outdated/mpiTools/macros/gconfig/g4Config.C File Reference

Go to the source code of this file.

Functions
void	Config ()

Function Documentation

void Config

(

)

Create the run configuration In constructor user has to specify the geometry input and select geometry navigation via the following options:

• geomVMCtoGeant4 - geometry defined via VMC, G4 native navigation
• geomVMCtoRoot - geometry defined via VMC, Root navigation
• geomRoot - geometry defined via Root, Root navigation
• geomRootToGeant4 - geometry defined via Root, G4 native navigation
• geomGeant4 - geometry defined via Geant4, G4 native navigation

The second argument in the constructor selects physics list:

• emStandard - standard em physics (default)
• emStandard+optical - standard em physics + optical physics
• XYZ - selected hadron physics list ( XYZ = LHEP, QGSP, ...)
• XYZ+optical - selected hadron physics list + optical physics

The third argument activates the special processes in the TG4SpecialPhysicsList, which implement VMC features:

• stepLimiter - step limiter (default)
• specialCuts - VMC cuts
• specialControls - VMC controls for activation/inactivation selected processes
• stackPopper - stackPopper process When more than one options are selected, they should be separated with '+' character: eg. stepLimit+specialCuts.

Create the G4 VMC

create the Specific stack

Customise Geant4 setting (verbose level, global range cut, ..)

Definition at line 2 of file outdated/mpiTools/macros/gconfig/g4Config.C.

References cut, cuts, PndStack::SetMinPoints(), PndStack::StoreSecondaries(), and TString.

{

   TG4RunConfiguration* runConfiguration 
           = new TG4RunConfiguration("geomRoot", "QGSP_BERT_EMV", "stepLimiter+specialCuts+specialControls");

   TGeant4* geant4 = new TGeant4("TGeant4", "The Geant4 Monte Carlo", runConfiguration);
   cout << "Geant4 has been created." << endl;

   PndStack *stack = new PndStack(1000); 
   stack->StoreSecondaries(kFALSE);
   stack->SetMinPoints(0);
   geant4->SetStack(stack);

   if(FairRunSim::Instance()->IsExtDecayer()){
      TVirtualMCDecayer* decayer = TPythia6Decayer::Instance();
      geant4->SetExternalDecayer(decayer);
   }
  

   TString configm(gSystem->Getenv("CONFIG_DIR"));
   configm1 = configm + "/g4config.in";
   cout << " -I g4Config() using g4conf  macro: " << configm1 << endl;

   // set the common cuts 
   TString cuts = configm + "/SetCuts.C";
   cout << "Physics cuts with script \n "<<  cuts.Data() << endl;
   Int_t cut=gROOT->LoadMacro(cuts.Data());
   if(cut==0)gInterpreter->ProcessLine("SetCuts()"); 

   //set geant4 specific stuff
  geant4->SetMaxNStep(10000);  // default is 30000
  geant4->ProcessGeantMacro(configm1.Data());

}