[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)
{

  // Get calibration data
  fCalibData = GetCalibData(); 

}

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

}


//____________________________________________________________________________
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

  Float_t pm[5][5]; // !!! 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!
  
  for (Int_t iSector1=0; iSector1<5; iSector1++) 
    for (Int_t iSector2=0; iSector2<5; iSector2++) {
      pm[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];
  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();
    }

  // 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("$ALICE/$ALICE_LEVEL/ZDC/ZNsignalntu.root");
  } else if (SpecType == 2) {	// --- Signal for spectator protons
    file = TFile::Open("$ALICE/$ALICE_LEVEL/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 meanPed;
  if(Det != 3) meanPed = fCalibData->GetMeanPed(10*(Det-1)+Quad+5*Res);
  else         meanPed = fCalibData->GetMeanPed(10*(Det-1)+Quad+1*Res);
  
  //printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
  //	Det, Quad, Res,10*(Det-1)+Quad+5*Res,(Int_t) meanPed); // Chiara debugging!
  
  // To create calibration object
  /*Float_t meanPed;
  meanPed = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
  */

  return (Int_t) meanPed;
}

//_____________________________________________________________________________
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");
  AliZDCCalibData *calibdata = (AliZDCCalibData*) entry->GetObject();

  if (!calibdata)  AliWarning("No calibration data from calibration database !");

