[u/mrichter/AliRoot.git] / ZDC / AliZDCDigitizer.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.                  *
 **************************************************************************/

/* $Id$ */

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  			ZDC digitizer class                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include <stdlib.h>

// --- ROOT system
#include <TTree.h>
#include <TFile.h>
#include <TNtuple.h>
#include <TRandom.h>

// --- AliRoot header files
#include "AliLog.h"
#include "AliRun.h"
#include "AliHeader.h"
#include "AliGenHijingEventHeader.h"
#include "AliRunDigitizer.h"
#include "AliRunLoader.h"
#include "AliCDBManager.h"
#include "AliCDBEntry.h"
#include "AliZDCSDigit.h"
#include "AliZDCDigit.h"
#include "AliZDCFragment.h"
#include "AliZDCDigitizer.h"

class AliCDBStorage;
class AliZDCCalibData;

ClassImp(AliZDCDigitizer)


//____________________________________________________________________________
AliZDCDigitizer::AliZDCDigitizer()
{
// Default constructor    

}

//____________________________________________________________________________
AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
  AliDigitizer(manager)
{
  fIsCalibration=0; //By default the simulation doesn't create calib. data
  // Get calibration data
  fCalibData = GetCalibData(); 
  if(fIsCalibration!=0) printf("\t **** AliZDCDigitizer -> Creating calibration data (pedestals)\n");

}

//____________________________________________________________________________
AliZDCDigitizer::~AliZDCDigitizer()
{
// Destructor

}


//____________________________________________________________________________
AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
  AliDigitizer()
{
  // Copy constructor

  for(Int_t i=0; i<6; i++){
     for(Int_t j=0; j<5; j++){
        fPMGain[i][j]   = digitizer.fPMGain[i][j];           
     }
  }
  for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
  fIsCalibration = digitizer.fIsCalibration;
  fCalibData = digitizer.fCalibData;

}

//____________________________________________________________________________
Bool_t AliZDCDigitizer::Init()
{
  // Initialize the digitizer
  // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
   for(Int_t j = 0; j < 5; j++){
     fPMGain[0][j] = 50000.;
     fPMGain[1][j] = 100000.;
     fPMGain[2][j] = 100000.;
     fPMGain[3][j] = 50000.;
     fPMGain[4][j] = 100000.;
     fPMGain[5][j] = 100000.;
   }
   // ADC Caen V965
  fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
  fADCRes[1] = 0.0000064; // ADC Resolution low gain:  25  fC/adcCh

  return kTRUE;
}

//____________________________________________________________________________
void AliZDCDigitizer::Exec(Option_t* /*option*/)
{
  // Execute digitization

  // ------------------------------------------------------------
  // !!! 2nd ZDC set added (needed for trigger purposes!)
  // *** 1st 3 arrays are digits from REAL (simulated) hits
  // *** last 2 are copied from simulated digits
  // --- pm[0][...] = light in ZN right  [C, Q1, Q2, Q3, Q4]
  // --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
  // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
  // --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
  // --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
  // ------------------------------------------------------------
  Float_t pm[5][5]; 
  for(Int_t iSector1=0; iSector1<5; iSector1++) 
    for(Int_t iSector2=0; iSector2<5; iSector2++){
      pm[iSector1][iSector2] = 0;
    }
    
  // ------------------------------------------------------------
  // ### Out of time ADC added (22 channels)
  // --- same codification as for signal PTMs (see above)
  // ------------------------------------------------------------
  Float_t pmoot[5][5];
  for(Int_t iSector1=0; iSector1<5; iSector1++) 
    for(Int_t iSector2=0; iSector2<5; iSector2++){
      pmoot[iSector1][iSector2] = 0;
    }

  // impact parameter and number of spectators
  Float_t impPar = -1;
  Int_t specN = 0;
  Int_t specP = 0;

  // loop over input streams
  for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){

    // get run loader and ZDC loader
    AliRunLoader* runLoader = 
      AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
    AliLoader* loader = runLoader->GetLoader("ZDCLoader");
    if(!loader) continue;

