FMD/analysis/AliFMDAnalysisTaskGenerateBackground.cxx

   1 #include "AliFMDAnalysisTaskGenerateBackground.h"
   2 #include "AliESDEvent.h"
   3 #include "iostream"
   4 #include "AliESDFMD.h"
   5 #include "TH2F.h"
   6 #include "AliTrackReference.h"
   7 #include "AliStack.h"
   8 #include "AliFMDAnaParameters.h"
   9 #include "AliFMDStripIndex.h"
  10 #include "AliStack.h"
  11 #include "AliMCParticle.h"
  12 #include "AliMCEvent.h"
  13 #include "AliFMDGeometry.h"
  14 #include "TArray.h"
  15 #include "AliGenEventHeader.h"
  16 #include "AliHeader.h"
  17 #include "AliFMDAnaCalibBackgroundCorrection.h"
  18 #include "AliCDBManager.h"
  19 #include "AliCDBId.h"
  20 #include "AliCDBMetaData.h"
  21 #include "TSystem.h"
  22 #include "TROOT.h"
  23 #include "TAxis.h"
  24 ClassImp(AliFMDAnalysisTaskGenerateBackground)
  25
  26 //_____________________________________________________________________
  27 AliFMDAnalysisTaskGenerateBackground::AliFMDAnalysisTaskGenerateBackground():
  28 AliAnalysisTaskSE()
  29 {
  30   // Default constructor
  31 }
  32 //_____________________________________________________________________
  33 AliFMDAnalysisTaskGenerateBackground::AliFMDAnalysisTaskGenerateBackground(const char* name):
  34   AliAnalysisTaskSE(name),
  35   fZvtxCut(10),
  36   fNvtxBins(10),
  37   fNbinsEta(100)
  38 {
  39
  40   DefineOutput(1, TList::Class());
  41   DefineOutput(2, TList::Class());
  42   DefineOutput(3, TH1F::Class());
  43   DefineOutput(4, TList::Class());
  44 }
  45 //_____________________________________________________________________
  46 void AliFMDAnalysisTaskGenerateBackground::UserCreateOutputObjects()
  47 {
  48 // Create the output containers
  49 //
  50
  51   std::cout<<"Creating output objects"<<std::endl;
  52   for(Int_t iring = 0; iring<2;iring++) {
  53     Char_t ringChar = (iring == 0 ? 'I' : 'O');
  54     Int_t nSec = (iring == 1 ? 40 : 20);
  55     for(Int_t v=0; v<fNvtxBins;v++) {
  56
  57       TH2F* hPrimary       = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
  58                                       Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
  59                                       fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
  60       hPrimary->Sumw2();
  61       fListOfPrimaries.Add(hPrimary);
  62     }
  63   }
  64
  65
  66   for(Int_t det =1; det<=3;det++) {
  67     Int_t nRings = (det==1 ? 1 : 2);
  68     for(Int_t ring = 0;ring<nRings;ring++) {
  69       Int_t nSec = (ring == 1 ? 40 : 20);
  70       Char_t ringChar = (ring == 0 ? 'I' : 'O');
  71       for(Int_t v=0; v<fNvtxBins;v++) {
  72         TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
  73                                Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
  74                                fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
  75         hHits->Sumw2();
  76         fListOfHits.Add(hHits);
  77
  78       }
  79     }
  80   }
  81   TH1F* doubleHits = new TH1F("DoubleHits",  "DoubleHits",
  82                          fNbinsEta, -6,6);
  83   TH1F* allHits = new TH1F("allHits",  "allHits",
  84                          fNbinsEta, -6,6);
  85   fVertexBins.SetName("VertexBins");
  86   fVertexBins.GetXaxis()->Set(fNvtxBins,-1*fZvtxCut,fZvtxCut);
  87   fListOfHits.Add(allHits);
  88   fListOfHits.Add(doubleHits);
  89 }
  90 //_____________________________________________________________________
  91 void AliFMDAnalysisTaskGenerateBackground::Init()
  92 {
  93   std::cout<<"Init"<<std::endl;
  94
  95
  96   fLastTrackByStrip.Reset(-1);
  97
  98
  99 }
 100 //_____________________________________________________________________
 101 void AliFMDAnalysisTaskGenerateBackground::UserExec(Option_t */*option*/)
 102 {
 103
 104   fLastTrackByStrip.Reset(-1);
 105   fHitsByStrip.Reset(0);
