Research and Development for the ATLAS Forward Calorimetry at the Phase-II LHC

During the LHC Run-1 data taking period the ATLAS calorimeter system demonstrated an excellent performance of the electron and photon reconstruction as well as the hadronic jets and missing transverse energy measurements. These precision measurements played a major role in the discovery of the Higgs boson. Further study of the Higgs properties and SUSY searches should be performed at Phase-II LHC which will run at 5-7 times higher luminosity aiming to provide statistics of 3000fb-1 by 2037. A total irradiation doses will be more than doubled compared to the original design, taking into account a safety factor of 2 representing our confidence in radiation background simulations. Moreover, the increased instantaneous luminosity will result in a much higher detector occupancy. The ATLAS Forward Calorimeters (FCal) will be affected by these factors. A rich R&D program is ongoing to evaluate the consequences of the LHC modernization and to investigate different scenarios proposed for the Phase-II detector upgrade.