[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"

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

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

//_____________________________________________________________________

void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(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) {
  
  //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;
  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 = input.GetHits();
  TObjArray* 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);
  
  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) {
  
  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;
  
  Int_t i = h->Track();
  
  if(h)
    if(h->Q() !=  0 && (i != fPrevTrack || h->Detector() != fPrevDetector || h->Ring() != fPrevRing)) {
      
      Int_t det = h->Detector();
      Char_t ring = h->Ring();
      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(h->Py(),h->Px());
      if(phi<0)
	phi = phi+2*TMath::Pi();
      Float_t theta = TMath::ATan2(TMath::Sqrt(TMath::Power(h->X(),2)+TMath::Power(h->Y(),2)),h->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 = i;
  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 = (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) {
	    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"
df0d5480	58
	59	ClassImp(AliFMDBackgroundCorrection)
	60	//_____________________________________________________________________
	61	AliFMDBackgroundCorrection::AliFMDBackgroundCorrection() :
	62	TNamed(),
ca3af5d9	63	fCorrectionArray(),
ca3af5d9	64	fPrimaryList()
df0d5480	65	{}
	66
	67	//_____________________________________________________________________
	68	AliFMDBackgroundCorrection::AliFMDInputBG::AliFMDInputBG() :
	69	AliFMDInput(),
8dc823cc	70	fPrimaryArray(),
8dc823cc	71	fHitArray(),
df0d5480	72	fPrim(0),
	73	fHits(0),
	74	fZvtxCut(0),
	75	fNvtxBins(0),
	76	fPrevTrack(-1),
	77	fPrevDetector(-1),
	78	fPrevRing('Q'),
	79	fNbinsEta(100)
	80	{
	81	AddLoad(kTracks);
	82	AddLoad(kHits);
	83	AddLoad(kKinematics);
	84	AddLoad(kHeader);
	85	}
	86
	87	//_____________________________________________________________________
	88
ca3af5d9	89	void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(const Int_t nvtxbins,
df0d5480	90	Float_t zvtxcut,
ca3af5d9	91	const Int_t nBinsEta,
df0d5480	92	Bool_t storeInAlien,
	93	Int_t runNo,
	94	Int_t endRunNo,
	95	const Char_t* filename,
	96	Bool_t simulate,
	97	Int_t nEvents) {
	98
ca3af5d9	99	//TGrid::Connect("alien:",0,0,"t");
df0d5480	100	if(simulate)
	101	Simulate(nEvents);
	102	else {
ca3af5d9	103	//AliCDBManager::Instance()->SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
ca3af5d9	104	AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT");
df0d5480	105	AliCDBManager::Instance()->SetRun(runNo);
	106
	107	#if defined(__CINT__)
	108	gSystem->Load("liblhapdf");
	109	gSystem->Load("libEGPythia6");
	110	gSystem->Load("libpythia6");
	111	gSystem->Load("libAliPythia6");
	112	gSystem->Load("libgeant321");
	113	#endif
ca3af5d9	114	//
df0d5480	115	}
	116
	117	//Setting up the geometry
	118	//-----------------------------------------------
	119	if (AliGeomManager::GetGeometry() == NULL)
	120	AliGeomManager::LoadGeometry();
	121
	122	AliFMDGeometry* geo = AliFMDGeometry::Instance();
	123	geo->Init();
	124	geo->InitTransformations();
ca3af5d9	125
df0d5480	126	AliInfo("Processing hits and primaries ");
	127
	128	AliFMDInputBG input;
	129	input.SetVtxCutZ(zvtxcut);
	130	input.SetNvtxBins(nvtxbins);
	131	input.SetNbinsEta(nBinsEta);
	132	input.Run();
	133
	134	AliInfo(Form("Found %d primaries and %d hits.", input.GetNprim(),input.GetNhits()));
	135
	136	TObjArray* hitArray = input.GetHits();
	137	TObjArray* primaryArray = input.GetPrimaries();
	138	fCorrectionArray.SetName("FMD_bg_correction");
	139	fCorrectionArray.SetOwner();
ca3af5d9	140
ca3af5d9	141	TList* primaryList = new TList();
26c8b5ff	142	primaryList->SetName("primaries");
ca3af5d9	143
26c8b5ff	144	TList* hitList = new TList();
	145	hitList->SetName("hits");
	146	TList* corrList = new TList();
	147	corrList->SetName("corrections");
	148
b82e76e0	149	AliFMDAnaCalibBackgroundCorrection* background = new AliFMDAnaCalibBackgroundCorrection();
