Performance and Calibration of the ATLAS Jet Trigger

ATLAS has been successfully collecting 7 TeV pp collision data from the LHC since 2010, at a rate that will ultimately reach 40 MHz for nominal LHC conditions. The ATLAS trigger system, organized in three levels, handles this enormous data flow, providing efficient rejection by reconstructing and selecting high transverse momentum objects and reducing the rate to ~300-400 Hz. The ATLAS jet trigger is prepared to cover a wide variety of physics topics, ranging from QCD studies to SUSY and Higgs searches and high performance of the jet trigger is essential to achieve the physics goals of ATLAS. Here, we will present the challenges of the ATLAS jet trigger and describe its implementation and performance with 7 TeV data. We will also discuss possible improvements to this system.