CMS Tracker performance and alignment with cosmic muons

The goal of the CMS Tracker is to provide high efficiency pattern recognition with excellent momentum, angular, and point resolution of charged particle tracks. The CMS Tracker consists of both microstrip and pixel silicon detectors, for a total of more than 16 000 modules. In order to achieve the desired performances, a careful and successful program of commissioning, calibration and alignment is mandatory. An extensive cosmic data taking of CMS in presence of a 3.8 T magnetic field in Autumn 2008 (CRAFT) was carried out. This proved to be a great opportunity to gain experience with the Data Quality Monitoring (DQM) system, calibrate and align at the full detector granularity the Tracker. Results from the CRAFT experience regarding the DQM, calibration and alignment of the CMS Tracker are reported in the following.