Acta Physica Polonica B
Proceedings Supplement

Vol. 1, No. 2, February 2008, page 301

Results of the 2006 Test Beam Campaign for the CMS Electromagnetic Calorimeter

The CMS electromagnetic calorimeter (ECAL) comprises 75 848 Lead Tungstate scintillating crystals. The barrel part of ECAL consists of 36 supermodules of 1 700 crystals each. During summer 2006, nine of them were exposed to an electron beam, allowing us to determine intercalibration coefficients for all crystals and to study the response and the energy resolution. These measurements will be presented, showing that the calorimeter performance is in agreement with the design resolution.

PACS numbers: 29.40.Vj, 29.85.Fj