4 // Set Random Number seed
5 gRandom->SetSeed(12345);
7 // =============================
10 // load Geant4 and AliRoot steer libraries
11 if (!gInterpreter->IsLoaded("g4libs.C")) gROOT->LoadMacro("g4libs.C");
12 gInterpreter->ProcessLine("g4libs()");
13 gInterpreter->ProcessLine("steerlibs()");
16 if (!gInterpreter->IsLoaded("g4menu.C")) gROOT->LoadMacro("g4menu.C");
17 gInterpreter->ProcessLine("CreateGeant4()");
19 //=======================================================================
20 // Create the output file
22 TFile *rootfile = new TFile("galice.root","recreate");
23 rootfile->SetCompressionLevel(2);
26 // Set External decayer
27 //AliDecayer* decayer = new AliDecayerPythia();
28 //decayer->SetForceDecay(all);
30 //gMC->SetExternalDecayer(decayer);
32 //=======================================================================
33 // ******* GEANT STEERING parameters FOR ALICE SIMULATION *******
34 // Physics process control
36 gMC ->SetProcess("DCAY",1);
37 gMC ->SetProcess("PAIR",1);
38 gMC ->SetProcess("COMP",1);
39 gMC ->SetProcess("PHOT",1);
40 gMC ->SetProcess("PFIS",0);
41 gMC ->SetProcess("DRAY",0);
42 gMC ->SetProcess("ANNI",1);
43 gMC ->SetProcess("BREM",1);
44 gMC ->SetProcess("MUNU",1);
45 //xx gMC ->SetProcess("CKOV",1);
46 gMC ->SetProcess("HADR",1); //Select pure GEANH (HADR 1) or GEANH/NUCRIN (HADR 3)
47 gMC ->SetProcess("LOSS",2);
48 gMC ->SetProcess("MULS",1);
49 //xx gMC ->SetProcess("RAYL",1);
53 Float_t cut = 1.e-3; // 1MeV cut by default
54 gMC ->SetCut("CUTGAM",cut);
55 gMC ->SetCut("CUTELE",cut);
56 gMC ->SetCut("CUTNEU",cut);
57 gMC ->SetCut("CUTHAD",cut);
58 gMC ->SetCut("CUTMUO",cut);
59 gMC ->SetCut("BCUTE",cut);
60 gMC ->SetCut("BCUTM",cut);
61 gMC ->SetCut("DCUTE",cut);
62 gMC ->SetCut("DCUTM",cut);
63 //xx gMC ->SetCut("PPCUTM",cut);
66 //=======================================================================
67 // ************* STEERING parameters FOR ALICE SIMULATION **************
68 // --- Specify event type to be tracked through the ALICE setup
69 // --- All positions are in cm, angles in degrees, and P and E in GeV
70 //AliGenHIJINGpara *gener = new AliGenHIJINGpara(84210);
71 AliGenHIJINGpara *gener = new AliGenHIJINGpara(100);
72 gener->SetMomentumRange(0,999);
73 gener->SetPhiRange(0,360);
74 // gener->SetThetaRange(0.28,179.72);
75 gener->SetThetaRange(0.,180.);
76 gener->SetOrigin(0,0,0); //vertex position
77 gener->SetSigma(0,0,0); //Sigma in (X,Y,Z) (cm) on IP position
80 // Activate this line if you want the vertex smearing to happen
83 //gener->SetVertexSmear(perTrack);
85 //gAlice->SetField(-999,2); //Specify maximum magnetic field in Tesla (neg. ==> default field)
88 // =============================
91 //Bool_t isSetInteractively = false;
92 Bool_t isSetInteractively = true;
94 if (!isSetInteractively) {
96 // Load modules libraries
97 gInterpreter->ProcessLine("detlibs()");
121 // Exclude detectors that do not work with Geant4
123 // Detectors with temporary problem
126 // From G3 ConfigPPR.C
127 // Without any modification
129 //=================== Alice BODY parameters =============================
130 AliBODY *BODY = new AliBODY("BODY","Alice envelop");
133 //=================== MAG parameters ============================
134 // --- Start with Magnet since detector layouts may be depending ---
135 // --- on the selected Magnet dimensions ---
136 AliMAG *MAG = new AliMAG("MAG","Magnet");
141 //=================== ABSO parameters ============================
142 AliABSO *ABSO = new AliABSOv0("ABSO","Muon Absorber");
146 //=================== DIPO parameters ============================
148 AliDIPO *DIPO = new AliDIPOv2("DIPO","Dipole version 2");
152 //=================== HALL parameters ============================
154 AliHALL *HALL = new AliHALL("HALL","Alice Hall");
159 //=================== FRAME parameters ============================
161 AliFRAME *FRAME = new AliFRAMEv1("FRAME","Space Frame");
166 //=================== SHIL parameters ============================
168 AliSHIL *SHIL = new AliSHILv0("SHIL","Shielding");
173 //=================== PIPE parameters ============================
175 AliPIPE *PIPE = new AliPIPEv0("PIPE","Beam Pipe");
180 //=================== ITS parameters ============================
182 // As the innermost detector in ALICE, the Inner Tracking System "impacts" on
183 // almost all other detectors. This involves the fact that the ITS geometry
184 // still has several options to be followed in parallel in order to determine
185 // the best set-up which minimizes the induced background. All the geometries
186 // available to date are described in the following. Read carefully the comments
187 // and use the default version (the only one uncommented) unless you are making
188 // comparisons and you know what you are doing. In this case just uncomment the
189 // ITS geometry you want to use and run Aliroot.
