UA5 experiment

The experiment was approved in February 1979, as a collaboration between CERN and the universities of Bonn, Brussels, Cambridge and Stockholm.

[2] The object of the experiment was to investigate Centauro events[1] and more generally to perform a first rapid visual survey of the energy region afforded by the then new SPS collider.

[3] Measurements were done on proton-antiproton collisions of 540 GeV center-of-mass energy, with the results being published in November 1983.

[5] The experimental setup consisted of two large streamer chambers which were placed above and below the SppS beam pipe.

The chambers were triggered by requiring hits in scintillation counters at each end.

The streamer chamber of UA5, which had been operating at the Intersecting Storage Rings until Easter, was installed in its platform, alongside the UA2 detector and in September 1981 was moved into the beam
First proton-antiproton collider interactions as seen by the streamer chamber of UA5 in April 1981, CERN
Closeup of typical proton-antiproton interaction, as recorded in 1982