    // load sdigits
    loader->LoadSDigits();
    TTree* treeS = loader->TreeS();
    if(!treeS) continue;
    AliZDCSDigit sdigit;
    AliZDCSDigit* psdigit = &sdigit;
    treeS->SetBranchAddress("ZDC", &psdigit);

    // loop over sdigits
    for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
      treeS->GetEntry(iSDigit);
      //
      if(!psdigit) continue;
      if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
	AliError(Form("\nsector[0] = %d, sector[1] = %d\n", 
                      sdigit.GetSector(0), sdigit.GetSector(1)));
	continue;
      }
      //
      pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
      /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
      	  sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
      	  sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
      */
    }

    loader->UnloadSDigits();

    // get the impact parameter and the number of spectators in case of hijing
    if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
    AliHeader* header = runLoader->GetAliRun()->GetHeader();
    if(!header) continue;
    AliGenEventHeader* genHeader = header->GenEventHeader();
    if(!genHeader) continue;
    if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
    impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
    // 
    specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
    specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
    AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
                     impPar, specN, specP));
    printf("\n\t AliZDCDigitizer -> b = %f fm, NSpecn = %d, NSpecp = %d\n", impPar, specN, specP);
  }

  // add spectators
  if(impPar >= 0) {
    Int_t freeSpecN, freeSpecP;
    Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
    printf("\n\t AliZDCDigitizer ---- Adding signal for %d free spectator n\n",freeSpecN);
    SpectatorSignal(1, freeSpecN, pm);
    printf("\t AliZDCDigitizer ---- Adding signal for %d free spectator p\n\n",freeSpecP);
    SpectatorSignal(2, freeSpecP, pm);
  }


  // get the output run loader and loader
  AliRunLoader* runLoader = 
    AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
  AliLoader* loader = runLoader->GetLoader("ZDCLoader");
  if(!loader) {
    AliError("no ZDC loader found");
    return;
  }

  // create the output tree
  const char* mode = "update";
  if(runLoader->GetEventNumber() == 0) mode = "recreate";
  loader->LoadDigits(mode);
  loader->MakeTree("D");
  TTree* treeD = loader->TreeD();
  AliZDCDigit digit;
  AliZDCDigit* pdigit = &digit;
  const Int_t kBufferSize = 4000;
  treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);

  // Create digits
  Int_t sector[2], sectorL[2];
  Int_t digi[2], digiL[2], digioot[2];
  for(sector[0]=1; sector[0]<=3; sector[0]++){
    for(sector[1]=0; sector[1]<5; sector[1]++){
        if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
        for(Int_t res=0; res<2; res++){
           digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res) 
	            + Pedestal(sector[0], sector[1], res);
      	}
	/*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	     sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
	*/
	//
	new(pdigit) AliZDCDigit(sector, digi);
        treeD->Fill();
	//
	// --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
	// --- they are copied from right ZDC digits
	if(sector[0]==1 || sector[0]==2){
	   sectorL[0] = sector[0]+3;
	   sectorL[1] = sector[1];
           for(Int_t res=0; res<2; res++){
             digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res) 
	            + Pedestal(sectorL[0], sectorL[1], res);
      	   }
	   /*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	         sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
	   */
	   //
	   new(pdigit) AliZDCDigit(sectorL, digiL);
           treeD->Fill();
	}
	//
        //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
    }
  }
  //
  // --- Adding digits for out-of-time channels after signal digits
  for(sector[0]=1; sector[0]<=3; sector[0]++){
    for(sector[1]=0; sector[1]<5; sector[1]++){
        if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
        for(Int_t res=0; res<2; res++){
           digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
      	}
	/*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	     sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
	*/
	//
	new(pdigit) AliZDCDigit(sector, digioot);
        treeD->Fill();
	//
	if(sector[0]==1 || sector[0]==2){
	   sectorL[0] = sector[0]+3;
	   sectorL[1] = sector[1];
           for(Int_t res=0; res<2; res++){
             digioot[res] = Pedestal(sectorL[0], sectorL[1], res); // out-of-time ADCs
      	   }
	   /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	         sectorL[0], sectorL[1], digioot[0], digioot[1]); // Chiara debugging!
	   */
	   //
	   new(pdigit) AliZDCDigit(sectorL, digioot);
           treeD->Fill();
	}
	//
        //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
    }
  }
  // write the output tree
  loader->WriteDigits("OVERWRITE");
  loader->UnloadDigits();
}


