Abstract
The silicon strip tracker of CMS is by far the biggest detector of its kind ever operated. Its 15 000 detector modules and 9 million readout channels are individually calibrated in order to achieve the optimal data quality for the experiment. Software tools were designed to automate the operations and reduce the need for maintenance as much as possible, taking care to use pre-existing software frameworks, when possible. The calibration software implements a dedicated scheme of event building, on-line distributed analysis, storage management, data analysis and configuration archival. Dedicated user interfaces and web-applications were developed to ease the operations, speed-up the calibration process, monitor its quality, and track the problems. A complete set of monitoring analyses are also performed online during data taking to validate the data acquired. The calibration parameters are measured continuously, and the values are fed back to the calibration database in order to refine the on-line event reconstruction. A review of the software tools and calibration processes is given here and the obtained results are discussed.
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