Fine shashlik simulation from tests results

We have studied the response uniformity of the LHCb electromagnetic calorimeter modules in a beam of high energy muons. Tests of prototype module built with thin (0.5 mm) absorber and scintillator plates were performed as well as transverse scans of an ECAL module with 50 GeV electrons. To understand the light collection uniformity a dedicated Monte Carlo program for the the light propagation in different scintillator tiles was developed. Parameters of this program are tuned and checked using experimental data