5 // Switch on Transition Radiation simulation. 6/12/00 18:00
6 // iZDC=1 7/12/00 09:00
7 // ThetaRange is (0., 180.). It was (0.28,179.72) 7/12/00 09:00
8 // Theta range given through pseudorapidity limits 22/6/2001
10 // Set Random Number seed
11 // gRandom->SetSeed(12345);
13 // libraries required by geant321
14 gSystem->Load("libgeant321");
16 new TGeant3("C++ Interface to Geant3");
18 if (!gSystem->Getenv("CONFIG_FILE"))
20 TFile *rootfile = new TFile("galice.root", "recreate");
22 rootfile->SetCompressionLevel(2);
25 TGeant3 *geant3 = (TGeant3 *) gMC;
28 // Set External decayer
29 AliDecayer *decayer = new AliDecayerPythia();
31 decayer->SetForceDecay(kAll);
33 gMC->SetExternalDecayer(decayer);
36 //=======================================================================
37 // ******* GEANT STEERING parameters FOR ALICE SIMULATION *******
38 geant3->SetTRIG(1); //Number of events to be processed
39 geant3->SetSWIT(4, 10);
40 geant3->SetDEBU(0, 0, 1);
41 //geant3->SetSWIT(2,2);
52 geant3->SetHADR(1); //Select pure GEANH (HADR 1) or GEANH/NUCRIN (HADR 3)
56 geant3->SetAUTO(1); //Select automatic STMIN etc... calc. (AUTO 1) or manual (AUTO 0)
57 geant3->SetABAN(0); //Restore 3.16 behaviour for abandoned tracks
58 geant3->SetOPTI(2); //Select optimisation level for GEANT geometry searches (0,1,2)
59 geant3->SetERAN(5.e-7);
61 Float_t cut = 1.e-3; // 1MeV cut by default
62 Float_t tofmax = 1.e10;
64 // GAM ELEC NHAD CHAD MUON EBREM MUHAB EDEL MUDEL MUPA TOFMAX
65 geant3->SetCUTS(cut, cut, cut, cut, cut, cut, cut, cut, cut, cut,
68 //=======================================================================
69 // ************* STEERING parameters FOR ALICE SIMULATION **************
70 // --- Specify event type to be tracked through the ALICE setup
71 // --- All positions are in cm, angles in degrees, and P and E in GeV
72 if (gSystem->Getenv("CONFIG_NPARTICLES")){
73 int nParticles = atoi(gSystem->Getenv("CONFIG_NPARTICLES"));
77 //*********************************************
78 // Example for Fixed Particle Gun
79 //*********************************************
80 AliGenFixed *gener = new AliGenFixed(nParticles);
81 gener->SetMomentum(50);
84 gener->SetOrigin(0,0,0); //vertex position
85 gener->SetPart(kMuonMinus);
88 // Activate this line if you want the vertex smearing to happen
91 //gener->SetVertexSmear(perTrack);
93 gAlice->SetField(-999, 2); //Specify maximum magnetic field in Tesla (neg. ==> default field)
115 //=================== Alice BODY parameters =============================
116 AliBODY *BODY = new AliBODY("BODY", "Alice envelop");
119 //=================== MAG parameters ============================
120 // --- Start with Magnet since detector layouts may be depending ---
121 // --- on the selected Magnet dimensions ---
122 AliMAG *MAG = new AliMAG("MAG", "Magnet");
125 //=================== ABSO parameters ============================
126 AliABSO *ABSO = new AliABSOv0("ABSO", "Muon Absorber");
129 //=================== DIPO parameters ============================
130 AliDIPO *DIPO = new AliDIPOv2("DIPO", "Dipole version 2");
133 //=================== HALL parameters ============================
134 AliHALL *HALL = new AliHALL("HALL", "Alice Hall");
137 //=================== FRAME parameters ============================
138 AliFRAME *FRAME = new AliFRAMEv2("FRAME", "Space Frame");
141 //=================== SHIL parameters ============================
142 AliSHIL *SHIL = new AliSHILvF("SHIL", "Shielding");
145 //=================== PIPE parameters ============================
146 AliPIPE *PIPE = new AliPIPEv0("PIPE", "Beam Pipe");
149 //=================== ITS parameters ============================
151 // As the innermost detector in ALICE, the Inner Tracking System
152 // "impacts" on almost all other detectors. This involves the fact
153 // that the ITS geometry still has several options to be followed
154 //in parallel in order to determine the best set-up which minimizes
155 // the induced background. All the geometries available to date are
156 // described in the following. Read carefully the comments and use
157 // the default version (the only one uncommented) unless you are making
158 // comparisons and you know what you are doing. In this case just
159 // uncomment the ITS geometry you want to use and run Aliroot.
