Initial Beam Test Results from a Silicon-Strip Detector with VLSI Readout

Abstract
Silicon detectors with 256 strips, having a pitch of 25 μ m, and connected to two 128 channel NMOS VLSI chips each (Microplex), have been tested in relativistic charged particle beams at CERN and at the Stanford Linear Accelerator Center. The readout chips have an input channel pitch of 47.5 μ m and a single multiplexed output which provides voltages proportional to the integrated charge from each strip. The most probable signal height from minimum ionizing tracks was 15 times the rms noise in any single channel. Two-track traversals with a separation of 100 μ m were cleanly resolved.

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