3 // Switch on Transition Radiation simulation. 6/12/00 18:00
4 // iZDC=1 7/12/00 09:00
5 // ThetaRange is (0., 180.). It was (0.28,179.72) 7/12/00 09:00
6 // Theta range given through pseudorapidity limits 22/6/2001
8 // Set Random Number seed
9 // gRandom->SetSeed(12345);
11 new AliGeant3("C++ Interface to Geant3");
13 if (!gSystem->Getenv("CONFIG_FILE"))
15 TFile *rootfile = new TFile("galice.root", "recreate");
17 rootfile->SetCompressionLevel(2);
20 TGeant3 *geant3 = (TGeant3 *) gMC;
23 // Set External decayer
24 AliDecayer *decayer = new AliDecayerPythia();
26 decayer->SetForceDecay(kAll);
28 gMC->SetExternalDecayer(decayer);
31 //=======================================================================
32 // ******* GEANT STEERING parameters FOR ALICE SIMULATION *******
33 geant3->SetTRIG(1); //Number of events to be processed
34 geant3->SetSWIT(4, 10);
35 geant3->SetDEBU(0, 0, 1);
36 //geant3->SetSWIT(2,2);
47 geant3->SetHADR(1); //Select pure GEANH (HADR 1) or GEANH/NUCRIN (HADR 3)
51 geant3->SetAUTO(1); //Select automatic STMIN etc... calc. (AUTO 1) or manual (AUTO 0)
52 geant3->SetABAN(0); //Restore 3.16 behaviour for abandoned tracks
53 geant3->SetOPTI(2); //Select optimisation level for GEANT geometry searches (0,1,2)
54 geant3->SetERAN(5.e-7);
56 Float_t cut = 1.e-3; // 1MeV cut by default
57 Float_t tofmax = 1.e10;
59 // GAM ELEC NHAD CHAD MUON EBREM MUHAB EDEL MUDEL MUPA TOFMAX
60 geant3->SetCUTS(cut, cut, cut, cut, cut, cut, cut, cut, cut, cut,
63 //=======================================================================
64 // ************* STEERING parameters FOR ALICE SIMULATION **************
65 // --- Specify event type to be tracked through the ALICE setup
66 // --- All positions are in cm, angles in degrees, and P and E in GeV
67 if (gSystem->Getenv("CONFIG_NPARTICLES")){
68 int nParticles = atoi(gSystem->Getenv("CONFIG_NPARTICLES"));
72 //*********************************************
73 // Example for Fixed Particle Gun
74 //*********************************************
75 AliGenFixed *gener = new AliGenFixed(nParticles);
76 gener->SetMomentum(50);
79 gener->SetOrigin(0,0,0); //vertex position
80 gener->SetPart(13); //GEANT particle type
83 // Activate this line if you want the vertex smearing to happen
86 //gener->SetVertexSmear(perTrack);
88 gAlice->SetField(-999, 2); //Specify maximum magnetic field in Tesla (neg. ==> default field)
110 //=================== Alice BODY parameters =============================
111 AliBODY *BODY = new AliBODY("BODY", "Alice envelop");
114 //=================== MAG parameters ============================
115 // --- Start with Magnet since detector layouts may be depending ---
116 // --- on the selected Magnet dimensions ---
117 AliMAG *MAG = new AliMAG("MAG", "Magnet");
120 //=================== ABSO parameters ============================
121 AliABSO *ABSO = new AliABSOv0("ABSO", "Muon Absorber");
124 //=================== DIPO parameters ============================
125 AliDIPO *DIPO = new AliDIPOv2("DIPO", "Dipole version 2");
128 //=================== HALL parameters ============================
129 AliHALL *HALL = new AliHALL("HALL", "Alice Hall");
132 //=================== FRAME parameters ============================
133 AliFRAME *FRAME = new AliFRAMEv2("FRAME", "Space Frame");
136 //=================== SHIL parameters ============================
137 AliSHIL *SHIL = new AliSHILvF("SHIL", "Shielding");
140 //=================== PIPE parameters ============================
141 AliPIPE *PIPE = new AliPIPEv0("PIPE", "Beam Pipe");
144 //=================== ITS parameters ============================
146 // As the innermost detector in ALICE, the Inner Tracking System
147 // "impacts" on almost all other detectors. This involves the fact
148 // that the ITS geometry still has several options to be followed
149 //in parallel in order to determine the best set-up which minimizes
150 // the induced background. All the geometries available to date are
151 // described in the following. Read carefully the comments and use
152 // the default version (the only one uncommented) unless you are making
153 // comparisons and you know what you are doing. In this case just
154 // uncomment the ITS geometry you want to use and run Aliroot.