 106   AliMCEvent* mcevent = MCEvent();
 107   AliFMDAnaParameters* pars = AliFMDAnaParameters::Instance();
 108
 109   AliMCParticle* particle = 0;
 110   AliStack* stack = mcevent->Stack();
 111
 112   UShort_t det,sec,strip;
 113   Char_t   ring;
 114
 115   Int_t nTracks = mcevent->GetNumberOfTracks();
 116   AliHeader* header            = mcevent->Header();
 117   AliGenEventHeader* genHeader = header->GenEventHeader();
 118
 119   TArrayF vertex;
 120   genHeader->PrimaryVertex(vertex);
 121
 122   if(TMath::Abs(vertex.At(2)) > fZvtxCut)
 123     return;
 124   for(Int_t i = 0 ;i<nTracks;i++) {
 125     particle = mcevent->GetTrack(i);
 126
 127     if(!particle)
 128       continue;
 129
 130     Double_t delta           = 2*fZvtxCut/fNvtxBins;
 131     Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
 132     Int_t    vertexBin       = (Int_t)vertexBinDouble;
 133
 134     if(stack->IsPhysicalPrimary(i) && particle->Charge() != 0) {
 135
 136
 137       TH2F* hPrimaryInner = (TH2F*)fListOfPrimaries.FindObject( Form("hPrimary_FMD_%c_vtx%d",'I',vertexBin));
 138       TH2F* hPrimaryOuter = (TH2F*)fListOfPrimaries.FindObject( Form("hPrimary_FMD_%c_vtx%d",'O',vertexBin));
 139       hPrimaryInner->Fill(particle->Eta(),particle->Phi());
 140       hPrimaryOuter->Fill(particle->Eta(),particle->Phi());
 141     }
 142
 143     for(Int_t j=0; j<particle->GetNumberOfTrackReferences();j++) {
 144
 145       AliTrackReference* ref = particle->GetTrackReference(j);
 146
 147       if(ref->DetectorId() != AliTrackReference::kFMD)
 148         continue;
 149       AliFMDStripIndex::Unpack(ref->UserId(),det,ring,sec,strip);
 150       Float_t thisStripTrack = fLastTrackByStrip.operator()(det,ring,sec,strip);
 151       if(particle->Charge() != 0 && i != thisStripTrack ) {
 152         Double_t x,y,z;
 153         AliFMDGeometry* fmdgeo = AliFMDGeometry::Instance();
 154         fmdgeo->Detector2XYZ(det,ring,sec,strip,x,y,z);
 155
 156         Float_t   phi   = TMath::ATan2(y,x);
 157         if(phi<0) phi   = phi+2*TMath::Pi();
 158         Float_t   r     = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
 159         Float_t   theta = TMath::ATan2(r,z-vertex.At(2));
 160         Float_t   eta   = -1*TMath::Log(TMath::Tan(0.5*theta));
 161         TH2F* hHits = (TH2F*)fListOfHits.FindObject(Form("hHits_FMD%d%c_vtx%d", det,ring,vertexBin));
 162         hHits->Fill(eta,phi);
 163         Float_t nstrips = (ring =='O' ? 256 : 512);
 164         fHitsByStrip.operator()(det,ring,sec,strip) +=1;
 165         TH1F* allHits = (TH1F*)fListOfHits.FindObject("allHits");
 166         TH1F* doubleHits = (TH1F*)fListOfHits.FindObject("DoubleHits");
 167
 168         if(fHitsByStrip.operator()(det,ring,sec,strip) == 1)
 169           allHits->Fill(eta);
 170
 171         doubleHits->Fill(eta);
 172         /*if(fHitsByStrip.operator()(det,ring,sec,strip) == 2){
 173           TH1F* doubleHits = (TH1F*)fListOfHits.FindObject("DoubleHits");
 174           doubleHits->Fill(eta,2);
 175           }*/
 176         //if(fHitsByStrip.operator()(det,ring,sec,strip) > 1){
 177         //  doubleHits->Fill(eta);
 178         //      }
 179
 180
 181         fLastTrackByStrip.operator()(det,ring,sec,strip) = (Float_t)i;
 182         if(strip >0)
 183           fLastTrackByStrip.operator()(det,ring,sec,strip-1) = (Float_t)i;
 184         if(strip < (nstrips - 1))
 185           fLastTrackByStrip.operator()(det,ring,sec,strip+1) = (Float_t)i;
 186       }
 187     }
 188
 189   }
 190
 191
 192   PostData(1, &fListOfHits);
 193   PostData(2, &fListOfPrimaries);
 194   PostData(3, &fVertexBins);
 195 }
 196 //_____________________________________________________________________
 197 void AliFMDAnalysisTaskGenerateBackground::Terminate(Option_t */*option*/)
 198 {
 199   TH1F* allHits = (TH1F*)fListOfHits.FindObject("allHits");
