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37c55dc0 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | //_________________________________________________________________________ | |
121a60bd | 17 | // This is a class that constructs ReconstParticles (reconstructed particles) |
37c55dc0 | 18 | // out of Digits |
19 | // | |
20 | //-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia | |
21 | ////////////////////////////////////////////////////////////////////////////// | |
22 | ||
dc8af42e | 23 | // --- ROOT system --- |
24 | #include "TTask.h" | |
25 | #include "TTree.h" | |
26 | #include "TSystem.h" | |
27 | #include "TFile.h" | |
37c55dc0 | 28 | #include "TROOT.h" |
29 | #include "TFolder.h" | |
46501dfb | 30 | #include "TH2F.h" |
37c55dc0 | 31 | |
dc8af42e | 32 | // --- Standard library --- |
37c55dc0 | 33 | #include <stdlib.h> |
88cb7938 | 34 | #include <Riostream.h> |
dc8af42e | 35 | |
36 | // --- AliRoot header files --- | |
37 | ||
88cb7938 | 38 | #include "AliRunLoader.h" |
39 | #include "AliLoader.h" | |
40 | ||
dc8af42e | 41 | #include "AliFMDdigit.h" |
1a42d4f2 | 42 | #include "AliFMDhit.h" |
dc8af42e | 43 | #include "AliFMDReconstParticles.h" |
44 | #include "AliFMD.h" | |
45 | #include "AliFMDv1.h" | |
121a60bd | 46 | #include "AliFMDReconstructor.h" |
dc8af42e | 47 | #include "AliRun.h" |
88cb7938 | 48 | #include "AliConfig.h" |
1a42d4f2 | 49 | #include "AliHeader.h" |
50 | #include "AliGenEventHeader.h" | |
88cb7938 | 51 | |
121a60bd | 52 | ClassImp(AliFMDReconstructor) |
dc8af42e | 53 | |
54 | ||
88cb7938 | 55 | //____________________________________________________________________________ |
dc8af42e | 56 | |
121a60bd | 57 | void AliFMDReconstructor::Reconstruct(AliRunLoader* runLoader) const |
dc8af42e | 58 | { |
88cb7938 | 59 | //Collects all digits in the same active volume into number of particles |
a39f3926 | 60 | /* |
88cb7938 | 61 | Reconstruct number of particles |
a39f3926 | 62 | in given group of pads for given FMDvolume |
63 | determine by numberOfVolume , | |
64 | numberOfMinSector,numberOfMaxSector, | |
65 | numberOfMinRing, numberOgMaxRing | |
121a60bd | 66 | Reconstructor method choose dependence on number of empty pads |
a39f3926 | 67 | */ |
68 | ||
69 | ||
3d44ce66 | 70 | #ifdef DEBUG |
71 | Info("Exec ","Start"); | |
72 | #endif | |
73 | ||
a39f3926 | 74 | Int_t const knumVolumes=5; |
46501dfb | 75 | Int_t padADC; |
1a42d4f2 | 76 | Float_t eta, etain,etaout,rad,theta; |
cb1df35e | 77 | Int_t ivol, iSector, iRing; |
1a42d4f2 | 78 | Float_t rin[5]={4.2,15.4,4.2,15.4,4.2}; |
79 | Float_t rout[5]={17.4,28.4,17.4,28.4,17.4}; | |
2ad713c4 | 80 | Float_t z[5]={-62.8, -75.2, 83.4, 75.2, 340.}; |
46501dfb | 81 | Int_t numberOfRings[5]={512,256,512,256,512}; |
a39f3926 | 82 | Int_t numberOfSectors[5]= {20,40,20,40,20}; |
83 | Int_t numberOfEtaIntervals[5]; | |
cb1df35e | 84 | // number of ring for boundary 0.1 eta |
cb1df35e | 85 | |
88cb7938 | 86 | |
121a60bd | 87 | if (runLoader == 0x0) |
88cb7938 | 88 | { |
89 | Error("Exec","Run Loader loader is NULL - Session not opened"); | |
90 | return; | |
91 | } | |
3d44ce66 | 92 | |
121a60bd | 93 | AliLoader* plFMD = runLoader->GetLoader("FMDLoader"); |
3d44ce66 | 94 | if (plFMD == 0x0) |
88cb7938 | 95 | { |
121a60bd | 96 | Fatal("AliFMDReconstructor","Can not find FMD (loader) in specified event"); |
