The ATLAS group of the LPSC was formed in November 1991.Naturally, its activities evolved a lot since then (see "Former activities" section).

The historical activity in the liquid argon calorimeter continues with our implication in the data quality.

The physics activities are currently in three main areas : top quark physics, search for extra dimensions (G*→γγ, gKK →ttbar) et search for supersymetry/dark matter (monophoton channel).

The group is also very committed to the software of the experiment. The physicists contribute in the jets software and in the validation of the simulation and reconstruction programmes. The computing engineers maintain and develop two essential tools: the "TagCollector", which manages the various software packages and releases and "AMI" which manages the meta-data.

The group participates also to the LHC data processing and storage thanks to the use of the LPSC grid site. This site allows Monte Carlo data production and detector data processing for the ATLAS and ALICE experiments as well as storage and analysis of these data. Moreover the group is also involved in the follow-up and support of the ATLAS grid sites.

Finally, the group is also active in LHC and particle physics outreach.