Introduction to Nuclear and Particle Physics Subatomic Physics Detectors Measure for every particle produced in an interaction. A solenoid provides a magentic field so the momentum of charged particles can be determined from their radius of curvature.
Calorimeters measure the energy of hadrons, photons, and electrons.
Muon detectors identify muons because muons and neutrinos are the only particles which can pass through the the calorimeters, but muons ionize and neutrinos don't. Measuring energy Calorimeters measure energy by absorbing particles. The resolution degrades rapidly if all the particles are not absorbed. The fluctuations in how much energy leaks out can be much bigger than the statistical uncertainty on measuring the energy that does not leak out. Beta decay If particles can decay to a lower energy state, they will.