The large spectrometers

To study high energy elementary particle interactions effectively, particle identification over a wide energy range and extending over a large solid angle is required. The design and operation of the main components of the large spectrometers built primarily for the study of colliding particle beams are described. The different types of magnet geometries, track detectors, calorimeters, and other particle detectors which, together, identify the particles and their charge, momentum and energy are described. The read out and data processing procedures are outlined. (10 refs).