The Electromagnetic Calorimeter of the HERA-B Experiment

At the end of the HERA-B data taking, an overview of the experiment's Electromagnetic Calorimeter (ECAL) is given and its performances are shown to be close to design specifications. The detector's readout (RO) and pretrigger (EPT) systems are also described and some significative acquired physical signals are shown in order to discuss the system's ability to perform the foreseen physics program. Emphasis is put on some innovative particle identification techniques applied both at trigger and reconstruction level, such as the electron Bremsstrahlung recovery, and to the calibration procedure. The success of the EPT project is underlined as its philosophy was applied to the LHCb detector which is at present under construction