[u/mrichter/AliRoot.git] / FMD / AliFMDBackgroundCorrection.cxx

/**************************************************************************
 * Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

// Thil class computes background corrections for the FMD. The correction is computed 
// in eta,phi cells and the objects stored can be put into alien to use with analysis.
// It is based on the AliFMDInput class that is used to loop over hits and primaries.
//
// Author: Hans Hjersing Dalsgaard, NBI, hans.dalsgaard@cern.ch
//
//

#include "AliSimulation.h"
#include "TStopwatch.h"
#include "iostream"
#include "TGrid.h"
#include "AliRunLoader.h"
#include "AliGeomManager.h"
#include "AliFMDGeometry.h"
#include "AliStack.h"
#include "TParticle.h"
#include "TDatabasePDG.h"
#include "TParticlePDG.h"
#include "AliRun.h"
#include "AliFMDBackgroundCorrection.h"
#include "TSystem.h"
#include "AliCDBManager.h"
#include "TTree.h"
#include "TClonesArray.h"
#include "TBranch.h"
#include "AliFMDHit.h"
#include "AliLoader.h" 
#include "AliFMD.h"
#include "TH2F.h"
#include "AliGenEventHeader.h"
#include "AliHeader.h"
#include "TFile.h"
#include "TAxis.h"
#include "AliCDBId.h"
#include "AliCDBMetaData.h"
#include "TROOT.h"
#include "AliFMDParameters.h"
#include "AliLog.h"
#include "TList.h"
#include "AliFMDAnaParameters.h"
#include "AliFMDAnaCalibBackgroundCorrection.h"
#include "AliTrackReference.h"
#include "AliFMDStripIndex.h"

ClassImp(AliFMDBackgroundCorrection)
//_____________________________________________________________________
AliFMDBackgroundCorrection::AliFMDBackgroundCorrection() : 
  TNamed(),
  fCorrectionArray(),
  fPrimaryList()
{} 

//_____________________________________________________________________
AliFMDBackgroundCorrection::AliFMDInputBG::AliFMDInputBG(Bool_t hits_not_trackref) : 
  AliFMDInput(),
  fPrimaryArray(),
  fHitArray(),
  fPrim(0),
  fHits(0),
  fZvtxCut(0),
  fNvtxBins(0),
  fPrevTrack(-1),
  fPrevDetector(-1),
  fPrevRing('Q'),
  fNbinsEta(100)
{
  AddLoad(kTracks); 
  if(hits_not_trackref)
    AddLoad(kHits);
  else
    AddLoad(kTrackRefs);
  AddLoad(kKinematics); 
  AddLoad(kHeader);
}

//_____________________________________________________________________

void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(Bool_t from_hits,
							      const Int_t nvtxbins,
							      Float_t zvtxcut, 
							      const Int_t nBinsEta, 
							      Bool_t storeInAlien, 
							      Int_t runNo,
							      Int_t endRunNo, 
							      const Char_t* filename, 
							      Bool_t simulate,
							      Int_t nEvents,
							      Bool_t inFile,
							      const Char_t* infilename) {
  
  //TGrid::Connect("alien:",0,0,"t");
  if(simulate)
    Simulate(nEvents);
  else {
    //AliCDBManager::Instance()->SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
    AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT");
    AliCDBManager::Instance()->SetRun(runNo);
    
#if defined(__CINT__)
    gSystem->Load("liblhapdf");
    gSystem->Load("libEGPythia6");
    gSystem->Load("libpythia6");
    gSystem->Load("libAliPythia6");
    gSystem->Load("libgeant321");
#endif
      // 
  }  
  
  //Setting up the geometry
  //-----------------------------------------------
  if (AliGeomManager::GetGeometry() == NULL)
    AliGeomManager::LoadGeometry();
  
  AliFMDGeometry* geo = AliFMDGeometry::Instance();
  geo->Init();
  geo->InitTransformations();
    
  AliInfo("Processing hits and primaries ");
  
  AliFMDInputBG input(from_hits);
  
  if(!inFile) {
  
    input.SetVtxCutZ(zvtxcut);
    input.SetNvtxBins(nvtxbins);
    input.SetNbinsEta(nBinsEta);
    input.Run();
  }
  
  AliInfo(Form("Found %d primaries and %d hits.", input.GetNprim(),input.GetNhits()));
  TObjArray* hitArray ;
  TObjArray* primaryArray;
  if(inFile) {
    TFile* infile = TFile::Open(infilename);
    hitArray     = new TObjArray();
    primaryArray = new TObjArray();
    
    for(Int_t det =1; det<=3;det++)
      {
	TObjArray* detArrayHits = new TObjArray();
	detArrayHits->SetName(Form("FMD%d",det));
	hitArray->AddAtAndExpand(detArrayHits,det);
	Int_t nRings = (det==1 ? 1 : 2);
	for(Int_t ring = 0;ring<nRings;ring++)
	  {
	    
