Editorial use only. This image may not be used to state or imply endorsement by CERN of any product, activity or service SPS particle accelerator at C

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Editorial use only. This image may not be used to state or imply endorsement by CERN of any product, activity or service SPS particle accelerator at CERN (the European particle physics laboratory) near Geneva, Switzerland. The super-proton-synchrotron (SPS) accelerator, which started operations in 1976, accelerated protons and antiprotons in the opposite direction and then focused them so that they collided. The subatomic particles produced by these collisions were then studied. It has more recently been used to accelerate high energy electrons and positrons for injection into the large electron-positron collider (LEP), and from 2007 will be used to accelerate protons and heavy ions, and inject them into the large hadron collider (LHC). Photographed in 1988.

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