Physical packaging and organization of the drift chamber electronics system for the Stanford Large Detector

The logical organization, physical packaging, and operation of the drift chamber electronics for the Stanford Large Detector are described. The system processes signals from approximately 7000 drift wires and is unusual in that most electronic functions are packaged on printed circuit boards within the detector. The circuits reside on signal-processing motherboards, controller boards, signal-transition boards, power-distribution boards, and fiber-optics-to-electrical conversion boards. The interaction and interconnection of these boards with respect to signal and control flow are presented. >