b82e76e0	150
df0d5480	151	for(Int_t det= 1; det <=3; det++) {
	152	Int_t nRings = (det==1 ? 1 : 2);
	153
	154	TObjArray* detArrayCorrection = new TObjArray();
	155	detArrayCorrection->SetName(Form("FMD%d",det));
	156	fCorrectionArray.AddAtAndExpand(detArrayCorrection,det);
	157
	158
	159	for(Int_t iring = 0; iring<nRings; iring++) {
	160	TObjArray* primRingArray = (TObjArray*)primaryArray->At(iring);
	161	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	162	TObjArray* vtxArrayCorrection = new TObjArray();
	163	vtxArrayCorrection->SetName(Form("FMD%d%c",det,ringChar));
	164	detArrayCorrection->AddAtAndExpand(vtxArrayCorrection,iring);
	165
	166	for(Int_t vertexBin=0;vertexBin<nvtxbins;vertexBin++) {
	167	TObjArray* detArray = (TObjArray*)hitArray->At(det);
	168	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	169	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
26c8b5ff	170	hitList->Add(hHits);
df0d5480	171	TH2F* hPrimary = (TH2F*)primRingArray->At(vertexBin);
26c8b5ff	172	primaryList->Add(hPrimary);
df0d5480	173	TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ringChar,vertexBin));
ca3af5d9	174	hCorrection->Divide(hPrimary);
26c8b5ff	175	corrList->Add(hCorrection);
8dc823cc	176	hCorrection->SetTitle(hCorrection->GetName());
df0d5480	177	vtxArrayCorrection->AddAtAndExpand(hCorrection,vertexBin);
b82e76e0	178	background->SetBgCorrection(det,ringChar,vertexBin,hCorrection);
df0d5480	179	}
	180
	181	}
	182	}
	183
	184	TAxis refAxis(nvtxbins,-1*zvtxcut,zvtxcut);
	185
b82e76e0	186	background->SetRefAxis(&refAxis);
df0d5480	187
8dc823cc	188	TFile* fout = new TFile(filename,"RECREATE");
df0d5480	189	refAxis.Write("vertexbins");
26c8b5ff	190
	191	hitList->Write();
	192	primaryList->Write();
	193	corrList->Write();
ca3af5d9	194
8dc823cc	195	TObjArray* container = new TObjArray();
	196	container->SetOwner();
	197	container->AddAtAndExpand(&refAxis,0);
	198	container->AddAtAndExpand(&fCorrectionArray,1);
	199	container->AddAtAndExpand(hitArray,2);
	200	container->AddAtAndExpand(primaryArray,3);
b82e76e0	201
b82e76e0	202
df0d5480	203	if(storeInAlien) {
	204	AliCDBManager* cdb = AliCDBManager::Instance();
	205	cdb->SetDefaultStorage("local://$ALICE_ROOT");
8dc823cc	206	AliCDBId id(AliFMDAnaParameters::GetBackgroundPath(),runNo,endRunNo);
df0d5480	207
	208	AliCDBMetaData* meta = new AliCDBMetaData;
	209	meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());
	210	meta->SetAliRootVersion(gROOT->GetVersion());
	211	meta->SetBeamPeriod(1);
	212	meta->SetComment("Background Correction for FMD");
b82e76e0	213	meta->SetProperty("key1", background );
b82e76e0	214	cdb->Put(background, id, meta);
df0d5480	215
	216	}
	217
8dc823cc	218	fout->Close();
8dc823cc	219
df0d5480	220
ca3af5d9	221	}
ca3af5d9	222
df0d5480	223	//_____________________________________________________________________
	224	void AliFMDBackgroundCorrection::Simulate(Int_t nEvents) {
	225
	226	AliSimulation sim ;
	227	sim.SetRunNumber(0);
	228	TGrid::Connect("alien:",0,0,"t");
	229	sim.SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
	230	sim.SetConfigFile("Config.C");
	231	sim.SetRunQA("FMD:");
	232	TStopwatch timer;
	233	timer.Start();
	234	sim.RunSimulation(nEvents);
	235	timer.Stop();
	236	timer.Print();
	237
	238	}
	239
	240	//_____________________________________________________________________
ca3af5d9	241	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::ProcessHit( AliFMDHit* h, TParticle* p) {
df0d5480	242
df0d5480	243	AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
	244	TArrayF vertex;
	245	genHeader->PrimaryVertex(vertex);
	246
	247	if(TMath::Abs(vertex.At(2)) > fZvtxCut)
	248	return kTRUE;
	249
	250	Double_t delta = 2*fZvtxCut/fNvtxBins;
	251	Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
	252	Int_t vertexBin = (Int_t)vertexBinDouble;
	253
ca3af5d9	254	Int_t i = h->Track();
ca3af5d9	255
df0d5480	256	if(h)
	257	if(h->Q() != 0 && (i != fPrevTrack \|\| h->Detector() != fPrevDetector \|\| h->Ring() != fPrevRing)) {
	258
	259	Int_t det = h->Detector();
	260	Char_t ring = h->Ring();
df0d5480	261	Int_t iring = (ring == 'I' ? 0 : 1);
	262
	263	TObjArray* detArray = (TObjArray*)fHitArray.At(det);