160 // Detailed geometries:
161 AliITSvPPRasymm *ITS = new AliITSvPPRasymm("ITS","New ITS PPR detailed version with asymmetric services");
162 ITS->SetMinorVersion(2); // don't touch this parameter if you're not an ITS developer
163 ITS->SetReadDet(kFALSE); // don't touch this parameter if you're not an ITS developer
164 ITS->SetThicknessDet1(200.); // detector thickness on layer 1 must be in the range [100,300]
165 ITS->SetThicknessDet2(200.); // detector thickness on layer 2 must be in the range [100,300]
166 ITS->SetThicknessChip1(200.); // chip thickness on layer 1 must be in the range [150,300]
167 ITS->SetThicknessChip2(200.);// chip thickness on layer 2 must be in the range [150,300]
168 ITS->SetRails(1); // 1 --> rails in ; 0 --> rails out
169 ITS->SetCoolingFluid(1); // 1 --> water ; 0 --> freon
170 // Geant3 <-> EUCLID conversion
171 // ============================
172 // SetEUCLID is a flag to output (=1) or not to output (=0) both
173 // geometry and media to two ASCII files (called by default
174 // ITSgeometry.euc and ITSgeometry.tme) in a format understandable
175 // to the CAD system EUCLID. The default (=0) means that you dont
176 // want to use this facility.
180 //============================ TPC parameters =========================
181 // This allows the user to specify sectors for the SLOW (TPC geometry
182 // 2) Simulator. SecAL (SecAU) <0 means that ALL lower (upper)
183 // sectors are specified, any value other than that requires at least
184 // one sector (lower or upper)to be specified!
185 // Reminder: sectors 1-24 are lower sectors ( 1-12->z>0,13-24->z<0)
186 // sectors 25-72 are the upper ones (25-48->z>0,49-72->z<0)
187 // SecLows - number of lower sectors specified (up to 6)
188 // SecUps - number of upper sectors specified (up to 12)
189 // Sens - sensitive strips for the Slow Simulator !!!
190 // This does NOT work if all S or L-sectors are specified, i.e.
191 // if SecAL or SecAU < 0
192 //---------------------------------------------------------------------
193 // gROOT->LoadMacro("SetTPCParam.C");
194 // AliTPCParam *param = SetTPCParam();
195 AliTPC *TPC = new AliTPCv2("TPC", "Default");
196 // All sectors included
201 //=================== TOF parameters ============================
202 AliTOF *TOF = new AliTOFv2("TOF", "normal TOF");
205 //=================== RICH parameters ===========================
206 AliRICH *RICH = new AliRICHv3("RICH", "normal RICH");
209 //=================== ZDC parameters ============================
210 AliZDC *ZDC = new AliZDCv2("ZDC", "normal ZDC");
213 //=================== TRD parameters ============================
214 AliTRD *TRD = new AliTRDv1("TRD", "TRD slow simulator");
215 // Select the gas mixture (0: 97% Xe + 3% isobutane, 1: 90% Xe +
218 // With hole in front of PHOS
220 // With hole in front of RICH
223 AliTRDsim *TRDsim = TRD->CreateTR();
226 //=================== FMD parameters ============================
227 AliFMD *FMD = new AliFMDv1("FMD", "normal FMD");
228 FMD->SetRingsSi1(256);
229 FMD->SetRingsSi2(64);
230 FMD->SetSectorsSi1(20);
231 FMD->SetSectorsSi2(24);
234 //=================== MUON parameters ===========================
235 AliMUON *MUON = new AliMUONv1("MUON", "default");
238 //=================== PHOS parameters ===========================
239 AliPHOS *PHOS = new AliPHOSv1("PHOS", "GPS2");
242 //=================== PMD parameters ============================
243 AliPMD *PMD = new AliPMDv1("PMD", "normal PMD");
244 PMD->SetPAR(1., 1., 0.8, 0.02);
245 PMD->SetIN(6., 18., -580., 27., 27.);
246 PMD->SetGEO(0.0, 0.2, 4.);
247 PMD->SetPadSize(0.8, 1.0, 1.0, 1.5);
250 //=================== EMCAL parameters ============================
251 AliEMCAL *EMCAL = new AliEMCALv1("EMCAL", "G56_2_55_19_104_14");
254 //=================== T0 parameters ============================
255 AliT0 *T0 = new AliT0v1("T0", "T0 Detector");
258 //----------------------------------------------------------------------
259 Float_t EtaToTheta(Float_t arg){
260 return (180./TMath::Pi())*2.*atan(exp(-arg));