Production of particle jets by negative pions, 1990s.
© CERN / Science & Society
Production of particle jets by 16 GeV negative pions (p-mesons) in the first CERN liquid hydrogen bubble chamber. It was only 30 cm in diameter. Detectors are used to measure properties of particles. Some measure the tracks left behind by particles and others measure energy. Founded in 1954, CERN is the world's leading particle physics research laboratory, and one of Europe's first joint ventures.