Heavy ion physics from the 1st Pb+Pb run with the ATLAS detector

The ATLAS experiment will use large acceptance, high-granularity electromagnetic and hadronic calorimeters, a large acceptance silicon tracker, and large acceptance muon spectrometers to carry out both low-pt and high-pt measurements of Pb+Pb collisions starting in Fall 2010. The ATLAS calorimetry will provide precision measurements of jets over a rapidity interval extending to +/- 5 units. Charged particle measurements with the ATLAS silicon tracker will allow measurement of jet fragment longitudinal and transverse momentum distributions for for pseudo-rapidities in the range +/- 2.5. ATLAS will also carry out measurements of bulk particle production using both the silicon tracking and calorimetry including. These measurements will include dNch/dete, dET/deta, charged particle v2 and dET/dphi. The combination of the jet and bulk measurements can and will be used to study the structure of events containing jets and to statistically evaluate the response of the medium to the passage of high-energy quarks and gluons