	    Char_t ringChar = (ring == 0 ? 'I' : 'O');
	    TObjArray* vtxArrayHits = new TObjArray();
	    vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	    detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	    for(Int_t v=0; v<nvtxbins;v++)
	      {
	      
		TH2F* hHits          = (TH2F*)infile->Get(Form("hHits_FMD%d%c_vtx%d",det,ringChar,v));
		
		
	      vtxArrayHits->AddAtAndExpand(hHits,v);
	      	      
	    } 
	}
      
    }
    
    for(Int_t iring = 0; iring<2;iring++) {
      Char_t ringChar = (iring == 0 ? 'I' : 'O');
      TObjArray* ringArray = new TObjArray();
      ringArray->SetName(Form("FMD_%c",ringChar));
      primaryArray->AddAtAndExpand(ringArray,iring);
      for(Int_t v=0; v<nvtxbins;v++) {
	
	TH2F* hPrimary       = (TH2F*)infile->Get(Form("hPrimary_FMD_%c_vtx%d",ringChar,v));
	ringArray->AddAtAndExpand(hPrimary,v);
      }
    }
    
    
  }
  else {
    hitArray     = input.GetHits();
    primaryArray = input.GetPrimaries();
  }
  fCorrectionArray.SetName("FMD_bg_correction");
  fCorrectionArray.SetOwner();
   
  TList* primaryList     = new TList();
  primaryList->SetName("primaries");
  
  TList* hitList     = new TList();
  hitList->SetName("hits");
  TList* corrList    = new TList();
  corrList->SetName("corrections");
  
  AliFMDAnaCalibBackgroundCorrection* background = new AliFMDAnaCalibBackgroundCorrection();
  
  for(Int_t det= 1; det <=3; det++) {
    Int_t nRings = (det==1 ? 1 : 2);
    
    TObjArray* detArrayCorrection = new TObjArray();
    detArrayCorrection->SetName(Form("FMD%d",det));
    fCorrectionArray.AddAtAndExpand(detArrayCorrection,det);
    
    
    for(Int_t iring = 0; iring<nRings; iring++) {
      TObjArray* primRingArray = (TObjArray*)primaryArray->At(iring);
      Char_t ringChar = (iring == 0 ? 'I' : 'O');
      TObjArray* vtxArrayCorrection = new TObjArray();
      vtxArrayCorrection->SetName(Form("FMD%d%c",det,ringChar));
      detArrayCorrection->AddAtAndExpand(vtxArrayCorrection,iring);
      
      for(Int_t vertexBin=0;vertexBin<nvtxbins;vertexBin++) {
	TObjArray* detArray  = (TObjArray*)hitArray->At(det);
	TObjArray* vtxArray  = (TObjArray*)detArray->At(iring);
	TH2F* hHits          = (TH2F*)vtxArray->At(vertexBin);
	hitList->Add(hHits);
	TH2F* hPrimary  = (TH2F*)primRingArray->At(vertexBin);
	primaryList->Add(hPrimary);
	TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ringChar,vertexBin));
	hCorrection->Divide(hPrimary);
	corrList->Add(hCorrection);
	hCorrection->SetTitle(hCorrection->GetName());
	vtxArrayCorrection->AddAtAndExpand(hCorrection,vertexBin);
	background->SetBgCorrection(det,ringChar,vertexBin,hCorrection);
      }
      
    }
  }
  
  TAxis refAxis(nvtxbins,-1*zvtxcut,zvtxcut);
  if(inFile) {
    TFile* infile = TFile::Open(infilename);
    TAxis* refaxis = (TAxis*)infile->Get("vertexbins");
    background->SetRefAxis(refaxis);
      
  }
  else background->SetRefAxis(&refAxis);
  
  TFile*  fout = new TFile(filename,"RECREATE");
  refAxis.Write("vertexbins");
  
  hitList->Write();
  primaryList->Write();
  corrList->Write();
   
  TObjArray* container = new TObjArray();
  container->SetOwner();
  container->AddAtAndExpand(&refAxis,0);
  container->AddAtAndExpand(&fCorrectionArray,1);
  container->AddAtAndExpand(hitArray,2);
  container->AddAtAndExpand(primaryArray,3);
  
  
  if(storeInAlien) {
    AliCDBManager* cdb = AliCDBManager::Instance();
    cdb->SetDefaultStorage("local://$ALICE_ROOT");
    AliCDBId      id(AliFMDAnaParameters::GetBackgroundPath(),runNo,endRunNo);
    