//_____________________________________________________________________________
void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
                                    Int_t &freeSpecN, Int_t &freeSpecP) const
{
// simulate fragmentation of spectators

  Int_t zz[100], nn[100];
  AliZDCFragment frag(impPar);
  for(Int_t j=0; j<=99; j++){
     zz[j] =0;
     nn[j] =0;
  }

  // Fragments generation
  Int_t nAlpha;
  frag.GenerateIMF(zz, nAlpha);

  // Attach neutrons
  Int_t ztot=0;
  Int_t ntot=0;
  frag.AttachNeutrons(zz, nn, ztot, ntot);
  freeSpecN = specN-ntot-2*nAlpha;
  freeSpecP = specP-ztot-2*nAlpha;
  if(freeSpecN<0) freeSpecN=0;
  if(freeSpecP<0) freeSpecP=0;
  AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
}

//_____________________________________________________________________________
void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents, 
                                      Float_t pm[3][5]) const
{
// add signal of the spectators
 
  TFile* file = NULL;
  if(SpecType == 1) {		// --- Signal for spectator neutrons
    file = TFile::Open("$ALICE_ROOT/ZDC/ZNsignalntu.root");
  } else if(SpecType == 2) {	// --- Signal for spectator protons
    file = TFile::Open("$ALICE_ROOT/ZDC/ZPsignalntu.root");
  }
  if(!file || !file->IsOpen()) {
    AliError("Opening of file failed");
    return;
  }

  TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
  Int_t nentries = (Int_t) zdcSignal->GetEntries();
  
  Float_t *entry, hitsSpec[7];
  Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
  for(pl=0;pl<125;pl++) rnd[pl] = 0;
  if(numEvents > 125) {
    AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
    numEvents = 125;
  }
  for(pl=0;pl<numEvents;pl++){
     rnd[pl] = (Int_t) (9999*gRandom->Rndm());
     if(rnd[pl] >= 9999) rnd[pl] = 9998;
     //printf("	rnd[%d] = %d\n",pl,rnd[pl]);     
  }
  // Sorting vector in ascending order with C function QSORT 
  qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
  do{
     for(i=0; i<nentries; i++){  
  	zdcSignal->GetEvent(i);
  	entry = zdcSignal->GetArgs();
  	if(entry[0] == rnd[iev]){
          for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
          for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
	  //
	  Float_t lightQ = hitsSpec[4];
	  Float_t lightC = hitsSpec[5];
	  AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
                           volume[0], volume[1], lightQ, lightC));
	  //printf("\n   Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
          //                 volume[0], volume[1], lightQ, lightC);
	  if(volume[0] < 3) {  // ZN or ZP
            pm[volume[0]-1][0] += lightC;
            pm[volume[0]-1][volume[1]] += lightQ;
	    //printf("\n   pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
	    //	(volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
	  } 
	  else { 
            if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
            else                pm[2][2] += lightQ; // ZEM 2
	    //printf("\n   pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
	  }
  	}
  	else if(entry[0] > rnd[iev]){
	  iev++;
	  continue;
	}
     }
  }while(iev<numEvents);
  
  file->Close();
  delete file;
}


//_____________________________________________________________________________
Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light, 
                                 Int_t Res) const
{
  // Evaluation of the ADC channel corresponding to the light yield Light
  Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
  //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f  ADC %d\n", Det,Quad,Light,ADCch);

  return vADCch;
}

//_____________________________________________________________________________
Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
{
  // Returns a pedestal for detector det, PM quad, channel with res.
  //
  Float_t PedValue;
  
