The ATLAS pixel detector

The ATLAS pixel detector is the innermost layer of the ATLAS tracking system and will contribute significantly to the ATLAS track and vertex reconstruction. The detector consists of identical sensor–chip-hybrid modules, arranged in three barrels in the centre and three disks on either side for the forward region.The position of the pixel detector near the interaction point requires excellent radiation hardness, mechanical and thermal robustness, good long-term stability, all combined with a low material budget. The detector layout and results from production tests and system test are presented.