The ATLAS hadronic endcap calorimeter

A description of ATLAS liquid Ar Hadronic Endcap Calorimeter (HEC) will be given followed by a report on its construction. The plans for assembly of the HEC and its insertion into the endcap cryostat will be briefly discussed. In addition, a description of the recent test beam setup where HEC modules were exposed to beams of electrons, muons and pions in the energy range 6 GeV < E < 200 GeV at the CERN SPS, will be presented. The key test beam results will be reported. A brief progress report on the HEC construction and plans for future joint test beam studies will be given in the conclusion. (12 refs).