ATLAS Upgrade

Following the commissioning of ATLAS and the LHC, plans to further increase the design luminosity of $1*10^{34}{cm}^{-2}{s}^{-1}$ towards $5*10^{34}{cm}^{-2}{s}^{-1}$ (SuperLHC or sLHC) have been presented. These accelerator upgrades will increase the data rates with which ATLAS has to cope and will also require hardware upgrades of several sub-detectors. This paper gives an overview of the current plans for upgrades of the ATLAS (inner) detector and highlights the status of developments for the individual sub-detectors. As a first modification, the insertion of a new innermost b-layer is foreseen, the emph{insertable b-layer} IBL. In addition, upgrades of the trigger DAQ are planned to better include tracking information in the trigger decisions. At luminosities beyond $3*10^{34}{cm}^{-2}{s}^{-1}$, the occupancy level of parts of the current inner tracker requires a complete replacement. It is planned to use an all-silicon tracker in the future consisting of pixel detectors for the inner layers and silicon strip detectors for the outer layers. The innermost pixel layer has to withstand up to $2*10^{16}{n}_{eq}/ {cm}^{2}$