Technique to measure the cosmic muon flux at the old Canfranc Underground Laboratory

A technique to measure the cosmic muon flux distribution has been developed in the old Canfranc Underground Laboratory (2450 m.w.e.).This technique can determine the muon direction and it allows to obtain a three-dimensional distribution of the muon intensity which could be correlated to the mountain profile, as well. The experimental set-up, which has been taking data since November 2008, consists of a Time Projection Chamber (TPC) detector and a veto system composed of two plastic scintillators.