155 // Detailed geometries:
156 AliITSvPPRasymm *ITS = new AliITSvPPRasymm("ITS","New ITS PPR detailed version with asymmetric services");
157 ITS->SetMinorVersion(2); // don't touch this parameter if you're not an ITS developer
158 ITS->SetReadDet(kFALSE); // don't touch this parameter if you're not an ITS developer
159 ITS->SetThicknessDet1(200.); // detector thickness on layer 1 must be in the range [100,300]
160 ITS->SetThicknessDet2(200.); // detector thickness on layer 2 must be in the range [100,300]
161 ITS->SetThicknessChip1(200.); // chip thickness on layer 1 must be in the range [150,300]
162 ITS->SetThicknessChip2(200.);// chip thickness on layer 2 must be in the range [150,300]
163 ITS->SetRails(1); // 1 --> rails in ; 0 --> rails out
164 ITS->SetCoolingFluid(1); // 1 --> water ; 0 --> freon
165 // Geant3 <-> EUCLID conversion
166 // ============================
167 // SetEUCLID is a flag to output (=1) or not to output (=0) both
168 // geometry and media to two ASCII files (called by default
169 // ITSgeometry.euc and ITSgeometry.tme) in a format understandable
170 // to the CAD system EUCLID. The default (=0) means that you dont
171 // want to use this facility.
175 //============================ TPC parameters =========================
176 // This allows the user to specify sectors for the SLOW (TPC geometry
177 // 2) Simulator. SecAL (SecAU) <0 means that ALL lower (upper)
178 // sectors are specified, any value other than that requires at least
179 // one sector (lower or upper)to be specified!
180 // Reminder: sectors 1-24 are lower sectors ( 1-12->z>0,13-24->z<0)
181 // sectors 25-72 are the upper ones (25-48->z>0,49-72->z<0)
182 // SecLows - number of lower sectors specified (up to 6)
183 // SecUps - number of upper sectors specified (up to 12)
184 // Sens - sensitive strips for the Slow Simulator !!!
185 // This does NOT work if all S or L-sectors are specified, i.e.
186 // if SecAL or SecAU < 0
187 //---------------------------------------------------------------------
188 // gROOT->LoadMacro("SetTPCParam.C");
189 // AliTPCParam *param = SetTPCParam();
190 AliTPC *TPC = new AliTPCv2("TPC", "Default");
191 // All sectors included
196 //=================== TOF parameters ============================
197 AliTOF *TOF = new AliTOFv2("TOF", "normal TOF");
200 //=================== RICH parameters ===========================
201 AliRICH *RICH = new AliRICHv3("RICH", "normal RICH");
204 //=================== ZDC parameters ============================
205 AliZDC *ZDC = new AliZDCv2("ZDC", "normal ZDC");
208 //=================== TRD parameters ============================
209 AliTRD *TRD = new AliTRDv1("TRD", "TRD slow simulator");
210 // Select the gas mixture (0: 97% Xe + 3% isobutane, 1: 90% Xe +
213 // With hole in front of PHOS
215 // With hole in front of RICH
218 AliTRDsim *TRDsim = TRD->CreateTR();
221 //=================== FMD parameters ============================
222 AliFMD *FMD = new AliFMDv1("FMD", "normal FMD");
223 FMD->SetRingsSi1(256);
224 FMD->SetRingsSi2(64);
225 FMD->SetSectorsSi1(20);
226 FMD->SetSectorsSi2(24);
229 //=================== MUON parameters ===========================
230 AliMUON *MUON = new AliMUONv1("MUON", "default");
233 //=================== PHOS parameters ===========================
234 AliPHOS *PHOS = new AliPHOSv1("PHOS", "GPS2");
237 //=================== PMD parameters ============================
238 AliPMD *PMD = new AliPMDv1("PMD", "normal PMD");
239 PMD->SetPAR(1., 1., 0.8, 0.02);
240 PMD->SetIN(6., 18., -580., 27., 27.);
241 PMD->SetGEO(0.0, 0.2, 4.);
242 PMD->SetPadSize(0.8, 1.0, 1.0, 1.5);
245 //=================== EMCAL parameters ============================
246 AliEMCAL *EMCAL = new AliEMCALv1("EMCAL", "EMCALArch1a");
249 //=================== START parameters ============================
250 AliSTART *START = new AliSTARTv1("START", "START Detector");
253 //----------------------------------------------------------------------
254 Float_t EtaToTheta(Float_t arg){
255 return (180./TMath::Pi())*2.*atan(exp(-arg));