191 // Detailed geometries:
192 // ====================
195 //AliITS *ITS = new AliITSv3("ITS","Old ITS detailed version as of the ALICE TP");
197 //AliITS *ITS = new AliITSv5("ITS","Current ITS detailed version used for the ITS TDR");
199 //AliITS *ITS = new AliITSv5symm("ITS","Updated ITS TDR detailed version with symmetric services");
201 AliITS *ITS = new AliITSv5asymm("ITS","Updates ITS TDR detailed version with asymmetric services");
204 // Coarse geometries (warning: no hits are produced with these coarse geometries and they unuseful for reconstruction !):
205 // ======================================================================================================================
208 //AliITS *ITS = new AliITSv1("ITS","Old ITS coarse version as of the ALICE TP");
210 //AliITS *ITS = new AliITSvPPRcoarseasymm("ITS","New ITS coarse version with asymmetric services");
212 //AliITS *ITS = new AliITSvPPRcoarsesymm("ITS","New ITS coarse version with symmetric services");
215 // Geant3 <-> EUCLID conversion
216 // ============================
218 // SetEUCLID is a flag to output (=1) or not to output (=0) both geometry and
219 // media to two ASCII files (called by default ITSgeometry.euc and
220 // ITSgeometry.tme) in a format understandable to the CAD system EUCLID.
221 // The default (=0) means that you dont want to use this facility.
229 //============================ TPC parameters ================================
230 // --- This allows the user to specify sectors for the SLOW (TPC geometry 2)
231 // --- Simulator. SecAL (SecAU) <0 means that ALL lower (upper)
232 // --- sectors are specified, any value other than that requires at least one
233 // --- sector (lower or upper)to be specified!
234 // --- Reminder: sectors 1-24 are lower sectors (1-12 -> z>0, 13-24 -> z<0)
235 // --- sectors 25-72 are the upper ones (25-48 -> z>0, 49-72 -> z<0)
236 // --- SecLows - number of lower sectors specified (up to 6)
237 // --- SecUps - number of upper sectors specified (up to 12)
238 // --- Sens - sensitive strips for the Slow Simulator !!!
239 // --- This does NOT work if all S or L-sectors are specified, i.e.
240 // --- if SecAL or SecAU < 0
243 //-----------------------------------------------------------------------------
245 // gROOT->LoadMacro("SetTPCParam.C");
246 // AliTPCParam *param = SetTPCParam();
247 AliTPC *TPC = new AliTPCv2("TPC","Default");
248 // All sectors included
256 //=================== TOF parameters ============================
257 AliTOF *TOF = new AliTOFv2("TOF","normal TOF");
261 //=================== RICH parameters ===========================
262 AliRICH *RICH = new AliRICHv1("RICH","normal RICH");
268 //=================== ZDC parameters ============================
270 AliZDC *ZDC = new AliZDCv1("ZDC","normal ZDC");
274 //=================== CASTOR parameters ============================
276 AliCASTOR *CASTOR = new AliCASTORv1("CASTOR","normal CASTOR");
280 //=================== TRD parameters ============================
282 AliTRD *TRD = new AliTRDv1("TRD","TRD slow simulator");
284 // Select the gas mixture (0: 97% Xe + 3% isobutane, 1: 90% Xe + 10% CO2)
287 // With hole in front of PHOS
289 // With hole in front of RICH
292 AliTRDsim *TRDsim = TRD->CreateTR();
296 //=================== FMD parameters ============================
298 AliFMD *FMD = new AliFMDv0("FMD","normal FMD");
302 //=================== MUON parameters ===========================
303 AliMUON *MUON = new AliMUONv0("MUON","normal MUON");
306 //=================== PHOS parameters ===========================
309 AliPHOS *PHOS = new AliPHOSv1("PHOS","GPS2");
314 //=================== PMD parameters ============================
316 AliPMD *PMD = new AliPMDv1("PMD","normal PMD");
317 PMD->SetPAR(1., 1., 0.8, 0.02);
318 PMD->SetIN(6., 18., -580., 27., 27.);
319 PMD->SetGEO(0.0, 0.2, 4.);
320 PMD->SetPadSize(0.8, 1.0, 1.0, 1.5);
325 //=================== START parameters ============================
326 AliSTART *START = new AliSTARTv1("START","START Detector");
329 } // end (!isSetInteractively)