    AliCDBMetaData* meta = new AliCDBMetaData;				
    meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());	
    meta->SetAliRootVersion(gROOT->GetVersion());			
    meta->SetBeamPeriod(1);						
    meta->SetComment("Background Correction for FMD");
    meta->SetProperty("key1", background );
    cdb->Put(background, id, meta);
    
  }
  
  fout->Close();
 
  
  }

//_____________________________________________________________________
void AliFMDBackgroundCorrection::Simulate(Int_t nEvents) {
  
  AliSimulation sim ; 
  sim.SetRunNumber(0);
  TGrid::Connect("alien:",0,0,"t");
  sim.SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
  sim.SetConfigFile("Config.C");
  sim.SetRunQA("FMD:");
  TStopwatch timer;
  timer.Start();
  sim.RunSimulation(nEvents);    
  timer.Stop();
  timer.Print();
  
}

//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessHit(AliFMDHit* h, 
						      TParticle* /*p*/) 
{
  
  if(!h)
    return kTRUE;
  Bool_t retval = ProcessEvent(h->Detector(),
			       h->Ring(),
			       h->Sector()
			       ,h->Strip(),
			       h->Track(),
			       h->Q());
  
  return retval;
}
//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessTrackRef(AliTrackReference* tr, 
							   TParticle* p) 
{
  if(!tr)
    return kTRUE;
  UShort_t det,sec,strip;
  Char_t   ring;
  AliFMDStripIndex::Unpack(tr->UserId(),det,ring,sec,strip);
  Int_t         nTrack  = tr->GetTrack();
  TDatabasePDG* pdgDB   = TDatabasePDG::Instance();
  TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
  Float_t       charge  = (pdgPart ? pdgPart->Charge() : 0);
  Bool_t        retval  = ProcessEvent(det,ring,sec,strip,nTrack,charge);
  return retval;
  
}
//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessEvent(UShort_t det,
							Char_t   ring, 
							UShort_t sec, 
							UShort_t strip,
							Int_t    nTrack,
							Float_t  charge)
{
  
  AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
  TArrayF vertex;
  genHeader->PrimaryVertex(vertex);
  
  if(TMath::Abs(vertex.At(2)) > fZvtxCut) 
    return kTRUE;
  
  Double_t delta           = 2 * fZvtxCut / fNvtxBins;
  Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
  Int_t    vertexBin       = Int_t(vertexBinDouble);
  
  if(charge !=  0 && 
     (nTrack != fPrevTrack || 
      det != fPrevDetector || 
      ring != fPrevRing)) {
    Double_t x,y,z;
    AliFMDGeometry* fmdgeo = AliFMDGeometry::Instance();
    fmdgeo->Detector2XYZ(det,ring,sec,strip,x,y,z);
    
    Int_t iring = (ring == 'I' ? 0 : 1);
    
    TObjArray* detArray  = (TObjArray*)fHitArray.At(det);
    TObjArray* vtxArray  = (TObjArray*)detArray->At(iring);
    TH2F* hHits          = (TH2F*)vtxArray->At(vertexBin);
    
    Float_t   phi   = TMath::ATan2(y,x);
    if(phi<0) phi   = phi+2*TMath::Pi();
    Float_t   r     = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
    Float_t   theta = TMath::ATan2(r,z+vertex.At(2));
    Float_t   eta   = -1*TMath::Log(TMath::Tan(0.5*theta));
    hHits->Fill(eta,phi);
    fHits++;
    fPrevDetector = det;
    fPrevRing     = ring;
  }
  
  fPrevTrack = nTrack;
  return kTRUE;

}

//_____________________________________________________________________
Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Init() 
{
  fPrimaryArray.SetOwner();
  fPrimaryArray.SetName("FMD_primary");
  
  for(Int_t iring = 0; iring<2;iring++) {
    Char_t ringChar = (iring == 0 ? 'I' : 'O');
    TObjArray* ringArray = new TObjArray();
    ringArray->SetName(Form("FMD_%c",ringChar));
    fPrimaryArray.AddAtAndExpand(ringArray,iring);
    Int_t nSec = (iring == 1 ? 40 : 20);
    for(Int_t v=0; v<fNvtxBins;v++) {

