Beispiel #1
0
void gen(Int_t nev = 1, 
         const char* genConfig = "$ALICE_ROOT/MUON/macros/genTestConfig.C")
{
  // Load libraries
  // gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/include -I$ALICE_ROOT");
  gSystem->Load("liblhapdf");      // Parton density functions
  gSystem->Load("libEGPythia6");   // TGenerator interface
  gSystem->Load("libpythia6");     // Pythia
  gSystem->Load("libAliPythia6");  // ALICE specific implementations

  AliPDG::AddParticlesToPdgDataBase();
  TDatabasePDG::Instance();

  // Run loader
  AliRunLoader* rl = AliRunLoader::Open("galice.root","FASTRUN","recreate");
  
  rl->SetCompressionLevel(2);
  rl->SetNumberOfEventsPerFile(nev);
  rl->LoadKinematics("RECREATE");
  rl->MakeTree("E");
  gAlice->SetRunLoader(rl);
  
  //  Create stack
  rl->MakeStack();
  AliStack* stack = rl->Stack();
  
  //  Header
  AliHeader* header = rl->GetHeader();
  
  //  Create and Initialize Generator
  gROOT->LoadMacro(genConfig);
  AliGenerator* gener = genConfig();

  // Go to galice.root
  rl->CdGAFile();

  // Forbid some decays. Do it after gener->Init(0, because
  // the initialization of the generator includes reading of the decay table.
  // ...

  //
  // Event Loop
  //
  
  TStopwatch timer;
  timer.Start();
  for (Int_t iev = 0; iev < nev; iev++) {
    
    cout <<"Event number "<< iev << endl;
    
    // Initialize event
    header->Reset(0,iev);
    rl->SetEventNumber(iev);
    stack->Reset();
    rl->MakeTree("K");
    
    // Generate event
    stack->Reset();
    stack->ConnectTree(rl->TreeK());
    gener->Generate();
    cout << "Number of particles " << stack->GetNprimary() << endl;
    
    // Finish event
    header->SetNprimary(stack->GetNprimary());
    header->SetNtrack(stack->GetNtrack());  
    
    // I/O
    stack->FinishEvent();
    header->SetStack(stack);
    rl->TreeE()->Fill();
    rl->WriteKinematics("OVERWRITE");
    
  } // event loop
  timer.Stop();
  timer.Print();
  
  //                         Termination
  //  Generator
  gener->FinishRun();
  //  Write file
  rl->WriteHeader("OVERWRITE");
  gener->Write();
  rl->Write();
}
Beispiel #2
0
void fastGen(Tune_t tune = kPyTuneCDFA , Float_t energy, Int_t nev = 1, TString process)
{
  // Add all particles to the PDG database
  AliPDG::AddParticlesToPdgDataBase();

  // set the random seed
  TDatime date;
  UInt_t seed    = date.Get()+gSystem->GetPid();
  gRandom->SetSeed(seed);
  cout<<"Seed for random number generation= "<<seed<<endl; 


  //  Runloader  
  AliRunLoader* rl = AliRunLoader::Open("galice.root", "FASTRUN","recreate");
    
  rl->SetCompressionLevel(2);
  rl->SetNumberOfEventsPerFile(nev);
  rl->LoadKinematics("RECREATE");
  rl->MakeTree("E");
  gAlice->SetRunLoader(rl);

  //  Create stack
  rl->MakeStack();
  AliStack* stack      = rl->Stack();
 
  //  Header
  AliHeader* header = rl->GetHeader();
  //
  //  Create and Initialize Generator
  AliGenerator *gener = CreateGenerator(tune,energy);
  gener->Init();
  // if nsd switch off single diffraction
  if ( process == "NSD"){
    if(tune != kPhojet) {
      AliPythia::Instance()->	SetMSUB(92,0);             // single diffraction AB-->XB
      AliPythia::Instance()-> SetMSUB(93,0);             // single diffraction AB-->AX
    }
    else {
      cout << "NSD not yet implemented in the phojet case" << endl;
      exit(1);
    }
  }
  gener->SetStack(stack);
    
  //
  //                        Event Loop
  //
  Int_t iev;
     
  for (iev = 0; iev < nev; iev++) {

    if(!(iev%500)) printf("\n \n Event number %d \n \n", iev);
	
    //  Initialize event
    header->Reset(0,iev);
    rl->SetEventNumber(iev);
    stack->Reset();
    rl->MakeTree("K");
    //	stack->ConnectTree();
    
    //  Generate event
    gener->Generate();
    //  Analysis
    // 	Int_t npart = stack->GetNprimary();
    // 	printf("Analyse %d Particles\n", npart);
    // 	for (Int_t part=0; part<npart; part++) {
    // 	    TParticle *MPart = stack->Particle(part);
    // 	    Int_t mpart  = MPart->GetPdgCode();
    // 	    printf("Particle %d\n", mpart);
    // 	}
	
    //  Finish event
    header->SetNprimary(stack->GetNprimary());
    header->SetNtrack(stack->GetNtrack());  
    //      I/O
    //	
    stack->FinishEvent();
    header->SetStack(stack);
    rl->TreeE()->Fill();
    rl->WriteKinematics("OVERWRITE");

  } // event loop
    //
    //                         Termination
    //  Generator
  gener->FinishRun();
  //  Write file
  rl->WriteHeader("OVERWRITE");
  gener->Write();
  rl->Write();
    
}