  // Normal run
  if(fIsCalibration == 0){
    Float_t meanPed, Pedwidth;
    Int_t index=0;
    if(Det==1|| Det==2)		index = 10*(Det-1)+Quad+5*Res;	 // ZN1, ZP1
    else if(Det==3)		index = 10*(Det-1)+(Quad-1)+Res; // ZEM
    else if(Det==4|| Det==5)	index = 10*(Det-2)+Quad+5*Res+4; // ZN2, ZP2
    meanPed = fCalibData->GetMeanPed(index);
    Pedwidth = fCalibData->GetMeanPedWidth(index);
    PedValue = gRandom->Gaus(meanPed,Pedwidth);
    //
    /*printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
  	Det, Quad, index,(Int_t) PedValue); // Chiara debugging!
    */
  }
  
  // To create calibration object
  else PedValue = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
  

  return (Int_t) PedValue;
}

//_____________________________________________________________________________
AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri) 
{

  Bool_t deleteManager = kFALSE;
  
  AliCDBManager *manager = AliCDBManager::Instance();
  AliCDBStorage *defstorage = manager->GetDefaultStorage();
  
  if(!defstorage || !(defstorage->Contains("ZDC"))){ 
     AliWarning("No default storage set or default storage doesn't contain ZDC!");
     manager->SetDefaultStorage(uri);
     deleteManager = kTRUE;
  }
 
  AliCDBStorage *storage = manager->GetDefaultStorage();

  if(deleteManager){
    AliCDBManager::Instance()->UnsetDefaultStorage();
    defstorage = 0;   // the storage is killed by AliCDBManager::Instance()->Destroy()
  }

  return storage; 
}

//_____________________________________________________________________________
AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
{

  // Getting calibration object for ZDC set

  AliCDBEntry  *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Data");
  if(!entry) AliFatal("No calibration data loaded!");  

  AliZDCCalibData *calibdata = dynamic_cast<AliZDCCalibData*>  (entry->GetObject());
  if(!calibdata)  AliFatal("Wrong calibration object in calibration  file!");