      TH2F* hPrimary       = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
				      Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
				      fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
      hPrimary->Sumw2();
      ringArray->AddAtAndExpand(hPrimary,v);
    }
  }
  
  
  fHitArray.SetOwner();
  fHitArray.SetName("FMD_hits");
   
  for(Int_t det =1; det<=3;det++) {
    TObjArray* detArrayHits = new TObjArray();
    detArrayHits->SetName(Form("FMD%d",det));
    fHitArray.AddAtAndExpand(detArrayHits,det);
    Int_t nRings = (det==1 ? 1 : 2);
    for(Int_t ring = 0;ring<nRings;ring++) {
      Int_t nSec = (ring == 1 ? 40 : 20);
      Char_t ringChar = (ring == 0 ? 'I' : 'O');
      TObjArray* vtxArrayHits = new TObjArray();
      vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
      detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
      for(Int_t v=0; v<fNvtxBins;v++) {
	TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
			       Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
			       fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
	hHits->Sumw2();
	vtxArrayHits->AddAtAndExpand(hHits,v);
	
      } 
    }
  }

  AliFMDInput::Init();
  
  return kTRUE;
}
//_____________________________________________________________________

Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Begin(Int_t event ) 
{

  Bool_t             retVal    = AliFMDInput::Begin(event); 
  AliStack*          partStack = fLoader->Stack();
  Int_t              nTracks   = partStack->GetNtrack();
  AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
  TArrayF vertex;
  genHeader->PrimaryVertex(vertex);
  
  if(TMath::Abs(vertex.At(2)) > fZvtxCut) 
    return kTRUE;
  
  Double_t delta           = 2*fZvtxCut/fNvtxBins;
  Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
  Int_t    vertexBin       = (Int_t)vertexBinDouble;
  
  for(Int_t j=0;j<nTracks;j++) {
    TParticle* p  = partStack->Particle(j);
    TDatabasePDG* pdgDB   = TDatabasePDG::Instance();
    TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
    Float_t       charge  = (pdgPart ? pdgPart->Charge() : 0);
    Float_t       phi     = TMath::ATan2(p->Py(),p->Px());
    
    if(phi<0) phi = phi+2*TMath::Pi();
    if(p->Theta() == 0) continue;
    Float_t eta   = -1*TMath::Log(TMath::Tan(0.5*p->Theta()));
    
    Bool_t primary = partStack->IsPhysicalPrimary(j);
    //(charge!=0)&&(TMath::Abs(p->Vx() - vertex.At(0))<0.01)&&(TMath::Abs(p->Vy() - vertex.At(1))<0.01)&&(TMath::Abs(p->Vz() - vertex.At(2))<0.01);
    if(primary && charge !=0) {
      
      fPrim++;
      TObjArray* innerArray = (TObjArray*)fPrimaryArray.At(0);
      TObjArray* outerArray = (TObjArray*)fPrimaryArray.At(1);
      
      TH2F* hPrimaryInner  = (TH2F*)innerArray->At(vertexBin);
      TH2F* hPrimaryOuter  = (TH2F*)outerArray->At(vertexBin);
      hPrimaryInner->Fill(eta,phi);
      hPrimaryOuter->Fill(eta,phi);
    }
  }
  
