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[u/mrichter/AliRoot.git] / EMCAL / AliEMCAL.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, 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.                  *
 **************************************************************************/

/* $Id$ */
/* History of cvs commits:
 *
 * $Log$

 * Revision 1.54  2007/12/06 10:31:13  hristov
 * Bug fix: using the mapping from CDB
 *
 * Revision 1.53.10.1  2007/12/06 10:29:59  hristov
 * Bug fix: using the mapping from CDB
 *
 * Revision 1.53  2007/03/17 19:56:38  mvl
 * Moved signal shape routines from AliEMCAL to separate class AliEMCALRawUtils to streamline raw data reconstruction code.
 *
 * Revision 1.52  2007/03/10 22:19:01  pavlinov
 * move one varibels from AliEMCALv2 to AliEMCAL
 *
 * Revision 1.51  2007/02/24 20:42:35  pavlinov
 * fixed error of Geant3 parameters initialisation
 *
 * Revision 1.50  2007/02/05 10:43:25  hristov
 * Changes for correct initialization of Geant4 (Mihaela)
 *
 * Revision 1.49  2007/01/22 17:29:12  pavlinov
 * EMCAL geometry can be created independently form anything now
 *
 * Revision 1.48  2006/12/19 02:34:13  pavlinov
 * clean up the EMCAL name scheme : super module -> module -> tower (or cell)
 *
 * Revision 1.47  2006/12/05 17:12:03  gustavo
 * Updated AliEMCAL::Digits2Raw, reads first provisional RCU mapping files to make Raw data with new AliCaloAltroMapping and AliCaloRawStream
 *
 *
 */
//_________________________________________________________________________
// Base Class for EMCAL description:
// This class contains material definitions    
// for the EMCAL - It does not place the detector in Alice
//*-- Author: Yves Schutz (SUBATECH) 
//
//*-- Additional Contributions: Sahal Yacoob (LBNL/UCT)
//
//////////////////////////////////////////////////////////////////////////////

// --- ROOT system ---
class TFile;
#include <TFolder.h> 
#include <TTree.h>
#include <TVirtualMC.h> 
#include <TH1F.h> 
#include <TRandom.h> 
#include <TGraph.h> 

// --- Standard library ---

// --- AliRoot header files ---
#include "AliMagF.h"
#include "AliEMCAL.h"
#include "AliRun.h"
#include "AliEMCALLoader.h"
#include "AliEMCALSDigitizer.h"
#include "AliEMCALDigitizer.h"
#include "AliEMCALDigit.h"
#include "AliEMCALRawUtils.h"
#include "AliCDBManager.h"
#include "AliCDBEntry.h"


ClassImp(AliEMCAL)

//____________________________________________________________________________
AliEMCAL::AliEMCAL()
  : AliDetector(),
    fBirkC0(0),
    fBirkC1(0.),
    fBirkC2(0.),
    fGeometry(0)
{
  // Default ctor 
  fName = "EMCAL" ;
  InitConstants();
  // Should call  AliEMCALGeometry::GetInstance(EMCAL->GetTitle(),"") for getting EMCAL geometry
}

//____________________________________________________________________________
AliEMCAL::AliEMCAL(const char* name, const char* title)
  : AliDetector(name,title),
    fBirkC0(0),
    fBirkC1(0.),
    fBirkC2(0.),
    fGeometry(0)
{
  //   ctor : title is used to identify the layout
  InitConstants();
}

//____________________________________________________________________________
AliEMCAL::~AliEMCAL()
{
  //dtor
}

//____________________________________________________________________________
void AliEMCAL::InitConstants()
{
  //initialize EMCAL values
  fBirkC0 = 1;
  fBirkC1 = 0.013/1.032;
  fBirkC2 = 9.6e-6/(1.032 * 1.032);
  }

//____________________________________________________________________________
void AliEMCAL::DefineMediumParameters()
{
  //
  // EMCAL cuts (Geant3) 
  // 
  Int_t * idtmed = fIdtmed->GetArray() - 1599 ; 
// --- Set decent energy thresholds for gamma and electron tracking

