HERA, the world's first electron‐proton storage‐ring collider, successfully stored its first electron beam on 20 August. The 6‐km‐circumference accelerator is nearing completion at the DESY (Deutsches Elektronen‐Synchrotron) laboratory in Hamburg. In this first trial, a circulating beam of some 3 billion 7‐GeV electrons was maintained in the ring for two minutes. When physics experiments begin at HERA in 1990, countercirculating beams of 30‐GeV electrons and 820‐GeV protons will produce e‐p collisions with center‐of‐mass energy of 314 GeV.
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© 1988 American Institute of Physics.
1988
American Institute of Physics
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