	264	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	265	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
	266
	267	Float_t phi = TMath::ATan2(h->Py(),h->Px());
	268	if(phi<0)
	269	phi = phi+2*TMath::Pi();
	270	Float_t theta = TMath::ATan2(TMath::Sqrt(TMath::Power(h->X(),2)+TMath::Power(h->Y(),2)),h->Z()+vertex.At(2));
	271	Float_t eta = -1TMath::Log(TMath::Tan(0.5theta));
	272	hHits->Fill(eta,phi);
	273	fHits++;
df0d5480	274	fPrevDetector = det;
	275	fPrevRing = ring;
	276	}
ca3af5d9	277
df0d5480	278	fPrevTrack = i;
	279	return kTRUE;
	280	}
	281
	282	//_____________________________________________________________________
	283	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Init() {
	284
	285	fPrimaryArray.SetOwner();
	286	fPrimaryArray.SetName("FMD_primary");
	287
	288	for(Int_t iring = 0; iring<2;iring++) {
	289	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	290	TObjArray* ringArray = new TObjArray();
	291	ringArray->SetName(Form("FMD_%c",ringChar));
	292	fPrimaryArray.AddAtAndExpand(ringArray,iring);
	293	Int_t nSec = (iring == 1 ? 40 : 20);
	294	for(Int_t v=0; v<fNvtxBins;v++) {
	295
	296	TH2F* hPrimary = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	297	Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	298	fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
b82e76e0	299	hPrimary->Sumw2();
df0d5480	300	ringArray->AddAtAndExpand(hPrimary,v);
	301	}
	302	}
	303
	304
	305	fHitArray.SetOwner();
	306	fHitArray.SetName("FMD_hits");
	307
	308	for(Int_t det =1; det<=3;det++)
	309	{
	310	TObjArray* detArrayHits = new TObjArray();
	311	detArrayHits->SetName(Form("FMD%d",det));
	312	fHitArray.AddAtAndExpand(detArrayHits,det);
	313	Int_t nRings = (det==1 ? 1 : 2);
	314	for(Int_t ring = 0;ring<nRings;ring++)
	315	{
	316	Int_t nSec = (ring == 1 ? 40 : 20);
	317	Char_t ringChar = (ring == 0 ? 'I' : 'O');
	318	TObjArray* vtxArrayHits = new TObjArray();
	319	vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	320	detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	321	for(Int_t v=0; v<fNvtxBins;v++)
	322	{
	323
	324	TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d",det,ringChar,v),
	325	Form("hHits_FMD%d%c_vtx%d",det,ringChar,v),
	326	fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
b82e76e0	327	hHits->Sumw2();
df0d5480	328	vtxArrayHits->AddAtAndExpand(hHits,v);
	329
	330	}
	331	}
	332
	333	}
	334
	335
	336
	337	AliFMDInput::Init();
	338
	339
	340	return kTRUE;
	341	}
ca3af5d9	342	//_____________________________________________________________________
	343
	344	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Begin(Int_t event ) {
df0d5480	345
ca3af5d9	346	Bool_t retVal = AliFMDInput::Begin(event);
	347
	348	AliStack* partStack=fLoader->Stack();
	349
	350	Int_t nTracks=partStack->GetNtrack();
	351	AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
	352	TArrayF vertex;
	353	genHeader->PrimaryVertex(vertex);
	354
	355	if(TMath::Abs(vertex.At(2)) > fZvtxCut)
	356	return kTRUE;
	357
	358	Double_t delta = 2*fZvtxCut/fNvtxBins;
	359	Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
	360	Int_t vertexBin = (Int_t)vertexBinDouble;
	361
	362	for(Int_t j=0;j<nTracks;j++)
	363	{
	364	TParticle* p = partStack->Particle(j);
	365	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
	366	TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
	367	Float_t charge = (pdgPart ? pdgPart->Charge() : 0);
	368	Float_t phi = TMath::ATan2(p->Py(),p->Px());
	369
	370	if(phi<0)
	371	phi = phi+2*TMath::Pi();
	372	if(p->Theta() == 0) continue;
	373	Float_t eta = -1TMath::Log(TMath::Tan(0.5p->Theta()));
	374
	375	Bool_t primary = (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);
	376	if(primary) {
	377	fPrim++;
	378	TObjArray* innerArray = (TObjArray*)fPrimaryArray.At(0);
	379	TObjArray* outerArray = (TObjArray*)fPrimaryArray.At(1);
	380
	381	TH2F* hPrimaryInner = (TH2F*)innerArray->At(vertexBin);
	382	TH2F* hPrimaryOuter = (TH2F*)outerArray->At(vertexBin);
	383	hPrimaryInner->Fill(eta,phi);
	384	hPrimaryOuter->Fill(eta,phi);
	385	}
	386	}
	387
	388	return retVal;
	389	}
	390	//_____________________________________________________________________
	391	//
	392	// EOF
	393	//
df0d5480	394
df0d5480	395