Pb-Pb collisions at 2.76A TeV - Nov. 2010
event displays by Steffen Weber
One of the first lead-lead collisions at the Large Hadron Collider, recorded by the ALICE detector in November 2010.
In this collision of lead nuclei at a small impact parameter (central collision), 1209 positively-charged (darker tracks) and 1197 negatively-charged (lighter tracks) particles are produced, about 80 percent are pions. The curvature of a track in the magnetic field of ALICE (0.5 T) is inversely proportional to the momentum of the particle.
The cylinder is the Time Projection Chamber of ALICE, with a diameter of 5 m and a length of 5 m, recording the charged particles in three dimensions with the equivalent of 500 million pixels.
NB: same event (time stamp 2010-11-09 00:12:33) as
this Fig. group
