Key SppS Experiments | |
---|---|
UA1 | Underground Area 1 |
UA2 | Underground Area 2 |
UA4 | Underground Area 4 |
UA5 | Underground Area 5 |
SppS pre-accelerators | |
PS | Proton Synchrotron |
AA | Antiproton Accumulator |
The Antiproton Accumulator (AA) was an infrastructure connected to the Proton–Antiproton Collider (SppS) – a modification of the Super Proton Synchrotron (SPS) – at CERN.[1][2] The AA was built in 1979 and 1980, for the production and accumulation of antiprotons.[3][4] In the SppS the antiprotons were made to collide with protons, achieving collisions at a center of mass energy of app. 540 GeV (later raised to 630 GeV and finally, in a pulsed mode, to 900 GeV). Several experiments recorded data from the collisions, most notably the UA1 and UA2 experiment, where the W and Z bosons were discovered in 1983.
The concept of the project was developed and promoted by C. Rubbia, for which he received the Nobel prize in 1984.[5] He shared the prize with Simon van der Meer, whose invention of the method of stochastic cooling made large scale production of antiprotons possible for the first time.
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