  return retVal;
}
//_____________________________________________________________________
//
// EOF
//
Commit	Line	Data
df0d5480	1	/**************************************************************************
	2	* Copyright(c) 2004, 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	// Thil class computes background corrections for the FMD. The correction is computed
	17	// in eta,phi cells and the objects stored can be put into alien to use with analysis.
	18	// It is based on the AliFMDInput class that is used to loop over hits and primaries.
	19	//
	20	// Author: Hans Hjersing Dalsgaard, NBI, hans.dalsgaard@cern.ch
	21	//
	22	//
	23
	24	#include "AliSimulation.h"
	25	#include "TStopwatch.h"
	26	#include "iostream"
	27	#include "TGrid.h"
	28	#include "AliRunLoader.h"
	29	#include "AliGeomManager.h"
	30	#include "AliFMDGeometry.h"
	31	#include "AliStack.h"
	32	#include "TParticle.h"
	33	#include "TDatabasePDG.h"
	34	#include "TParticlePDG.h"
	35	#include "AliRun.h"
	36	#include "AliFMDBackgroundCorrection.h"
	37	#include "TSystem.h"
	38	#include "AliCDBManager.h"
	39	#include "TTree.h"
	40	#include "TClonesArray.h"
	41	#include "TBranch.h"
	42	#include "AliFMDHit.h"
	43	#include "AliLoader.h"
	44	#include "AliFMD.h"
	45	#include "TH2F.h"
	46	#include "AliGenEventHeader.h"
	47	#include "AliHeader.h"
	48	#include "TFile.h"
	49	#include "TAxis.h"
	50	#include "AliCDBId.h"
	51	#include "AliCDBMetaData.h"
	52	#include "TROOT.h"
	53	#include "AliFMDParameters.h"
	54	#include "AliLog.h"
26c8b5ff	55	#include "TList.h"
8dc823cc	56	#include "AliFMDAnaParameters.h"
b82e76e0	57	#include "AliFMDAnaCalibBackgroundCorrection.h"
08d168d9	58	#include "AliTrackReference.h"
08d168d9	59	#include "AliFMDStripIndex.h"
df0d5480	60
	61	ClassImp(AliFMDBackgroundCorrection)
	62	//_____________________________________________________________________
	63	AliFMDBackgroundCorrection::AliFMDBackgroundCorrection() :
	64	TNamed(),
ca3af5d9	65	fCorrectionArray(),
ca3af5d9	66	fPrimaryList()
df0d5480	67	{}
	68
	69	//_____________________________________________________________________
08d168d9	70	AliFMDBackgroundCorrection::AliFMDInputBG::AliFMDInputBG(Bool_t hits_not_trackref) :
df0d5480	71	AliFMDInput(),
8dc823cc	72	fPrimaryArray(),
8dc823cc	73	fHitArray(),
df0d5480	74	fPrim(0),
	75	fHits(0),
	76	fZvtxCut(0),
	77	fNvtxBins(0),
	78	fPrevTrack(-1),
	79	fPrevDetector(-1),
	80	fPrevRing('Q'),
	81	fNbinsEta(100)
	82	{
	83	AddLoad(kTracks);
08d168d9	84	if(hits_not_trackref)
	85	AddLoad(kHits);
	86	else
	87	AddLoad(kTrackRefs);
df0d5480	88	AddLoad(kKinematics);
	89	AddLoad(kHeader);
	90	}
	91
	92	//_____________________________________________________________________
	93
08d168d9	94	void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(Bool_t from_hits,
08d168d9	95	const Int_t nvtxbins,
df0d5480	96	Float_t zvtxcut,
ca3af5d9	97	const Int_t nBinsEta,
df0d5480	98	Bool_t storeInAlien,
	99	Int_t runNo,
	100	Int_t endRunNo,
	101	const Char_t* filename,
	102	Bool_t simulate,
109e97cd	103	Int_t nEvents,
	104	Bool_t inFile,
	105	const Char_t* infilename) {
df0d5480	106
ca3af5d9	107	//TGrid::Connect("alien:",0,0,"t");
df0d5480	108	if(simulate)
	109	Simulate(nEvents);
	110	else {
ca3af5d9	111	//AliCDBManager::Instance()->SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
ca3af5d9	112	AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT");
df0d5480	113	AliCDBManager::Instance()->SetRun(runNo);
	114
	115	#if defined(__CINT__)
	116	gSystem->Load("liblhapdf");
	117	gSystem->Load("libEGPythia6");
	118	gSystem->Load("libpythia6");
	119	gSystem->Load("libAliPythia6");
	120	gSystem->Load("libgeant321");
	121	#endif
ca3af5d9	122	//
df0d5480	123	}
	124
	125	//Setting up the geometry
	126	//-----------------------------------------------
	127	if (AliGeomManager::GetGeometry() == NULL)
	128	AliGeomManager::LoadGeometry();
	129
	130	AliFMDGeometry* geo = AliFMDGeometry::Instance();
	131	geo->Init();
	132	geo->InitTransformations();
ca3af5d9	133
df0d5480	134	AliInfo("Processing hits and primaries ");
df0d5480	135
08d168d9	136	AliFMDInputBG input(from_hits);
df0d5480	137
109e97cd	138	if(!inFile) {