  // Tracking threshold for photons and electrons in Lead 
  Float_t cutgam=10.e-5; // 100 kev;
  Float_t cutele=10.e-5; // 100 kev;
  TString ntmp(GetTitle()); 
  ntmp.ToUpper();
  if(ntmp.Contains("10KEV")) {
    cutele = cutgam = 1.e-5;
  } else if(ntmp.Contains("50KEV")) {
    cutele = cutgam = 5.e-5;
  } else if(ntmp.Contains("100KEV")) {
    cutele = cutgam = 1.e-4;
  } else if(ntmp.Contains("200KEV")) {
    cutele = cutgam = 2.e-4;
  } else if(ntmp.Contains("500KEV")) {
    cutele = cutgam = 5.e-4;
  }

  gMC->Gstpar(idtmed[1600],"CUTGAM", cutgam);
  gMC->Gstpar(idtmed[1600],"CUTELE", cutele); // 1MEV -> 0.1MEV; 15-aug-05
  gMC->Gstpar(idtmed[1600],"BCUTE",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1600],"BCUTM",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  // --- Generate explicitly delta rays in Lead ---
  gMC->Gstpar(idtmed[1600], "LOSS", 3) ;
  gMC->Gstpar(idtmed[1600], "DRAY", 1) ;
  gMC->Gstpar(idtmed[1600], "DCUTE", cutele) ;
  gMC->Gstpar(idtmed[1600], "DCUTM", cutele) ;

// --- in aluminium parts ---
  gMC->Gstpar(idtmed[1602],"CUTGAM", cutgam) ;
  gMC->Gstpar(idtmed[1602],"CUTELE", cutele) ;
  gMC->Gstpar(idtmed[1602],"BCUTE",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1602],"BCUTM",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1602], "LOSS",3.) ;
  gMC->Gstpar(idtmed[1602], "DRAY",1.) ;
  gMC->Gstpar(idtmed[1602], "DCUTE", cutele) ;
  gMC->Gstpar(idtmed[1602], "DCUTM", cutele) ;

// --- and finally thresholds for photons and electrons in the scintillator ---
  gMC->Gstpar(idtmed[1601],"CUTGAM", cutgam) ;
  gMC->Gstpar(idtmed[1601],"CUTELE", cutele) ;// 1MEV -> 0.1MEV; 15-aug-05
  gMC->Gstpar(idtmed[1601],"BCUTE",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1601],"BCUTM",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1601], "LOSS",3) ; // generate delta rays 
  gMC->Gstpar(idtmed[1601], "DRAY",1) ;
  gMC->Gstpar(idtmed[1601], "DCUTE", cutele) ;
  gMC->Gstpar(idtmed[1601], "DCUTM", cutele) ;

  // S steel - 
  gMC->Gstpar(idtmed[1603],"CUTGAM", cutgam);
  gMC->Gstpar(idtmed[1603],"CUTELE", cutele);
  gMC->Gstpar(idtmed[1603],"BCUTE",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  gMC->Gstpar(idtmed[1603],"BCUTM",  cutgam);  // BCUTE and BCUTM start from GUTGUM
  // --- Generate explicitly delta rays 
  gMC->Gstpar(idtmed[1603], "LOSS",3);
  gMC->Gstpar(idtmed[1603], "DRAY",1);
  gMC->Gstpar(idtmed[1603], "DCUTE", cutele) ;
  gMC->Gstpar(idtmed[1603], "DCUTM", cutele) ;

  AliEMCALGeometry* geom = GetGeometry();
  if(geom->GetILOSS()>=0) {
    for(int i=1600; i<=1603; i++) gMC->Gstpar(idtmed[i], "LOSS", geom->GetILOSS()) ; 
  } 
  if(geom->GetIHADR()>=0) {
    for(int i=1600; i<=1603; i++) gMC->Gstpar(idtmed[i], "HADR", geom->GetIHADR()) ; 
  }
}

//____________________________________________________________________________
AliDigitizer* AliEMCAL::CreateDigitizer(AliRunDigitizer* manager) const
{
  //create and return the digitizer
  return new AliEMCALDigitizer(manager);
}