  return calibdata;
}
Commit	Line	Data
8309c1ab	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	/* $Id$ */
	17
	18	///////////////////////////////////////////////////////////////////////////////
	19	// //
	20	// ZDC digitizer class //
	21	// //
	22	///////////////////////////////////////////////////////////////////////////////
	23
	24	#include <stdlib.h>
	25
	26	// --- ROOT system
	27	#include <TTree.h>
	28	#include <TFile.h>
	29	#include <TNtuple.h>
	30	#include <TRandom.h>
	31
	32	// --- AliRoot header files
	33	#include "AliLog.h"
	34	#include "AliRun.h"
	35	#include "AliHeader.h"
	36	#include "AliGenHijingEventHeader.h"
	37	#include "AliRunDigitizer.h"
	38	#include "AliRunLoader.h"
78d18275	39	#include "AliCDBManager.h"
48642b09	40	#include "AliCDBEntry.h"
8309c1ab	41	#include "AliZDCSDigit.h"
	42	#include "AliZDCDigit.h"
	43	#include "AliZDCFragment.h"
	44	#include "AliZDCDigitizer.h"
8a2624cc	45
	46	class AliCDBStorage;
	47	class AliZDCCalibData;
8309c1ab	48
	49	ClassImp(AliZDCDigitizer)
	50
	51
	52	//____________________________________________________________________________
	53	AliZDCDigitizer::AliZDCDigitizer()
	54	{
	55	// Default constructor
	56
	57	}
	58
	59	//____________________________________________________________________________
	60	AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
	61	AliDigitizer(manager)
	62	{
abf60186	63	fIsCalibration=0; //By default the simulation doesn't create calib. data
78d18275	64	// Get calibration data
7f73eb6b	65	fCalibData = GetCalibData();
31af5828	66	if(fIsCalibration!=0) printf("\t **** AliZDCDigitizer -> Creating calibration data (pedestals)\n");
78d18275	67
8309c1ab	68	}
	69
	70	//____________________________________________________________________________
	71	AliZDCDigitizer::~AliZDCDigitizer()
	72	{
	73	// Destructor
	74
	75	}
	76
	77
cc2abffd	78	//____________________________________________________________________________
	79	AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
	80	AliDigitizer()
	81	{
	82	// Copy constructor
	83
	84	for(Int_t i=0; i<6; i++){
	85	for(Int_t j=0; j<5; j++){
	86	fPMGain[i][j] = digitizer.fPMGain[i][j];
	87	}
	88	}
	89	for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
	90	fIsCalibration = digitizer.fIsCalibration;
	91	fCalibData = digitizer.fCalibData;
	92
	93	}
	94
8309c1ab	95	//____________________________________________________________________________
	96	Bool_t AliZDCDigitizer::Init()
	97	{
48642b09	98	// Initialize the digitizer
48642b09	99	// NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
7f73eb6b	100	for(Int_t j = 0; j < 5; j++){
	101	fPMGain[0][j] = 50000.;
	102	fPMGain[1][j] = 100000.;
	103	fPMGain[2][j] = 100000.;
a017f01b	104	fPMGain[3][j] = 50000.;
	105	fPMGain[4][j] = 100000.;
	106	fPMGain[5][j] = 100000.;
7f73eb6b	107	}
	108	// ADC Caen V965
	109	fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
	110	fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
8309c1ab	111
	112	return kTRUE;
	113	}
	114
	115	//____________________________________________________________________________
	116	void AliZDCDigitizer::Exec(Option_t* /option/)
	117	{
48642b09	118	// Execute digitization
8309c1ab	119
d79f8d50	120	// ------------------------------------------------------------
d79f8d50	121	// !!! 2nd ZDC set added (needed for trigger purposes!)
7f73eb6b	122	// *** 1st 3 arrays are digits from REAL (simulated) hits
	123	// *** last 2 are copied from simulated digits
	124	// --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
	125	// --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
48642b09	126	// --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
7f73eb6b	127	// --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
7f73eb6b	128	// --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
d79f8d50	129	// ------------------------------------------------------------
d79f8d50	130	Float_t pm[5][5];
8574b308	131	for(Int_t iSector1=0; iSector1<5; iSector1++)
8574b308	132	for(Int_t iSector2=0; iSector2<5; iSector2++){
8309c1ab	133	pm[iSector1][iSector2] = 0;
8309c1ab	134	}
d79f8d50	135
	136	// ------------------------------------------------------------
	137	// ### Out of time ADC added (22 channels)
	138	// --- same codification as for signal PTMs (see above)
	139	// ------------------------------------------------------------
	140	Float_t pmoot[5][5];
