CLEO II Silcon Vertex Detector Octant

SVX Octant

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This is an octant of the inner two layers of the CLEO-II Silicon VerteX Detector (SVX). The length of the object shown is about 50 cm, and the typical width is about 3 cm.

The four silicon detectors are visible in the lower right of the photo. The two Layer 1 detectors are facing up, and the two Layer 2 detectors are below, and are shadowed. Strips run across the narrow width of the silicon on the Layer 1 and 2 sides facing up, and are used to measure `z'; on the sides facing down, strips run across the long length of the silicon, and are used to measure `r-phi'.

The objects at either end of the silicon are electronic hybrid microcircuits. Flexible circuits made of Kapton are attached at the ends of the hybrids; these carry signals to and from the hybrids. Four temporary connectors `pressed' on to the Kapton are shown in the upper left of the photo.

A ground braid, electrically attached to the conductive carbon fiber composite, is directly above the Kapton.

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Harry Nelson,