Muon Production Height investigated by the Air-Shower Experiment KASCADE-Grande

A large area (128 m 2 ) Muon Tracking Detector (MTD), located within the KASCADE experiment, has been built with the aim to identify muons ( E μ > 0.8 GeV ) and their directions in extensive air showers by track measurements under more than 18 r.l. shielding. The orientation of the muon track with respect to the shower axis is expressed in terms of the radial- and tangential angles. By means of triangulation the muon production height H μ is determined. By means of H μ , a transition from light to heavy cosmic ray primary particles with increasing shower energy E o from 1–10 PeV is observed.