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John Adams in the Main Auditorium on 25 November 19591959 1986

1959: the PS starts up

The Proton Synchrotron (PS) accelerated protons for the first time on 24 November 1959, becoming for a brief period the world’s highest energy particle accelerator. With a beam energy of 28 GeV, the PS became host to CERN’s particle physics programme, and provides beams for experiments to this day.

However, when CERN built new accelerators in the 1970s, the PS’s principle role became to supply particles to the new machines. Since the PS started up in 1959, the intensity of its proton beam has increased a thousandfold, and the machine has become the world’s most versatile particle juggler.

In the course of its history the PS has juggled with many different kinds of particles, feeding them to more powerful accelerators or directly to experiments.