First Year of Running of the LHCb Calorimeter System

More than one year of data taking for the LHCb detector and its calorimeter system has passed. The detector is briefly described altogether with the beam conditions that took place during this period. The time adjustment and the energy calibration are explained. The LHCb calorimeter is a key ingredient for particle identification. Electron and photon PID are described here. Finally, some first physics results in radiative decays and χc measurements are given.