The ALICE Silicon Pixel Detector (spd)

Details The ALICE Silicon Pixel Detector (spd) The ALICE Silicon Pixel Detector (spd)

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apsp.conf..693k&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 8th Conference. Held 6

Physics

Medical Physics

Scientific paper

The ALICE SPD is made up of 1200 front-end pixel ASICs bump-bonded to silicon sensor ladders for a total of 10 million pixel cells. An overview of the ladders, bump bonding, assembly and on-detector electronics system is presented. The basic element is a half-stave, made out of two ladders, each consisting of 5 ASICs. Two ladders, mounted on an aluminum/polyamide multilayer interconnect bus, constitute a half-stave. The complete detector consists of 120 half-staves on two layers. The readout, timing and control of each half-stave are performed by a PILOT multi chip module containing radiation tolerant ASICs with custom-made opto-electronic components. The pixel detector must comply with severe space and material budget constraints. The read-out electronics must not exceed 2 mm thickness and 13.8 mm width. The material budget is expected to be <1% X0 per layer.

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