	139
	140	input.SetVtxCutZ(zvtxcut);
	141	input.SetNvtxBins(nvtxbins);
	142	input.SetNbinsEta(nBinsEta);
	143	input.Run();
	144	}
df0d5480	145
109e97cd	146	AliInfo(Form("Found %d primaries and %d hits.", input.GetNprim(),input.GetNhits()));
	147	TObjArray* hitArray ;
	148	TObjArray* primaryArray;
	149	if(inFile) {
	150	TFile* infile = TFile::Open(infilename);
	151	hitArray = new TObjArray();
	152	primaryArray = new TObjArray();
	153
	154	for(Int_t det =1; det<=3;det++)
	155	{
	156	TObjArray* detArrayHits = new TObjArray();
	157	detArrayHits->SetName(Form("FMD%d",det));
	158	hitArray->AddAtAndExpand(detArrayHits,det);
	159	Int_t nRings = (det==1 ? 1 : 2);
	160	for(Int_t ring = 0;ring<nRings;ring++)
	161	{
	162
	163	Char_t ringChar = (ring == 0 ? 'I' : 'O');
	164	TObjArray* vtxArrayHits = new TObjArray();
	165	vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	166	detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	167	for(Int_t v=0; v<nvtxbins;v++)
	168	{
	169
	170	TH2F* hHits = (TH2F*)infile->Get(Form("hHits_FMD%d%c_vtx%d",det,ringChar,v));
	171
	172
	173	vtxArrayHits->AddAtAndExpand(hHits,v);
	174
	175	}
	176	}
	177
	178	}
	179
	180	for(Int_t iring = 0; iring<2;iring++) {
	181	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	182	TObjArray* ringArray = new TObjArray();
	183	ringArray->SetName(Form("FMD_%c",ringChar));
	184	primaryArray->AddAtAndExpand(ringArray,iring);
	185	for(Int_t v=0; v<nvtxbins;v++) {
	186
	187	TH2F* hPrimary = (TH2F*)infile->Get(Form("hPrimary_FMD_%c_vtx%d",ringChar,v));
	188	ringArray->AddAtAndExpand(hPrimary,v);
	189	}
	190	}
	191
	192
	193	}
	194	else {
	195	hitArray = input.GetHits();
	196	primaryArray = input.GetPrimaries();
	197	}
df0d5480	198	fCorrectionArray.SetName("FMD_bg_correction");
df0d5480	199	fCorrectionArray.SetOwner();
ca3af5d9	200
ca3af5d9	201	TList* primaryList = new TList();
26c8b5ff	202	primaryList->SetName("primaries");
ca3af5d9	203
26c8b5ff	204	TList* hitList = new TList();
	205	hitList->SetName("hits");
	206	TList* corrList = new TList();
	207	corrList->SetName("corrections");
109e97cd	208
b82e76e0	209	AliFMDAnaCalibBackgroundCorrection* background = new AliFMDAnaCalibBackgroundCorrection();
b82e76e0	210
df0d5480	211	for(Int_t det= 1; det <=3; det++) {
	212	Int_t nRings = (det==1 ? 1 : 2);
	213
	214	TObjArray* detArrayCorrection = new TObjArray();
	215	detArrayCorrection->SetName(Form("FMD%d",det));
	216	fCorrectionArray.AddAtAndExpand(detArrayCorrection,det);
	217
	218
	219	for(Int_t iring = 0; iring<nRings; iring++) {
	220	TObjArray* primRingArray = (TObjArray*)primaryArray->At(iring);
	221	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	222	TObjArray* vtxArrayCorrection = new TObjArray();
	223	vtxArrayCorrection->SetName(Form("FMD%d%c",det,ringChar));
	224	detArrayCorrection->AddAtAndExpand(vtxArrayCorrection,iring);
	225
	226	for(Int_t vertexBin=0;vertexBin<nvtxbins;vertexBin++) {
	227	TObjArray* detArray = (TObjArray*)hitArray->At(det);
	228	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	229	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
26c8b5ff	230	hitList->Add(hHits);
df0d5480	231	TH2F* hPrimary = (TH2F*)primRingArray->At(vertexBin);
26c8b5ff	232	primaryList->Add(hPrimary);
df0d5480	233	TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ringChar,vertexBin));
ca3af5d9	234	hCorrection->Divide(hPrimary);
26c8b5ff	235	corrList->Add(hCorrection);
8dc823cc	236	hCorrection->SetTitle(hCorrection->GetName());
df0d5480	237	vtxArrayCorrection->AddAtAndExpand(hCorrection,vertexBin);
b82e76e0	238	background->SetBgCorrection(det,ringChar,vertexBin,hCorrection);
df0d5480	239	}
	240
	241	}
	242	}
	243
	244	TAxis refAxis(nvtxbins,-1*zvtxcut,zvtxcut);
109e97cd	245	if(inFile) {
	246	TFile* infile = TFile::Open(infilename);
	247	TAxis* refaxis = (TAxis*)infile->Get("vertexbins");
	248	background->SetRefAxis(refaxis);
	249
	250	}
	251	else background->SetRefAxis(&refAxis);
df0d5480	252
8dc823cc	253	TFile* fout = new TFile(filename,"RECREATE");
df0d5480	254	refAxis.Write("vertexbins");
26c8b5ff	255
	256	hitList->Write();
	257	primaryList->Write();
