1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 Revision 1.13 2000/12/21 16:24:06 morsch
19 Coding convention clean-up
21 Revision 1.12 2000/11/30 07:12:50 alibrary
22 Introducing new Rndm and QA classes
24 Revision 1.11 2000/06/14 15:20:40 morsch
27 Revision 1.10 2000/06/09 20:31:34 morsch
28 All coding rule violations except RS3 corrected
30 Revision 1.9 2000/03/07 13:52:54 morsch
33 Revision 1.8 2000/02/14 14:49:38 morsch
34 Correct particle type for gamma and neutrons
35 More consistent calculation of momentum from kin. energy and mass
37 Revision 1.7 1999/11/03 17:43:20 fca
38 New version from G.Martinez & A.Morsch
40 Revision 1.6 1999/09/29 09:24:12 fca
41 Introduction of the Copyright and cvs Log
47 // Read background particles from a FLUKA boundary source file
48 // This is a very special generator that works for background studies for the muon-spectrometer.
49 // The input files come from FLUKA simulations.
50 // Files can be chained.
51 // Author: andreas.morsch@cern.ch
53 #include "AliGenFLUKAsource.h"
63 ClassImp(AliGenFLUKAsource)
64 AliGenFLUKAsource::AliGenFLUKAsource()
69 fTitle="FLUKA Boundary Source";
70 // Read in all particle types by default
72 // Set maximum admitted age of particles to 1.e-05 by default
76 // Shift the z-coordinate of the impact point by 4.5 cm only if it reads
77 // from specific boundary source to the chamber (fZshift=4.5;),else there
78 // is no need to shift as it reads boundary source for the whole volume of
79 // the Muon Arm; the default value corresponds to boundary source for the
80 // whole volume of the MUON Arm
82 // Set the default file
86 fTreeChain = new TChain("h1");
92 AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
97 fTitle = "FLUKA Boundary Source";
98 // Read in all particle types by default
100 // Set maximum admitted age of particles to 1.e-05 by default
104 // Shift the z-coordinate of the impact point by 4.5 cm only if it reads
105 // from specific boundary source to the chamber (fZshift=4.5;),else there
106 // is no need to shift as it reads boundary source for the whole volume of
107 // the Muon Arm; the default value corresponds to boundary source for the
108 // whole volume of the MUON Arm
110 // Set the default file
114 fTreeChain = new TChain("h1");
118 AliGenFLUKAsource::AliGenFLUKAsource(const AliGenFLUKAsource & FLUKAsource)
124 //____________________________________________________________
125 AliGenFLUKAsource::~AliGenFLUKAsource()
128 if (fTreeFluka) delete fTreeFluka;
129 if (fTreeChain) delete fTreeChain;
132 void AliGenFLUKAsource::AddFile(const Text_t *filename)
134 // Add a file to the chain
135 fTreeChain->Add(filename);
140 //____________________________________________________________
141 void AliGenFLUKAsource::FlukaInit()
143 // Set branch addresses of data entries
144 TChain *h2=fTreeChain;
145 //Set branch addresses
146 h2->SetBranchAddress("Ip",&fIp);
147 h2->SetBranchAddress("Ipp",&fIpp);
148 h2->SetBranchAddress("Xi",&fXi);
149 h2->SetBranchAddress("Yi",&fYi);
150 h2->SetBranchAddress("Zi",&fZi);
151 h2->SetBranchAddress("Px",&fPx);
152 h2->SetBranchAddress("Py",&fPy);
153 h2->SetBranchAddress("Pz",&fPz);
154 h2->SetBranchAddress("Ekin",&fEkin);
155 h2->SetBranchAddress("Zv",&fZv);
156 h2->SetBranchAddress("Rv",&fRv);
157 h2->SetBranchAddress("Itra",&fItra);
158 h2->SetBranchAddress("Igas",&fIgas);
159 h2->SetBranchAddress("Wgt",&fWgt);
160 h2->SetBranchAddress("Etag",&fEtag);
161 h2->SetBranchAddress("Ptg",&fPtg);
162 h2->SetBranchAddress("Age",&fAge);
165 //____________________________________________________________
166 void AliGenFLUKAsource::Generate()
168 // Generate one event
169 AliMC* gMC = AliMC::GetMC();
171 const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
172 kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
173 kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
174 kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
175 kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
177 Float_t polar[3]= {0,0,0};
185 Float_t amass, charge, tlife;
188 Int_t i, j, part, nt;
194 TChain *h2=fTreeChain;
195 Int_t nentries = (Int_t) h2->GetEntries();
196 if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
199 // loop over number of particles
201 Int_t ev=gMC->CurrentEvent();
202 for (i=0; i<fNpart;i++) {
203 Int_t entry=fNpart*(ev-1)+i;
204 nb = (Int_t)h2->GetEvent(entry);
205 if (irwn > nentries) {
206 printf("No more entries in the FLUKA boundary source file\n");
208 // Get AliRun object or create it
210 gAlice = (AliRun*)pFile->Get("gAlice");
211 if (gAlice) printf("AliRun object found on file\n");
212 if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
214 TTree *fAli=gAlice->TreeK();
215 if (fAli) pFile =fAli->GetCurrentFile();
217 printf("Generate - I'm out \n");
221 Int_t ifip = Int_t(fIp);
224 if (fSourceId != -1 && fIgas !=fSourceId) {
229 if (ifip > 28 || ifip < 0) {
234 if ((ifip != fIkine && fIkine != kAll && fIkine != kCharged
235 && fIkine != 10) || fAge > fAgeMax){
238 } else if (fIkine == kCharged) {
239 if (ifip == 7 || ifip == 8 || fAge > fAgeMax) {
243 } else if (fIkine == kNoNeutron) {
244 if (ifip == 8 || fAge > fAgeMax) {
253 // PDG code from FLUKA particle type (ifip)
254 part=kIfluge[int(ifip)-1];
256 // Calculate momentum from kinetic energy and mass of the particle
257 gMC->Gfpart(part, name, itrtyp,
258 amass, charge, tlife);
259 prwn=fEkin*sqrt(1. + 2.*amass/fEkin);
270 //handle particle weight correctly
271 wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
273 fwgt=wgt-Float_t(iwgt);
275 if (random[0] < fwgt) iwgt++;
276 if (part==1 && iwgt>100) iwgt=100;
278 for (j=0; j<iwgt; j++) {
279 gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,kPPrimary,nt);
281 phi=2*random[1]*TMath::Pi();
282 Float_t pn1=p[0]*TMath::Sin(phi) - p[1]*TMath::Cos(phi);
283 Float_t pn2=p[0]*TMath::Cos(phi) + p[1]*TMath::Sin(phi);
286 Float_t on1=origin[0]*TMath::Sin(phi)-origin[1]*TMath::Cos(phi);
287 Float_t on2=origin[0]*TMath::Cos(phi)+origin[1]*TMath::Sin(phi);
292 if (nstack == 0) continue;
296 // Get AliRun object or create it
298 gAlice = (AliRun*)pFile->Get("gAlice");
299 if (gAlice) printf("AliRun object found on file\n");
300 if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
302 TTree *fAli=gAlice->TreeK();
303 if (fAli) pFile =fAli->GetCurrentFile();
308 AliGenFLUKAsource& AliGenFLUKAsource::operator=(const AliGenFLUKAsource& rhs)
310 // Assignment operator