A modified simulated annealing algorithm for parameter determination for a hybrid virtual model.

In this work we present an algorithm based on the simulated annealing (SA) method for electron beam spectrum reconstruction from central axis PDD data. We use a simulated beam in order to assess the accuracy of the method, and compare it with others usually employed. We found that our modified SA algorithm produced excellent reconstructed PDDs and beam profiles and improved reconstructed spectra. We also tested our method for the simultaneous determination of an electron energy spectrum and the position of a trimmer from central axis PDD data, and found this to be sufficient for the determination of the physical parameters of this hybrid model.