 200   TH1F* doubleHits = (TH1F*)fListOfHits.FindObject("DoubleHits");
 201
 202   doubleHits->Divide(allHits);
 203   GenerateCorrection();
 204   PostData(1, &fListOfHits);
 205   PostData(4, &fListOfCorrection);
 206
 207 }
 208 //_____________________________________________________________________
 209 void AliFMDAnalysisTaskGenerateBackground::GenerateCorrection() {
 210
 211   fBackground = new AliFMDAnaCalibBackgroundCorrection();
 212
 213   for(Int_t det= 1; det <=3; det++) {
 214     Int_t nRings = (det==1 ? 1 : 2);
 215
 216     for(Int_t iring = 0; iring<nRings; iring++) {
 217       Char_t ring = (iring == 0 ? 'I' : 'O');
 218       for(Int_t vertexBin=0;vertexBin<fNvtxBins  ;vertexBin++) {
 219         TH2F* hHits          = (TH2F*)fListOfHits.FindObject(Form("hHits_FMD%d%c_vtx%d", det,ring,vertexBin));
 220         TH2F* hPrimary  = (TH2F*)fListOfPrimaries.FindObject( Form("hPrimary_FMD_%c_vtx%d",ring,vertexBin));
 221         TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ring,vertexBin));
 222         hCorrection->Divide(hPrimary);
 223         hCorrection->SetTitle(hCorrection->GetName());
 224         fListOfCorrection.Add(hCorrection);
 225         fBackground->SetBgCorrection(det,ring,vertexBin,hCorrection);
 226       }
 227
 228     }
 229   }
 230   TAxis refAxis(fNvtxBins,-1*fZvtxCut,fZvtxCut);
 231   fBackground->SetRefAxis(&refAxis);
 232
 233 }
 234 //_____________________________________________________________________
 235 void AliFMDAnalysisTaskGenerateBackground::ReadFromFile(const Char_t* filename, Bool_t storeInOCDB, Int_t runNo) {
 236
 237   TFile infile(filename);
 238   TH1F* hVertex = (TH1F*)infile.Get("VertexBins");
 239   fZvtxCut = hVertex->GetXaxis()->GetXmax();
 240   fNvtxBins = hVertex->GetXaxis()->GetNbins();
 241   fVertexBins.SetName("VertexBins");
 242   fVertexBins.GetXaxis()->Set(fNvtxBins,-1*fZvtxCut,fZvtxCut);
 243
 244   TList* listOfHits = (TList*)infile.Get("Hits");
 245   TList* listOfPrim = (TList*)infile.Get("Primaries");
 246
 247   for(Int_t det =1; det<=3;det++)
 248       {
 249         Int_t nRings = (det==1 ? 1 : 2);
 250         for(Int_t ring = 0;ring<nRings;ring++)
 251           {
 252             Char_t ringChar = (ring == 0 ? 'I' : 'O');
 253             for(Int_t v=0; v<fNvtxBins;v++)
 254               {
 255
 256                 TH2F* hHits          = (TH2F*)listOfHits->FindObject(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v));
 257                 fListOfHits.Add(hHits);
 258               }
 259           }
 260       }
 261   for(Int_t iring = 0; iring<2;iring++) {
 262     Char_t ringChar = (iring == 0 ? 'I' : 'O');
 263     for(Int_t v=0; v<fNvtxBins;v++) {
 264
 265       TH2F* hPrimary       = (TH2F*)listOfPrim->FindObject( Form("hPrimary_FMD_%c_vtx%d",ringChar,v));
 266       fListOfPrimaries.Add(hPrimary);
 267
 268     }
 269   }
 270   GenerateCorrection();
 271
 272   TFile fout("backgroundFromFile.root","recreate");
 273   fListOfHits.Write();
 274   fListOfPrimaries.Write();
 275   fListOfCorrection.Write();
 276   fVertexBins.Write();
 277   fout.Close();
 278
 279   if(storeInOCDB) {
 280     AliCDBManager* cdb = AliCDBManager::Instance();
 281     cdb->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
 282     AliCDBId      id(AliFMDAnaParameters::GetBackgroundPath(),runNo,999999999);
 283
 284     AliCDBMetaData* meta = new AliCDBMetaData;
 285     meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());
 286     meta->SetAliRootVersion(gROOT->GetVersion());
 287     meta->SetBeamPeriod(1);
 288     meta->SetComment("Background Correction for FMD");
 289     meta->SetProperty("key1", fBackground );
 290     cdb->Put(fBackground, id, meta);
 291
 292   }
 293
 294 }
 295 //_____________________________________________________________________
 296 //
 297 // EOF
 298 //