Tests Of The Charged Particle Stepper With Muons

The muons reconstruction package for the SID/ILC detector has been extended to include the Electro-Magnetic Calorimeter. The procedure previously used to reconstruct the charged tracks, an helical fit approximation, has been replaced by a step by step analytical method accounting for the magnetic field and the energy loss by ionization. The trajectory of the muons and the impact of the method on the muon identification efficiency is analyzed. One compares the behavior of muons of different energies in the (x,y)plane and the (px,py) plane of the sub-detectors.