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 UC Davis. Each detector comprises a 6 /spl times/ 90 sensor array of 64 /spl mu/m /spl times/ 256 /spl mu/m pixels bump-bonded to a radiation hard, sparsified readout ASIC 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 (SLAC).