8574b308	141	for(Int_t iSector1=0; iSector1<5; iSector1++)
8574b308	142	for(Int_t iSector2=0; iSector2<5; iSector2++){
d79f8d50	143	pmoot[iSector1][iSector2] = 0;
d79f8d50	144	}
8309c1ab	145
	146	// impact parameter and number of spectators
	147	Float_t impPar = -1;
	148	Int_t specN = 0;
	149	Int_t specP = 0;
	150
	151	// loop over input streams
8574b308	152	for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
8309c1ab	153
	154	// get run loader and ZDC loader
	155	AliRunLoader* runLoader =
	156	AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
	157	AliLoader* loader = runLoader->GetLoader("ZDCLoader");
8574b308	158	if(!loader) continue;
8309c1ab	159
	160	// load sdigits
	161	loader->LoadSDigits();
	162	TTree* treeS = loader->TreeS();
8574b308	163	if(!treeS) continue;
8309c1ab	164	AliZDCSDigit sdigit;
	165	AliZDCSDigit* psdigit = &sdigit;
	166	treeS->SetBranchAddress("ZDC", &psdigit);
	167
	168	// loop over sdigits
8574b308	169	for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
8309c1ab	170	treeS->GetEntry(iSDigit);
7f73eb6b	171	//
8574b308	172	if(!psdigit) continue;
8574b308	173	if((sdigit.GetSector(1) < 0) \|\| (sdigit.GetSector(1) > 4)){
8309c1ab	174	AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
	175	sdigit.GetSector(0), sdigit.GetSector(1)));
	176	continue;
	177	}
7f73eb6b	178	//
48642b09	179	pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
7f73eb6b	180	/*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
48642b09	181	sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
48642b09	182	sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
abf60186	183	*/
8309c1ab	184	}
8309c1ab	185
8309c1ab	186	loader->UnloadSDigits();
	187
	188	// get the impact parameter and the number of spectators in case of hijing
8574b308	189	if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
8309c1ab	190	AliHeader* header = runLoader->GetAliRun()->GetHeader();
8574b308	191	if(!header) continue;
8309c1ab	192	AliGenEventHeader* genHeader = header->GenEventHeader();
8574b308	193	if(!genHeader) continue;
8574b308	194	if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
8309c1ab	195	impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
85a96223	196	//
	197	specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
	198	specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
78d18275	199	AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
8309c1ab	200	impPar, specN, specP));
d79f8d50	201	printf("\n\t AliZDCDigitizer -> b = %f fm, NSpecn = %d, NSpecp = %d\n", impPar, specN, specP);
8309c1ab	202	}
	203
	204	// add spectators
8574b308	205	if(impPar >= 0) {
8309c1ab	206	Int_t freeSpecN, freeSpecP;
8309c1ab	207	Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
78d18275	208	printf("\n\t AliZDCDigitizer ---- Adding signal for %d free spectator n\n",freeSpecN);
8309c1ab	209	SpectatorSignal(1, freeSpecN, pm);
78d18275	210	printf("\t AliZDCDigitizer ---- Adding signal for %d free spectator p\n\n",freeSpecP);
8309c1ab	211	SpectatorSignal(2, freeSpecP, pm);
	212	}
	213
8a2624cc	214
8309c1ab	215	// get the output run loader and loader
	216	AliRunLoader* runLoader =
	217	AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
	218	AliLoader* loader = runLoader->GetLoader("ZDCLoader");
8574b308	219	if(!loader) {
8309c1ab	220	AliError("no ZDC loader found");
	221	return;
	222	}
	223
	224	// create the output tree
	225	const char* mode = "update";
8574b308	226	if(runLoader->GetEventNumber() == 0) mode = "recreate";
8309c1ab	227	loader->LoadDigits(mode);
	228	loader->MakeTree("D");
	229	TTree* treeD = loader->TreeD();
	230	AliZDCDigit digit;
	231	AliZDCDigit* pdigit = &digit;
	232	const Int_t kBufferSize = 4000;
	233	treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
	234
	235	// Create digits
7f73eb6b	236	Int_t sector[2], sectorL[2];
d79f8d50	237	Int_t digi[2], digiL[2], digioot[2];
abf60186	238	for(sector[0]=1; sector[0]<=3; sector[0]++){
	239	for(sector[1]=0; sector[1]<5; sector[1]++){
	240	if((sector[0]==3) && ((sector[1]<1) \|\| (sector[1]>2))) continue;
8574b308	241	for(Int_t res=0; res<2; res++){
abf60186	242	digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
48642b09	243	+ Pedestal(sector[0], sector[1], res);
7f73eb6b	244	}
abf60186	245	/*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
abf60186	246	sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