//____________________________________________________________________________
void AliEMCAL::CreateMaterials()
{
  // Definitions of materials to build EMCAL and associated tracking media.
  // media number in idtmed are 1599 to 1698.
  // --- Air ---               
  Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
  Float_t zAir[4]={6.,7.,8.,18.};
  Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
  Float_t dAir = 1.20479E-3;
  AliMixture(0, "Air$", aAir, zAir, dAir, 4, wAir) ;

  // --- Lead ---                                                                     
  AliMaterial(1, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;


  // --- The polysterene scintillator (CH) ---
  Float_t aP[2] = {12.011, 1.00794} ;
  Float_t zP[2] = {6.0, 1.0} ;
  Float_t wP[2] = {1.0, 1.0} ;
  Float_t dP = 1.032 ;

  AliMixture(2, "Polystyrene$", aP, zP, dP, -2, wP) ;

  // --- Aluminium ---
  AliMaterial(3, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
  // ---         Absorption length is ignored ^

  // 25-aug-04 by PAI - see  PMD/AliPMDv0.cxx for STEEL definition
  Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
  Float_t zsteel[4] = { 26.,24.,28.,14. };
  Float_t wsteel[4] = { .715,.18,.1,.005 };
  AliMixture(4, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);

  // DEFINITION OF THE TRACKING MEDIA

  // for EMCAL: idtmed[1599->1698] equivalent to fIdtmed[0->100]
  Int_t   isxfld = gAlice->Field()->Integ() ;
  Float_t sxmgmx = gAlice->Field()->Max() ;

  // Air                                                                         -> idtmed[1599]
 AliMedium(0, "Air$", 0, 0,
	     isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;

  // The Lead                                                                      -> idtmed[1600]
 
  AliMedium(1, "Lead$", 1, 0,
	     isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;

 // The scintillator of the CPV made of Polystyrene scintillator                   -> idtmed[1601]
  float deemax = 0.1; // maximum fractional energy loss in one step (0 < DEEMAX < deemax )
  AliMedium(2, "Scintillator$", 2, 1,
            isxfld, sxmgmx, 10.0, 0.001, deemax, 0.001, 0.001, 0, 0) ;

  // Various Aluminium parts made of Al                                            -> idtmed[1602]
  AliMedium(3, "Al$", 3, 0,
             isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;

  // 25-aug-04 by PAI : see  PMD/AliPMDv0.cxx for STEEL definition                 -> idtmed[1603]
  AliMedium(4, "S steel$", 4, 0, 
             isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;


  //set constants for Birk's Law implentation
  fBirkC0 =  1;
  fBirkC1 =  0.013/dP;
  fBirkC2 =  9.6e-6/(dP * dP);

  // Call just in case of Geant3; What to do in case of Geant4 ?
  if(gMC->InheritsFrom("TGeant3")) DefineMediumParameters(); // Feb 20, 2007
}
//____________________________________________________________________________
void AliEMCAL::Digits2Raw() {
  static AliEMCALRawUtils rawUtil;
  //Get Mapping RCU files from the AliEMCALRecParam                                                          
  static AliCDBEntry* entry = AliCDBManager::Instance()->Get("EMCAL/Calib/Mapping");
  const TObjArray* maps = 0x0;
  if(entry)
    maps = (TObjArray*)entry->GetObject();

  if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");

  AliAltroMapping * mapping[2] ; // For the moment only 2                                                    
  for(Int_t i = 0; i < 2; i++) {
    mapping[i] = (AliAltroMapping*)maps->At(i);
  }
  rawUtil.Digits2Raw(mapping);
}
//____________________________________________________________________________
void AliEMCAL::Hits2SDigits()  
{ 
// create summable digits

  GetGeometry();
  AliEMCALSDigitizer emcalDigitizer(fLoader->GetRunLoader()->GetFileName().Data()) ;
  emcalDigitizer.SetEventRange(0, -1) ; // do all the events
  emcalDigitizer.ExecuteTask() ;
}

//____________________________________________________________________________

AliLoader* AliEMCAL::MakeLoader(const char* topfoldername)
{
//different behaviour than standard (singleton getter)
// --> to be discussed and made eventually coherent
 fLoader = new AliEMCALLoader(GetName(),topfoldername);
 return fLoader;
}