First Alignment of the Complete CMS Silicon Tracking Detector

An overview of the CMS tracker alignment is presented. The overall alignment strategy is described with an emphasis on the tracker-based alignment with inputs from optical survey and the laser alignment system. The presented studies with the full CMS Silicon Tracker are based on several millions of reconstructed tracks from cosmic data taken during the commissioning runs with the detector in its final position. Finally a study of the effect of the alignment on tracking subset of cosmic muons, where the informants are expected to be consistent with the collision mode.