d79f8d50	247	*/
abf60186	248	//
abf60186	249	new(pdigit) AliZDCDigit(sector, digi);
8309c1ab	250	treeD->Fill();
7f73eb6b	251	//
	252	// --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
	253	// --- they are copied from right ZDC digits
	254	if(sector[0]==1 \|\| sector[0]==2){
	255	sectorL[0] = sector[0]+3;
	256	sectorL[1] = sector[1];
8574b308	257	for(Int_t res=0; res<2; res++){
7f73eb6b	258	digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res)
	259	+ Pedestal(sectorL[0], sectorL[1], res);
	260	}
abf60186	261	/*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	262	sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
	263	*/
	264	//
	265	new(pdigit) AliZDCDigit(sectorL, digiL);
	266	treeD->Fill();
7f73eb6b	267	}
7f73eb6b	268	//
abf60186	269	//printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
8309c1ab	270	}
abf60186	271	}
d79f8d50	272	//
	273	// --- Adding digits for out-of-time channels after signal digits
	274	for(sector[0]=1; sector[0]<=3; sector[0]++){
	275	for(sector[1]=0; sector[1]<5; sector[1]++){
	276	if((sector[0]==3) && ((sector[1]<1) \|\| (sector[1]>2))) continue;
8574b308	277	for(Int_t res=0; res<2; res++){
d79f8d50	278	digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
	279	}
	280	/*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	281	sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
	282	*/
	283	//
	284	new(pdigit) AliZDCDigit(sector, digioot);
	285	treeD->Fill();
	286	//
	287	if(sector[0]==1 \|\| sector[0]==2){
	288	sectorL[0] = sector[0]+3;
	289	sectorL[1] = sector[1];
8574b308	290	for(Int_t res=0; res<2; res++){
d79f8d50	291	digioot[res] = Pedestal(sectorL[0], sectorL[1], res); // out-of-time ADCs
	292	}
	293	/*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	294	sectorL[0], sectorL[1], digioot[0], digioot[1]); // Chiara debugging!
	295	*/
	296	//
	297	new(pdigit) AliZDCDigit(sectorL, digioot);
	298	treeD->Fill();
	299	}
	300	//
	301	//printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
	302	}
	303	}
8309c1ab	304	// write the output tree
	305	loader->WriteDigits("OVERWRITE");
	306	loader->UnloadDigits();
	307	}
	308
	309
	310	//_____________________________________________________________________________
	311	void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
	312	Int_t &freeSpecN, Int_t &freeSpecP) const
	313	{
	314	// simulate fragmentation of spectators
	315
	316	Int_t zz[100], nn[100];
	317	AliZDCFragment frag(impPar);
8574b308	318	for(Int_t j=0; j<=99; j++){
8309c1ab	319	zz[j] =0;
	320	nn[j] =0;
	321	}
	322
	323	// Fragments generation
	324	Int_t nAlpha;
	325	frag.GenerateIMF(zz, nAlpha);
	326
	327	// Attach neutrons
	328	Int_t ztot=0;
	329	Int_t ntot=0;
	330	frag.AttachNeutrons(zz, nn, ztot, ntot);
	331	freeSpecN = specN-ntot-2*nAlpha;
	332	freeSpecP = specP-ztot-2*nAlpha;
	333	if(freeSpecN<0) freeSpecN=0;
	334	if(freeSpecP<0) freeSpecP=0;
	335	AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
	336	}
	337
	338	//_____________________________________________________________________________
	339	void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
	340	Float_t pm[3][5]) const
	341	{
	342	// add signal of the spectators
	343
	344	TFile* file = NULL;
8574b308	345	if(SpecType == 1) { // --- Signal for spectator neutrons
e689b8ea	346	file = TFile::Open("$ALICE_ROOT/ZDC/ZNsignalntu.root");
8574b308	347	} else if(SpecType == 2) { // --- Signal for spectator protons
e689b8ea	348	file = TFile::Open("$ALICE_ROOT/ZDC/ZPsignalntu.root");
8309c1ab	349	}
8574b308	350	if(!file \|\| !file->IsOpen()) {
8309c1ab	351	AliError("Opening of file failed");
	352	return;
	353	}
	354
	355	TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
	356	Int_t nentries = (Int_t) zdcSignal->GetEntries();
	357
	358	Float_t *entry, hitsSpec[7];
	359	Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
48642b09	360	for(pl=0;pl<125;pl++) rnd[pl] = 0;
8574b308	361	if(numEvents > 125) {
8309c1ab	362	AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
	363	numEvents = 125;
	364	}
	365	for(pl=0;pl<numEvents;pl++){
	366	rnd[pl] = (Int_t) (9999*gRandom->Rndm());
85a96223	367	if(rnd[pl] >= 9999) rnd[pl] = 9998;
8309c1ab	368	//printf(" rnd[%d] = %d\n",pl,rnd[pl]);
	369	}
	370	// Sorting vector in ascending order with C function QSORT
	371	qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
