Status report of the intermediate silicon layers detector at CDFII

The Intermediate Silicon Lavers detector (ISL) is a large radius silicon tracker, installed in the CDF detector for the RUN II of the Tevatron Collider. With almost 4 m(2) of double-sided silicon sensors and 300,000 electronic channels it represents the biggest system of this kind ever built. The construction and installation phases, the performed quality assurance tests as well as the problems encountered are reviewed. RUN II of the Tevatron officially started on March 1st, 2001. Although the CDF silicon system is still being commissioned. results on the performance of the ISL detector obtained using the first data are presented. (C) 2002 Elsevier Science B.V. All rights reserved. RI Chiarelli, Giorgio/E-8953-2012