Performance of the ATLAS forward calorimeter

The ATLAS forward calorimeter is a liquid argon calorimeter based on a novel tubular electrode structure. This paper will focus on the performance of the calorimeter for electrons and hadrons, based on the analysis of beam test data taken in the H6 beamline at CERN in 2003. The ATLAS requirements on the forward calorimeter performance will be reviewed, the calorimeter design and construction will be discussed, and the performance for electron and hadrons will be described.