bonded to a radiation-hard sparsified readout application-specific integrated circuit with unit cell performance suitable for use in hadron collider experiments. We describe the pixel arrays, the telescope and its data-acquisition system, the telescope alignment optimization procedure using tracks, and the performance of the system in a 15-GeV electron beam at the Stanford Linear Accelerator Center.