	258	corrList->Write();
ca3af5d9	259
8dc823cc	260	TObjArray* container = new TObjArray();
	261	container->SetOwner();
	262	container->AddAtAndExpand(&refAxis,0);
	263	container->AddAtAndExpand(&fCorrectionArray,1);
	264	container->AddAtAndExpand(hitArray,2);
	265	container->AddAtAndExpand(primaryArray,3);
b82e76e0	266
b82e76e0	267
df0d5480	268	if(storeInAlien) {
	269	AliCDBManager* cdb = AliCDBManager::Instance();
	270	cdb->SetDefaultStorage("local://$ALICE_ROOT");
8dc823cc	271	AliCDBId id(AliFMDAnaParameters::GetBackgroundPath(),runNo,endRunNo);
df0d5480	272
	273	AliCDBMetaData* meta = new AliCDBMetaData;
	274	meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());
	275	meta->SetAliRootVersion(gROOT->GetVersion());
	276	meta->SetBeamPeriod(1);
	277	meta->SetComment("Background Correction for FMD");
b82e76e0	278	meta->SetProperty("key1", background );
b82e76e0	279	cdb->Put(background, id, meta);
df0d5480	280
	281	}
	282
8dc823cc	283	fout->Close();
8dc823cc	284
df0d5480	285
ca3af5d9	286	}
ca3af5d9	287
df0d5480	288	//_____________________________________________________________________
	289	void AliFMDBackgroundCorrection::Simulate(Int_t nEvents) {
	290
	291	AliSimulation sim ;
	292	sim.SetRunNumber(0);
	293	TGrid::Connect("alien:",0,0,"t");
	294	sim.SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
	295	sim.SetConfigFile("Config.C");
	296	sim.SetRunQA("FMD:");
	297	TStopwatch timer;
	298	timer.Start();
	299	sim.RunSimulation(nEvents);
	300	timer.Stop();
	301	timer.Print();
	302
	303	}
	304
	305	//_____________________________________________________________________
faf80567	306	Bool_t
	307	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessHit(AliFMDHit* h,
	308	TParticle* /p/)
	309	{
df0d5480	310
08d168d9	311	if(!h)
08d168d9	312	return kTRUE;
faf80567	313	Bool_t retval = ProcessEvent(h->Detector(),
	314	h->Ring(),
	315	h->Sector()
	316	,h->Strip(),
	317	h->Track(),
	318	h->Q());
08d168d9	319
	320	return retval;
	321	}
	322	//_____________________________________________________________________
faf80567	323	Bool_t
	324	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessTrackRef(AliTrackReference* tr,
	325	TParticle* p)
	326	{
08d168d9	327	if(!tr)
	328	return kTRUE;
	329	UShort_t det,sec,strip;
	330	Char_t ring;
	331	AliFMDStripIndex::Unpack(tr->UserId(),det,ring,sec,strip);
faf80567	332	Int_t nTrack = tr->GetTrack();
faf80567	333	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
08d168d9	334	TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
faf80567	335	Float_t charge = (pdgPart ? pdgPart->Charge() : 0);
faf80567	336	Bool_t retval = ProcessEvent(det,ring,sec,strip,nTrack,charge);
08d168d9	337	return retval;
	338
	339	}
	340	//_____________________________________________________________________
faf80567	341	Bool_t
	342	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessEvent(UShort_t det,
	343	Char_t ring,
	344	UShort_t sec,
	345	UShort_t strip,
	346	Int_t nTrack,
	347	Float_t charge)
08d168d9	348	{
08d168d9	349
df0d5480	350	AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
	351	TArrayF vertex;
	352	genHeader->PrimaryVertex(vertex);
	353
	354	if(TMath::Abs(vertex.At(2)) > fZvtxCut)
	355	return kTRUE;
	356
faf80567	357	Double_t delta = 2 * fZvtxCut / fNvtxBins;
df0d5480	358	Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
faf80567	359	Int_t vertexBin = Int_t(vertexBinDouble);
df0d5480	360
faf80567	361	if(charge != 0 &&
	362	(nTrack != fPrevTrack \|\|
	363	det != fPrevDetector \|\|
	364	ring != fPrevRing)) {
08d168d9	365	Double_t x,y,z;
	366	AliFMDGeometry* fmdgeo = AliFMDGeometry::Instance();
	367	fmdgeo->Detector2XYZ(det,ring,sec,strip,x,y,z);
	368
	369	Int_t iring = (ring == 'I' ? 0 : 1);
	370
	371	TObjArray* detArray = (TObjArray*)fHitArray.At(det);
	372	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	373	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
	374
faf80567	375	Float_t phi = TMath::ATan2(y,x);
	376	if(phi<0) phi = phi+2*TMath::Pi();
	377	Float_t r = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
	378	Float_t theta = TMath::ATan2(r,z+vertex.At(2));
	379	Float_t eta = -1TMath::Log(TMath::Tan(0.5theta));
