The ATLAS experiment

Introduction

ATLAS will be a particle physics experiment at the Large Hadron Collider (LHC), which is built at CERN and expected to start operation in 2007. LHC will be the largest and highest-energy accelerator in the world, enabling the study of a new energy frontier. ATLAS will be the largest particle physics detector ever built.

In the particle physics department of Lund University, we are a group of physicists, engineers and graduate students involved in the planning and design of the ATLAS experiment. ATLAS has some 1600 collaborators in total, from 33 countries distributed over 6 continents. In addition to Lund, there are three other Swedish groups in ATLAS, from Uppsala, University of Stockholm and KTH (Royal Institute of Technology, Stockholm).

You can learn more about the ATLAS detector on the experiment tour .
A world map with all countries taking part in ATLAS marked.
The ATLAS project is an international collaboration involving the 34 countries shown here. Each of these countries is shown with color on the map.


Layout of the ATLAS experiment. The Inner Detector, measuring charged particle momenta, is shown in red. The electromagnetic calorimeters, measuring energies of electrons and photons, are shown in yellow. The hadron calorimeters, which measure the hadrons' energies, are shown in green. The muon spectrometer is the outermost detector system in ATLAS. The muons are deflected by toroid magnets (grey tubes in the drawing), which create an azimuthal magnetic field, and the muon trajectories are observed by muon chambers, shown in blue.