First storage of antiprotons

18 August 1978

CERN issues a press release announcing the first storage of antiprotons. It reads: 

Antimatter, in the form of antiprotons, has been stored for the first time in history. 

This scientific first occurred at CERN, the European Organisation for Nuclear Research, at the end of July during tests conducted in view of using the SPS European accelerator as a colliding device between protons and antiprotons. 

Several hundred antiprotons of 2.1 GeV/c were produced by protons from the PS accelerator and were kept circulating in a machine called ICE (Intial Cooling Experiment) for a period of 85 hours i.e. about 300, 000 seconds (3 × 105). The previous best experimental measurement of antiproton lifetime, acquired during bubble chamber experiments, was about 10-4 second, i.e. a ten-thousandth of a second. 

Timeline: 
The story of antimatter

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