08d168d9	380	hHits->Fill(eta,phi);
	381	fHits++;
	382	fPrevDetector = det;
	383	fPrevRing = ring;
	384	}
ca3af5d9	385
08d168d9	386	fPrevTrack = nTrack;
df0d5480	387	return kTRUE;
08d168d9	388
df0d5480	389	}
	390
	391	//_____________________________________________________________________
faf80567	392	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Init()
faf80567	393	{
df0d5480	394	fPrimaryArray.SetOwner();
	395	fPrimaryArray.SetName("FMD_primary");
	396
	397	for(Int_t iring = 0; iring<2;iring++) {
	398	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	399	TObjArray* ringArray = new TObjArray();
	400	ringArray->SetName(Form("FMD_%c",ringChar));
	401	fPrimaryArray.AddAtAndExpand(ringArray,iring);
	402	Int_t nSec = (iring == 1 ? 40 : 20);
	403	for(Int_t v=0; v<fNvtxBins;v++) {
	404
	405	TH2F* hPrimary = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	406	Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	407	fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
b82e76e0	408	hPrimary->Sumw2();
df0d5480	409	ringArray->AddAtAndExpand(hPrimary,v);
	410	}
	411	}
	412
	413
	414	fHitArray.SetOwner();
	415	fHitArray.SetName("FMD_hits");
	416
faf80567	417	for(Int_t det =1; det<=3;det++) {
	418	TObjArray* detArrayHits = new TObjArray();
	419	detArrayHits->SetName(Form("FMD%d",det));
	420	fHitArray.AddAtAndExpand(detArrayHits,det);
	421	Int_t nRings = (det==1 ? 1 : 2);
	422	for(Int_t ring = 0;ring<nRings;ring++) {
	423	Int_t nSec = (ring == 1 ? 40 : 20);
	424	Char_t ringChar = (ring == 0 ? 'I' : 'O');
	425	TObjArray* vtxArrayHits = new TObjArray();
	426	vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	427	detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	428	for(Int_t v=0; v<fNvtxBins;v++) {
	429	TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
	430	Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
	431	fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
	432	hHits->Sumw2();
	433	vtxArrayHits->AddAtAndExpand(hHits,v);
	434
	435	}
df0d5480	436	}
faf80567	437	}
df0d5480	438
df0d5480	439	AliFMDInput::Init();
df0d5480	440
df0d5480	441	return kTRUE;
df0d5480	442	}
ca3af5d9	443	//_____________________________________________________________________
ca3af5d9	444
faf80567	445	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Begin(Int_t event )
faf80567	446	{
df0d5480	447
faf80567	448	Bool_t retVal = AliFMDInput::Begin(event);
	449	AliStack* partStack = fLoader->Stack();
	450	Int_t nTracks = partStack->GetNtrack();
ca3af5d9	451	AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
	452	TArrayF vertex;
	453	genHeader->PrimaryVertex(vertex);
	454
	455	if(TMath::Abs(vertex.At(2)) > fZvtxCut)
	456	return kTRUE;
	457
faf80567	458	Double_t delta = 2*fZvtxCut/fNvtxBins;
ca3af5d9	459	Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
faf80567	460	Int_t vertexBin = (Int_t)vertexBinDouble;
	461
	462	for(Int_t j=0;j<nTracks;j++) {
	463	TParticle* p = partStack->Particle(j);
	464	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
	465	TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
	466	Float_t charge = (pdgPart ? pdgPart->Charge() : 0);
	467	Float_t phi = TMath::ATan2(p->Py(),p->Px());
	468
	469	if(phi<0) phi = phi+2*TMath::Pi();
	470	if(p->Theta() == 0) continue;
	471	Float_t eta = -1TMath::Log(TMath::Tan(0.5p->Theta()));
	472
	473	Bool_t primary = partStack->IsPhysicalPrimary(j);
	474	//(charge!=0)&&(TMath::Abs(p->Vx() - vertex.At(0))<0.01)&&(TMath::Abs(p->Vy() - vertex.At(1))<0.01)&&(TMath::Abs(p->Vz() - vertex.At(2))<0.01);
	475	if(primary && charge !=0) {
	476
	477	fPrim++;
	478	TObjArray* innerArray = (TObjArray*)fPrimaryArray.At(0);
	479	TObjArray* outerArray = (TObjArray*)fPrimaryArray.At(1);
	480
	481	TH2F* hPrimaryInner = (TH2F*)innerArray->At(vertexBin);
	482	TH2F* hPrimaryOuter = (TH2F*)outerArray->At(vertexBin);
	483	hPrimaryInner->Fill(eta,phi);
	484	hPrimaryOuter->Fill(eta,phi);
	485	}
	486	}
109e97cd	487
ca3af5d9	488	return retVal;
	489	}
	490	//_____________________________________________________________________
	491	//
	492	// EOF
	493	//
df0d5480	494
df0d5480	495