CERN Accelerating science

The ATLAS Collaboration is one of the largest scientific collaborations, composed of around 5700 physicists, engineers, technicians, students and administrators.

ATLAS is the largest detector ever constructed for a particle collider: 46 metres long and 25 metres in diameter.

The Inner Detector is the innermost part of ATLAS to see the decay products of the collisions, so it is very compact and highly sensitive.

Calorimeters measure the energy of particles created in high-energy LHC collisions.

The outer layer of the ATLAS experiment is made of muon detectors. They identify and measure the momenta of muons.

ATLAS uses two different types of superconducting magnet systems – solenoid and toroids.