The ATLAS experiment

Introduction

ATLAS is a particle physics experiment at the Large Hadron Collider at CERN. The ATLAS detector is searching for new discoveries in the head-on collisions of protons of extraordinarily high energy. ATLAS will learn about the basic forces that have shaped our Universe since the beginning of time and that will determine its fate. Among the possible unknowns are the origin of mass, extra dimensions of space, unification of fundamental forces, and evidence for dark matter candidates in the Universe.

In the particle physics department of Lund University, we are a group of physicists, engineers and graduate students involved in Grid activities, detector performance and data analysis from the ATLAS experiment. ATLAS has approximately 3000 collaborators. 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 38 countries. 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.