enum gentype_t {hijing, gun, box, pythia, param, cocktail, fluka, halo, ntuple, scan, doublescan}; gentype_t gentype=param; Int_t ntracks=1000; void Config() { gSystem->Load("libgeant321"); new TGeant3("C++ Interface to Geant3"); TGeant3 *geant3 = (TGeant3*)gMC; //======================================================================= // Create the output file TFile *rootfile = new TFile("galice.root","recreate"); rootfile->SetCompressionLevel(2); TGeant3 *geant3 = (TGeant3*)gMC; //======================================================================= // ******* GEANT STEERING parameters FOR ALICE SIMULATION ******* geant3->fGctrak->maxnst=1000000; geant3->SetTRIG(1); //Number of events to be processed geant3->SetSWIT(4,100); geant3->SetDEBU(0,0,1); geant3->SetDCAY(1); geant3->SetPAIR(1); geant3->SetCOMP(1); geant3->SetPHOT(1); geant3->SetPFIS(0); geant3->SetDRAY(1); geant3->SetANNI(1); geant3->SetBREM(1); geant3->SetMUNU(1); geant3->SetCKOV(0); geant3->SetHADR(4); //Select pure GEANH (HADR 1) or GEANH/NUCRIN (HADR 3) geant3->SetLOSS(1); geant3->SetMULS(1); geant3->SetRAYL(0); geant3->SetAUTO(0); //Select automatic STMIN etc... calc. (AUTO 1) or manual (AUTO 0) geant3->SetABAN(0); //Restore 3.16 behaviour for abandoned tracks geant3->SetOPTI(2); //Select optimisation level for GEANT geometry searches (0,1,2) Float_t cut = 1.e-1; // 100MeV cut by default Float_t tofmax = 1.e10; // GAM ELEC NHAD CHAD MUON EBREM MUHAB EDEL MUDEL MUPA TOFMAX geant3->SetCUTS(1.e-4, 1.e-4, 1.e-3, 1.e-4, 1.e-4, cut, cut, cut, cut, cut, 1.e-5); gAlice->TrackingLimits( 700, 2200); // //======================================================================= // ************* STEERING parameters FOR ALICE SIMULATION ************** // --- Specify event type to be tracked through the ALICE setup // --- All positions are in cm, angles in degrees, and P and E in GeV switch(gentype) { case gun: //********************************************* // Example for Fixed Particle Gun * //********************************************* AliGenFixed *gener = new AliGenFixed(ntracks); gener->SetMomentum(3); gener->SetPhiRange(0); gener->SetThetaRange(0); gener->SetOrigin(0,0,0); //vertex position gener->SetPart(kProton); //GEANT particle type break; case box: //********************************************* // Example for Moving Particle Gun * //********************************************* AliGenBox *gener = new AliGenBox(ntracks); gener->SetMomentumRange(3,4); gener->SetPhiRange(-360,360); gener->SetThetaRange(2., 10.); gener->SetOrigin(25,25,510.5); gener->SetVertexSmear(kPerTrack); //vertex position gener->SetSigma(1.8, 1.8,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetPart(kProton); //GEANT particle type break; case scan: //********************************************* // Scanning on a grid * //********************************************* AliGenScan *gener = new AliGenScan(-1); gener->SetMomentumRange(20,20); gener->SetPhiRange(90,90); gener->SetThetaRange(0,0); //vertex position gener->SetSigma(3,3,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetPart(kMuonMinus); gener->SetRange(20, -100, 100, 20, -100, 100, 1, 500, 500); break; case doublescan: //********************************************* // Scanning on a grid * //********************************************* AliGenDoubleScan *gener = new AliGenDoubleScan(-1); gener->SetMomentumRange(4,4); gener->SetPhiRange(0,360); gener->SetThetaRange(0,0); //vertex position gener->SetSigma(3,3,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetPart(8); gener->SetRange(20, -100, 100, 20, -100, 100, 1, 500, 500); gener->SetDistance(1); break; case hijing: AliGenHIJINGpara *gener = new AliGenHIJINGpara(ntracks); gener->SetMomentumRange(0,999); gener->SetPhiRange(0,360); gener->SetThetaRange(0.104,33.52); gener->SetOrigin(0,0,0); //vertex position gener->SetSigma(0,0,5.6); //Sigma in (X,Y,Z) (cm) on IP position break; case pythia: //******************************************** // Example for Charm Production with Pythia * //******************************************** AliGenPythia *gener = new AliGenPythia(ntracks); gener->SetMomentumRange(0,999); gener->SetPhiRange(0,360); gener->SetThetaRange(0., 180.); gener->SetYRange(-10,10); gener->SetPtRange(0,100); gener->SetOrigin(0,0,0); // vertex position gener->SetVertexSmear(kPerEvent); gener->SetSigma(0,0,5.6); // Sigma in (X,Y,Z) (cm) on IP position gener->SetProcess(kPyCharm); gener->SetEnergyCMS(5500.); break; case param: //******************************************************* // Example for J/psi Production from Parameterisation * //******************************************************* AliGenParam *gener = new AliGenParam(ntracks, AliGenMUONlib::kUpsilon); gener->SetMomentumRange(0,999); gener->SetPtRange(0,100.); gener->SetPhiRange(0,360); gener->SetYRange(2.5,4); gener->SetPtRange(0,50); gener->SetOrigin(0,0,0); //vertex position gener->SetSigma(0,0,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetForceDecay(kDiMuon); gener->SetCutOnChild(1); gener->SetChildThetaRange(2,9); gener->SetTrackingFlag(1); break; case fluka: //******************************************************* // Example for a FLUKA Boundary Source * //******************************************************* AliGenFLUKAsource *gener = new AliGenFLUKAsource(-1); gener->AddFile("$(ALICE_ROOT)/data/all32.root"); rootfile->cd(); gener->SetPartFlag(7); gener->SetMomentumRange(0,999); gener->SetPhiRange(0,360); gener->SetThetaRange(0., 180.); gener->SetAgeMax(1.e-5); // 31.7 events gener->SetFraction(0.0315); break; case ntuple: //******************************************************* // Example for reading from a external file * //******************************************************* AliGenExtFile *gener = new AliGenExtFile(-1); gener->SetFileName("$(ALICE_ROOT)/data/pbpb.root"); gener->SetThetaRange(0.104,33.52); gener->SetOrigin(0,0,0); //vertex position gener->SetSigma(0,0,5.6); //Sigma in (X,Y,Z) (cm) on IP position gener->SetVertexSmear(kPerTrack); gener->SetTrackingFlag(1); break; case halo: //******************************************************* // Example for Tunnel Halo Source * //******************************************************* AliGenHalo *gener = new AliGenHalo(ntracks); gener->SetFileName("/h1/morsch/marsip/marsip5.mu"); break; case cocktail: //******************************************************* // Example for a Cocktail * //******************************************************* AliGenCocktail *gener = new AliGenCocktail(); gener->SetMomentumRange(0,10); gener->SetPhiRange(0,360); gener->SetThetaRange(45.,135); pions = new AliGenParam(100, AliGenMUONlib::kPion); gener->AddGenerator(pions , "Pions" , 100); break; } // Activate this line if you want the vertex smearing to happen // track by track // gener->Init(); gAlice->SetField(-2,1); //Specify maximum magnetic field in Tesla (neg. ==> default field) Int_t iMAG =0; Int_t iABSO =0; Int_t iDIPO =0; Int_t iSHIL =0; Int_t iPIPE =0; Int_t iMUON =1; //=================== Alice BODY parameters ============================= AliBODY *BODY = new AliBODY("BODY","Alice envelop"); if(iMAG) { //=================== MAG parameters ============================ // --- Start with Magnet since detector layouts may be depending --- // --- on the selected Magnet dimensions --- AliMAG *MAG = new AliMAG("MAG","Magnet"); } if(iABSO) { //=================== ABSO parameters ============================ AliABSO *ABSO = new AliABSOv1("ABSO","Muon Absorber"); } if(iDIPO) { //=================== DIPO parameters ============================ AliDIPO *DIPO = new AliDIPOv2("DIPO","Dipole version 2"); } if(iSHIL) { //=================== SHIL parameters ============================ AliSHIL *SHIL = new AliSHILv1("SHIL","Shielding"); } if(iPIPE) { //=================== PIPE parameters ============================ AliPIPE *PIPE = new AliPIPEv0("PIPE","Beam Pipe"); } if(iMUON) { //=================== MUON parameters =========================== AliMUON *MUON = new AliMUONv0("MUON","normal MUON"); MUON->SetAcceptance(kTRUE, 0.1, 12.); MUON->SetIshunt(0); MUON->SetMaxStepGas(0.1); MUON->SetMaxStepAlu(0.1); } }