Full description and pictures from the evenings achievements can be found here
ATLAS event displays and related information from the LHC restart in Nov 2009. We recorded today, Friday Nov 20, the first so-called “Beam Splash” events. For these events the beam in one arm of the LHC was dumped onto closed collimators located 140 meters upstream and downstream of ATLAS. The collision leads to a large number of detectable secondary particles longitudinally traversing the detector.
All displays shown here are produced very shortly after the data were taken, using unprocessed raw events from the ATLAS detector.
