Geane.C

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/********************************************************************************
 *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
 *                                                                              *
 *              This software is distributed under the terms of the             *
 *              GNU Lesser General Public Licence (LGPL) version 3,             *
 *                  copied verbatim in the file "LICENSE"                       *
 ********************************************************************************/

// Configuration macro for Geane VirtualMC

void Config()
{
    TGeant3TGeo* gMC3 = new TGeant3TGeo("C++ Interface to Geant3");
    cout << "-I- G3Config: Geant3 with TGeo has been created for Geane." << endl;
    // create Fair Specific Stack
    FairStack* st = new FairStack(10);
    gMC3->SetStack(st);

    // ******* GEANEconfiguration for simulated Runs  *******
    gMC3->SetDEBU(0, 0, 1);
    gMC3->SetSWIT(4, 10);

    gMC3->SetDCAY(0);
    gMC3->SetPAIR(0);
    gMC3->SetCOMP(0);
    gMC3->SetPHOT(0);
    gMC3->SetPFIS(0);
    gMC3->SetDRAY(0);
    gMC3->SetANNI(0);
    gMC3->SetBREM(1);
    gMC3->SetMUNU(0);
    gMC3->SetCKOV(0);
    gMC3->SetHADR(0);   // Select pure GEANH (HADR 1) or GEANH/NUCRIN (HADR 3)//4 fluka 5 gcalor
    gMC3->SetLOSS(4);
    gMC3->SetMULS(1);   // 1=Moliere,3=Gaussian
    gMC3->SetRAYL(0);
    gMC3->SetSTRA(0);

    gMC3->SetAUTO(1);   // Select automatic STMIN etc... calc. (AUTO 1) or manual (AUTO 0)
    gMC3->SetABAN(0);   // Restore 3.16 behaviour for abandoned tracks
    gMC3->SetOPTI(0);   // Select optimisation level for GEANT geometry searches (0,1,2)
    gMC3->SetERAN(5.e-7);

    // -------->>>>> PAY ATTENTION!!!!!
    // For a correct use of GEANE, you MUST use the cuts as set below!!!
    // i.e. Since GEANE is tracking only the primary particle, DCUTE, DCUTM, BCUTE and BCUTM must be put
    // at very high values (10 TeV) in order to calculate properly the energy loss.
    // For a more complete explanation of the chosen values, refer to GEANT manual

    Float_t cut = 1.e-3;                         // 1 MeV cut by default
    Float_t cutd = 1.e4;                         // 10 TeV - Threshold for delta-rays
    Float_t cutb = cutd;                         // 10 TeV - Cut for bremsstrahlung
    Float_t tofmax = 1.e10;                      // seconds
    Float_t usrcuts[5] = {0., 0., 0., 0., 0.};   // usercuts
    Float_t gcalpha = 0.999;                     // Optimal value for alpha

    cout << "Energy straggling area parameter from user set to: " << gcalpha << endl;
    if (gcalpha < 0.9) {
        gcalpha = 0.9;
        cout << "User alpha parameter too low: forced to 0.9" << endl;
    }

    // set cuts here
    //             GAM ELEC NHAD CHAD MUON EBREM MUHAB EDEL MUDEL MUPA TOFMAX
    gMC3->SetCUTS(cut,      // CUTGAM = gammas
                  cut,      // CUTELE = electrons
                  cut,      // CUTNEU = neutral hadrons
                  cut,      // CUTHAD = charged hadrons
                  cut,      // CUTMUO = muons
                  cutb,     // BCUTE  = electron bremsstrahlung
                  cutb,     // BCUTM  = muon bremsstrahlung
                  cutd,     // DCUTE  = delta rays by electrons
                  cutd,     // DCUTM  = delta rays by muons
                  cutb,     // PPCUTM = pair production by muons
                  tofmax,   // TOFMAX = time of flight cut
                  usrcuts);

    gMC3->SetECut(gcalpha);
}