Muon Spectrometer
The muon spectrometer measures pairs of muons, in particular those coming from the decays of J/ψ and Upsilon particles. Tracking chambers to detect the muons and reconstruct their trajectories will be made from a special composite material, which is highly rigid but very thin. A set of resistive plate chambers (RPC) will act as a triggering device.
Read more about this topic: A Large Ion Collider Experiment