88cb7938 | 97 | return;//never reached |
98 | } | |
99 | ||
121a60bd | 100 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); |
101 | if (!runLoader->TreeE()) runLoader->LoadHeader(); | |
3d44ce66 | 102 | |
46501dfb | 103 | TDirectory* cwd = gDirectory; |
104 | gDirectory = 0x0; | |
3d44ce66 | 105 | Text_t buf1[20]; |
46501dfb | 106 | TH2F* hTotal[10]; |
107 | for (Int_t j=1; j<=5; j++){ | |
108 | sprintf(buf1,"hTotal%d",j); | |
109 | ||
110 | hTotal[j] = new TH2F(buf1," Number of primary particles ", | |
111 | numberOfSectors[j-1],1,numberOfSectors[j-1], | |
112 | numberOfRings[j-1],1,numberOfRings[j-1]); | |
113 | } | |
114 | gDirectory = cwd; | |
115 | ||
121a60bd | 116 | plFMD->LoadRecPoints("RECREATE"); |
3d44ce66 | 117 | Int_t retval=0; |
121a60bd | 118 | Int_t nevents=Int_t (runLoader->TreeE()->GetEntries()); |
3d44ce66 | 119 | #ifdef DEBUG |
121a60bd | 120 | cout<<" nevents "<<nevents<<endl; |
3d44ce66 | 121 | #endif |
121a60bd | 122 | for(Int_t ievent=0;ievent<nevents;ievent++) |
dc8af42e | 123 | { |
3d44ce66 | 124 | #ifdef DEBUG |
125 | cout<<" *** event "<<ievent<<endl; | |
126 | #endif | |
121a60bd | 127 | runLoader->GetEvent(ievent) ; |
3d44ce66 | 128 | //event z-vertex for correction eta-rad dependence |
121a60bd | 129 | AliHeader *header = runLoader->GetHeader(); |
3d44ce66 | 130 | AliGenEventHeader* genHeader = header->GenEventHeader(); |
131 | TArrayF *o = new TArrayF(3); | |
132 | genHeader->PrimaryVertex(*o); | |
133 | Float_t zVertex=o->At(2); | |
88cb7938 | 134 | |
3d44ce66 | 135 | for (Int_t i=0; i<5; i++) |
46501dfb | 136 | hTotal[i+1]->Reset(); |
137 | ||
3d44ce66 | 138 | retval = plFMD->LoadDigits("READ"); |
46501dfb | 139 | if (retval) |
140 | { | |
141 | Error("Exec","Error occured while loading digits. Exiting."); | |
142 | return; | |
143 | } | |
144 | ||
3d44ce66 | 145 | AliFMD * fFMD = (AliFMD *)gAlice->GetDetector("FMD"); |
46501dfb | 146 | TClonesArray *fReconParticles=fFMD->ReconParticles(); |
147 | TClonesArray *fDigits=fFMD->Digits(); | |
1a42d4f2 | 148 | |
3d44ce66 | 149 | TTree* treeD = plFMD->TreeD(); |
46501dfb | 150 | if (treeD == 0x0) |
151 | { | |
152 | Error("Exec","Can not get Tree with Digits. Nothing to reconstruct - Exiting"); | |
153 | return; | |
154 | } | |
155 | ||
156 | TBranch *brDigits=0; | |
157 | ||
158 | brDigits=treeD->GetBranch("FMD"); | |
3d44ce66 | 159 | |
46501dfb | 160 | if (brDigits) { |
161 | brDigits->SetAddress(&fDigits); | |
46501dfb | 162 | }else{ |
163 | cerr<<"EXEC Branch FMD digits not found"<<endl; | |
164 | return; | |
165 | } | |
166 | ||
3d44ce66 | 167 | if(plFMD->TreeR()==0) plFMD->MakeTree("R"); |
88cb7938 | 168 | |
dc8af42e | 169 | //Make branches |
a39f3926 | 170 | fFMD->MakeBranch("R"); |
1a42d4f2 | 171 | |
37c55dc0 | 172 | |
46501dfb | 173 | Int_t zeroADC=6; |
3d44ce66 | 174 | // read Digits |
1a42d4f2 | 175 | AliFMDdigit *fmdDigit; |
a39f3926 | 176 | if (fFMD) |
dc8af42e | 177 | { |
3d44ce66 | 178 | plFMD->TreeD()->GetEvent(0); |
46501dfb | 179 | |
180 | Int_t nDigits=fDigits->GetEntries(); | |
46501dfb | 181 | Int_t recParticles[6]; |
182 | Int_t nRecPart=0 ; | |
3d44ce66 | 183 | Int_t zeroPads=0; |
184 | Int_t numberOfPads=0; | |
185 | Int_t pedestal; | |
186 | Float_t channelWidth=(22400*50)/1024; | |
187 | for (Int_t digit=0;digit<nDigits;digit++) | |
188 | { | |