	372	do{
	373	for(i=0; i<nentries; i++){
	374	zdcSignal->GetEvent(i);
	375	entry = zdcSignal->GetArgs();
	376	if(entry[0] == rnd[iev]){
	377	for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
	378	for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
48642b09	379	//
8309c1ab	380	Float_t lightQ = hitsSpec[4];
8309c1ab	381	Float_t lightC = hitsSpec[5];
78d18275	382	AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
8309c1ab	383	volume[0], volume[1], lightQ, lightC));
48642b09	384	//printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
48642b09	385	// volume[0], volume[1], lightQ, lightC);
8574b308	386	if(volume[0] < 3) { // ZN or ZP
8309c1ab	387	pm[volume[0]-1][0] += lightC;
8309c1ab	388	pm[volume[0]-1][volume[1]] += lightQ;
48642b09	389	//printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
	390	// (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
	391	}
	392	else {
8574b308	393	if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
48642b09	394	else pm[2][2] += lightQ; // ZEM 2
	395	//printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
	396	}
8309c1ab	397	}
	398	else if(entry[0] > rnd[iev]){
	399	iev++;
	400	continue;
	401	}
	402	}
	403	}while(iev<numEvents);
	404
	405	file->Close();
	406	delete file;
	407	}
	408
	409
	410	//_____________________________________________________________________________
	411	Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
	412	Int_t Res) const
	413	{
48642b09	414	// Evaluation of the ADC channel corresponding to the light yield Light
8a2624cc	415	Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
78d18275	416	//printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,ADCch);
7f73eb6b	417
8a2624cc	418	return vADCch;
48642b09	419	}
8309c1ab	420
48642b09	421	//_____________________________________________________________________________
	422	Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
	423	{
8a2624cc	424	// Returns a pedestal for detector det, PM quad, channel with res.
8a2624cc	425	//
abf60186	426	Float_t PedValue;
dbc8d7fc	427
abf60186	428	// Normal run
	429	if(fIsCalibration == 0){
	430	Float_t meanPed, Pedwidth;
	431	Int_t index=0;
	432	if(Det==1\|\| Det==2) index = 10(Det-1)+Quad+5Res; // ZN1, ZP1
	433	else if(Det==3) index = 10*(Det-1)+(Quad-1)+Res; // ZEM
	434	else if(Det==4\|\| Det==5) index = 10(Det-2)+Quad+5Res+4; // ZN2, ZP2
	435	meanPed = fCalibData->GetMeanPed(index);
	436	Pedwidth = fCalibData->GetMeanPedWidth(index);
	437	PedValue = gRandom->Gaus(meanPed,Pedwidth);
	438	//
	439	/*printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
	440	Det, Quad, index,(Int_t) PedValue); // Chiara debugging!
	441	*/
	442	}
48642b09	443
7f73eb6b	444	// To create calibration object
abf60186	445	else PedValue = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
abf60186	446
dbc8d7fc	447
abf60186	448	return (Int_t) PedValue;
8309c1ab	449	}
	450
	451	//_____________________________________________________________________________
78d18275	452	AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
8309c1ab	453	{
8309c1ab	454
78d18275	455	Bool_t deleteManager = kFALSE;
48642b09	456
78d18275	457	AliCDBManager *manager = AliCDBManager::Instance();
78d18275	458	AliCDBStorage *defstorage = manager->GetDefaultStorage();
48642b09	459
78d18275	460	if(!defstorage \|\| !(defstorage->Contains("ZDC"))){
	461	AliWarning("No default storage set or default storage doesn't contain ZDC!");
	462	manager->SetDefaultStorage(uri);
	463	deleteManager = kTRUE;
	464	}
	465
	466	AliCDBStorage *storage = manager->GetDefaultStorage();
	467
	468	if(deleteManager){
	469	AliCDBManager::Instance()->UnsetDefaultStorage();
	470	defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
	471	}
	472
	473	return storage;
	474	}
48642b09	475
78d18275	476	//_____________________________________________________________________________
7f73eb6b	477	AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
78d18275	478	{
4fda3ba1	479
	480	// Getting calibration object for ZDC set
	481
	482	AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Data");
457a440d	483	if(!entry) AliFatal("No calibration data loaded!");
	484
	485	AliZDCCalibData calibdata = dynamic_cast<AliZDCCalibData> (entry->GetObject());
	486	if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
8309c1ab	487
78d18275	488	return calibdata;
8309c1ab	489	}
4fda3ba1	490