CERN document. 15/09 16:50hs.

One of the first images from CMS, showing the debris of particles picked up in the detector's calorimeters and muon chambers after the beam was steered into the collimator (tungsten block) at point 5

One of the first images from CMS, showing the debris of particles picked up in the detector's calorimeters and muon chambers after the beam was steered into the collimator (tungsten block) at point 5 

A cross-section image of CMS showing debris (or "splash") of particles entering the detector when the LHC beam was steered into the collimator (tungsten block) at point 5, at around 9:50am, September 10 

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