In 2001, an upgraded silicon detector system was installed in the
CDF II experiment on the Tevatron at Fermilab. The complete system consists
of three silicon microstrip detectors: SVX II with five layers for precision
tracking, Layer 00 with one beampipe-mounted layer for vertexing, and two
Intermediate Silicon Layers located between SVX II and the main CDF II
tracking chamber. Currently all detectors in the system are operating at or
near design levels.