First proton interactions

… reconstructed Vertex Locator VELO track. Other reconstructed events can be found here.

… event reconstructed later (offline reconstruction). Particularly interesting is the blue track recorded in the Vertex Locator VELO and in the tracking chambers after the magnet.

… not yet proton-proton interaction but interactions of the protons with residual gas inside LHC ring. Tracks reconstructed during data taking.