Layers 5 and 6: Electromagnetic and Hadronic Calorimeters
Calorimeters quantify the total energy of the particles by converting the energy of particles to visible light though polystyrene scintillators. CDF uses two types of calorimeters: electromagnetic calorimeters and hadronic calorimeters. The electromagnetic calorimeter measures the energy of light particles and the hadronic calorimeter measures the energy of hadrons. The central electromagnetic calorimeter uses alternating sheets of lead and scintillator. Each layer of lead is approximately 3/4in wide. The lead is used to stop the particles as they pass through the calorimeter and the scintillator is used to quantify the energy of the particles. The hadronic calorimeter works in much the same way except the hadronic calorimeter uses steel in place of lead. Each calorimeter forms a wedge, which consists of both an electromagnetic calorimeter and a hadronic calorimeter. These wedges are about 8 feet in length and are arranged around the solenoid.
Read more about this topic: Collider Detector At Fermilab
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