189 | fmdDigit=(AliFMDdigit*)fDigits->UncheckedAt(digit); | |
190 | ivol=fmdDigit->Volume(); | |
191 | iSector=fmdDigit->NumberOfSector(); | |
192 | iRing=fmdDigit->NumberOfRing(); | |
193 | pedestal=Int_t(gRandom->Gaus(500,250)); | |
194 | padADC= fmdDigit->ADCsignal() | |
195 | -Int_t(Float_t(pedestal)/channelWidth); | |
196 | if (padADC<0) padADC=0; | |
46501dfb | 197 | hTotal[ivol]->Fill(iSector,iRing,padADC); |
3d44ce66 | 198 | } //digit loop |
199 | ||
200 | //reconstruct multiplicity in 0.1 eta according Poisson distribution | |
46501dfb | 201 | |
3d44ce66 | 202 | Int_t rmin=0; Int_t rmax=0; |
203 | Int_t smin=0; Int_t smax=0; | |
204 | for (ivol=0; ivol<knumVolumes; ivol++) | |
205 | { | |
206 | Float_t ring2number=Float_t (numberOfRings[ivol])/ | |
207 | (rout[ivol]-rin[ivol]); | |
208 | Float_t realZ=zVertex+z[ivol]; | |
209 | theta=TMath::ATan(rout[ivol]/TMath::Abs(realZ)); | |
210 | etain = - TMath::Log( TMath::Tan(theta/2.)); | |
211 | theta=TMath::ATan(rin[ivol]/TMath::Abs(realZ)); | |
212 | etaout=- TMath::Log( TMath::Tan(theta/2.)); | |
213 | numberOfEtaIntervals[ivol]=Int_t((etaout-etain)*10)-1; | |
214 | eta=etain; | |
215 | for (Int_t e1=0;e1<=numberOfEtaIntervals[ivol];e1++) | |
216 | { | |
217 | theta = 2.*TMath::ATan (TMath::Exp (-eta)); | |
218 | Float_t radmin = TMath::Abs(realZ) * (TMath::Tan (theta)); | |
219 | rmax= Int_t ( (radmin-rin[ivol])*ring2number+0.5); | |
220 | eta=eta+0.1; | |
221 | theta = 2.*TMath::ATan (TMath::Exp (-eta)); | |
222 | rad = TMath::Abs(realZ) * (TMath::Tan (theta)); | |
223 | rmin=Int_t( (rad-rin[ivol])*ring2number+0.5); | |
224 | ||
225 | zeroPads=0; | |
226 | smin=0; | |
227 | smax=numberOfSectors[ivol]; | |
228 | numberOfPads=(rmax-rmin)*(smax-smin); | |
229 | for (Int_t iring=rmin; iring<rmax; iring++) | |
230 | { | |
231 | for | |
232 | (Int_t isector=0; | |
233 | isector<numberOfSectors[ivol]; | |
234 | isector++) | |
235 | { | |
236 | if(hTotal[ivol+1]->GetBinContent(isector+1,iring+1) | |
237 | <zeroADC) zeroPads++;} | |
238 | ||
239 | } //ring | |
240 | Float_t numberOfPads=Float_t(smax-smin)*Float_t(rmax-rmin); | |
241 | ||
242 | Double_t lambda=-TMath::Log(Double_t(zeroPads)/numberOfPads); | |
243 | Int_t fRecon=Int_t (lambda*numberOfPads+0.5); | |
244 | recParticles[0]=ivol+1; | |
245 | recParticles[1]=smin; | |
246 | recParticles[2]=smax; | |
247 | recParticles[3]=rmin; | |
248 | recParticles[4]=rmax; | |
249 | recParticles[5]= fRecon; | |
250 | new((*fReconParticles)[nRecPart++]) AliFMDReconstParticles(recParticles); | |
251 | ||
46501dfb | 252 | |
1a42d4f2 | 253 | } // eta |
254 | } // volume | |
cb1df35e | 255 | |
cb1df35e | 256 | }//if FMD |
3d44ce66 | 257 | plFMD->TreeR()->Reset(); |
258 | plFMD->TreeR()->Fill(); | |
259 | plFMD->WriteRecPoints("OVERWRITE"); | |
260 | plFMD->UnloadDigits(); | |
dc8af42e | 261 | } //event loop |
121a60bd | 262 | plFMD->UnloadRecPoints(); |
3d44ce66 | 263 | #ifdef DEBUG |
264 | Info(" Exec"," finished"); | |
265 | #endif | |
266 | // delete hTotal[10]; | |
267 | ||
88cb7938 | 268 | } |
dc8af42e | 269 | |
121a60bd | 270 | |
271 | //_____________________________________________________________________________ | |
272 | void AliFMDReconstructor::FillESD(AliRunLoader* /*runLoader*/, | |
273 | AliESD* /*esd*/) const | |
274 | { | |
275 | // nothing to be done | |
276 | ||
277 | } | |
278 |