The CMS electromagnetic calorimeter: results on crystal measurements, quality control and data management in the Rome Regional Center

The barrel of the CMS electromagnetic calorimeter is currently under construction and will contain 61200 PbWO₄ crystals. Half of them are being fully characterized for dimensions, optical properties and light yield in the INFN-ENEA Regional Center near Rome. We describe the setup of an automatic quality control system for the crystal measurements and the present results on their qualification, as well as the REDACLE project, which has been developed to control and ease the production process. As it will not be possible to precalibrate the whole calorimeter, the crystal measurements and quality checks performed of the Regional Center will be crucial to provide a basis for fast in-situ calibration with particles. REDACLE is at the same time a fast database and a data managements system, where the database and the workflow structures are decoupled, in order to obtain the best flexibility.