ATLAS is the detection device at LHC. It’s here where the collision between protons happens at high speed.
Actually ATLAS is at this stage:
Collision Energy: 7 TeV (3.5 + 3.5)
Maximum Luminosity = 12 x 1027 cm-2s-1
Total Collisions (a 7 TeV) = 56,000,000
Image with the events in the 7 TeV collision:
image: ATLAS.ch (CERN)
“(…) two W-boson candidates were identified on Tuesday April 6th. ATLAS is the first (and so far, only) LHC experiment to have spotted W candidates, one decaying to an electron and a neutrino, and the other to a muon and a neutrino.” www.atlas.ch (13 Abril 2010)