PPS-Sim :  Polarised Positron Source Simulation in Geant4
    Copyright (C) 2009, 2010  S. Riemann, A. Schaelicke, A. Ushakov

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    full license for more details.

    You should have received a copy of the license along with this
    program.  If not, see <http://pps-sim.desy.de>.