  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	{
78d18275	63
78d18275	64	// Get calibration data
7f73eb6b	65	fCalibData = GetCalibData();
78d18275	66
8309c1ab	67	}
	68
	69	//____________________________________________________________________________
	70	AliZDCDigitizer::~AliZDCDigitizer()
	71	{
	72	// Destructor
	73
	74	}
	75
	76
	77	//____________________________________________________________________________
	78	Bool_t AliZDCDigitizer::Init()
	79	{
48642b09	80	// Initialize the digitizer
48642b09	81	// NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
7f73eb6b	82	for(Int_t j = 0; j < 5; j++){
	83	fPMGain[0][j] = 50000.;
	84	fPMGain[1][j] = 100000.;
	85	fPMGain[2][j] = 100000.;
a017f01b	86	fPMGain[3][j] = 50000.;
	87	fPMGain[4][j] = 100000.;
	88	fPMGain[5][j] = 100000.;
7f73eb6b	89	}
	90	// ADC Caen V965
	91	fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
	92	fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
8309c1ab	93
	94	return kTRUE;
	95	}
	96
	97	//____________________________________________________________________________
	98	void AliZDCDigitizer::Exec(Option_t* /option/)
	99	{
48642b09	100	// Execute digitization
8309c1ab	101
7f73eb6b	102	Float_t pm[5][5]; // !!! 2nd ZDC set added (needed for trigger purposes!)
	103	// *** 1st 3 arrays are digits from REAL (simulated) hits
	104	// *** last 2 are copied from simulated digits
	105	// --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
	106	// --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
48642b09	107	// --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
7f73eb6b	108	// --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
	109	// --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
	110
	111	for (Int_t iSector1=0; iSector1<5; iSector1++)
	112	for (Int_t iSector2=0; iSector2<5; iSector2++) {
8309c1ab	113	pm[iSector1][iSector2] = 0;
8309c1ab	114	}
8309c1ab	115
	116	// impact parameter and number of spectators
	117	Float_t impPar = -1;
	118	Int_t specN = 0;
	119	Int_t specP = 0;
	120
	121	// loop over input streams
7f73eb6b	122	for (Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++) {
8309c1ab	123
	124	// get run loader and ZDC loader
	125	AliRunLoader* runLoader =
	126	AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
	127	AliLoader* loader = runLoader->GetLoader("ZDCLoader");
	128	if (!loader) continue;
	129
	130	// load sdigits
	131	loader->LoadSDigits();
	132	TTree* treeS = loader->TreeS();
	133	if (!treeS) continue;
	134	AliZDCSDigit sdigit;
	135	AliZDCSDigit* psdigit = &sdigit;
	136	treeS->SetBranchAddress("ZDC", &psdigit);
	137
	138	// loop over sdigits
7f73eb6b	139	for (Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++) {
8309c1ab	140	treeS->GetEntry(iSDigit);
7f73eb6b	141	//
8309c1ab	142	if (!psdigit) continue;
8309c1ab	143	if ((sdigit.GetSector(1) < 0) \|\| (sdigit.GetSector(1) > 4)) {
	144	AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
	145	sdigit.GetSector(0), sdigit.GetSector(1)));
	146	continue;
	147	}
7f73eb6b	148	//
48642b09	149	pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
7f73eb6b	150	/*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
48642b09	151	sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
48642b09	152	sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
7f73eb6b	153	*/
8309c1ab	154	}
8309c1ab	155
8309c1ab	156	loader->UnloadSDigits();
	157
	158	// get the impact parameter and the number of spectators in case of hijing
	159	if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
	160	AliHeader* header = runLoader->GetAliRun()->GetHeader();
	161	if (!header) continue;
	162	AliGenEventHeader* genHeader = header->GenEventHeader();
	163	if (!genHeader) continue;
	164	if (!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
	165	impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
85a96223	166	//
	167	specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
	168	specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
78d18275	169	AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
8309c1ab	170	impPar, specN, specP));
7f73eb6b	171	printf("\n\t AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n", impPar, specN, specP);
8309c1ab	172	}
	173
	174	// add spectators
	175	if (impPar >= 0) {
	176	Int_t freeSpecN, freeSpecP;
	177	Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
78d18275	178	printf("\n\t AliZDCDigitizer ---- Adding signal for %d free spectator n\n",freeSpecN);
8309c1ab	179	SpectatorSignal(1, freeSpecN, pm);
78d18275	180	printf("\t AliZDCDigitizer ---- Adding signal for %d free spectator p\n\n",freeSpecP);
8309c1ab	181	SpectatorSignal(2, freeSpecP, pm);
	182	}
	183
8a2624cc	184
8309c1ab	185	// get the output run loader and loader
	186	AliRunLoader* runLoader =
	187	AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
	188	AliLoader* loader = runLoader->GetLoader("ZDCLoader");
	189	if (!loader) {
	190	AliError("no ZDC loader found");
	191	return;
	192	}
	193
	194	// create the output tree
	195	const char* mode = "update";
	196	if (runLoader->GetEventNumber() == 0) mode = "recreate";
	197	loader->LoadDigits(mode);
	198	loader->MakeTree("D");
	199	TTree* treeD = loader->TreeD();
	200	AliZDCDigit digit;
	201	AliZDCDigit* pdigit = &digit;
	202	const Int_t kBufferSize = 4000;
	203	treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
	204
	205	// Create digits
7f73eb6b	206	Int_t sector[2], sectorL[2];
	207	Int_t digi[2], digiL[2];
	208	for (sector[0]=1; sector[0]<=3; sector[0]++)
	209	for (sector[1]=0; sector[1]<5; sector[1]++) {
	210	if ((sector[0]==3) && ((sector[1]<1) \|\| (sector[1]>2))) continue;
	211	for (Int_t res=0; res<2; res++){
48642b09	212	digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
48642b09	213	+ Pedestal(sector[0], sector[1], res);
7f73eb6b	214	}
	215	//printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	216	// sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
8309c1ab	217	new(pdigit) AliZDCDigit(sector, digi);
8309c1ab	218	treeD->Fill();
7f73eb6b	219	//
	220	// --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
	221	// --- they are copied from right ZDC digits
	222	if(sector[0]==1 \|\| sector[0]==2){
	223	sectorL[0] = sector[0]+3;
	224	sectorL[1] = sector[1];
	225	for (Int_t res=0; res<2; res++){
	226	digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res)
	227	+ Pedestal(sectorL[0], sectorL[1], res);
	228	}
	229	//printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
	230	// sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
	231	new(pdigit) AliZDCDigit(sectorL, digiL);
	232	}
	233	//
	234	treeD->Fill();
8309c1ab	235	}
	236
	237	// write the output tree
	238	loader->WriteDigits("OVERWRITE");
	239	loader->UnloadDigits();
	240	}
	241
	242
	243	//_____________________________________________________________________________
	244	void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
	245	Int_t &freeSpecN, Int_t &freeSpecP) const
	246	{
	247	// simulate fragmentation of spectators
	248
	249	Int_t zz[100], nn[100];
	250	AliZDCFragment frag(impPar);
	251	for (Int_t j=0; j<=99; j++){
	252	zz[j] =0;
	253	nn[j] =0;
	254	}
	255
	256	// Fragments generation
	257	Int_t nAlpha;
	258	frag.GenerateIMF(zz, nAlpha);
	259
	260	// Attach neutrons
	261	Int_t ztot=0;
	262	Int_t ntot=0;
	263	frag.AttachNeutrons(zz, nn, ztot, ntot);
	264	freeSpecN = specN-ntot-2*nAlpha;
	265	freeSpecP = specP-ztot-2*nAlpha;
	266	if(freeSpecN<0) freeSpecN=0;
	267	if(freeSpecP<0) freeSpecP=0;
	268	AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
	269	}
	270
	271	//_____________________________________________________________________________
	272	void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
	273	Float_t pm[3][5]) const
	274	{
	275	// add signal of the spectators
	276
	277	TFile* file = NULL;
	278	if (SpecType == 1) { // --- Signal for spectator neutrons
	279	file = TFile::Open("$ALICE/$ALICE_LEVEL/ZDC/ZNsignalntu.root");
	280	} else if (SpecType == 2) { // --- Signal for spectator protons
	281	file = TFile::Open("$ALICE/$ALICE_LEVEL/ZDC/ZPsignalntu.root");
	282	}
	283	if (!file \|\| !file->IsOpen()) {
	284	AliError("Opening of file failed");
	285	return;
	286	}
	287
	288	TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
	289	Int_t nentries = (Int_t) zdcSignal->GetEntries();
	290
	291	Float_t *entry, hitsSpec[7];
	292	Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
48642b09	293	for(pl=0;pl<125;pl++) rnd[pl] = 0;
8309c1ab	294	if (numEvents > 125) {
	295	AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
	296	numEvents = 125;
	297	}
	298	for(pl=0;pl<numEvents;pl++){
	299	rnd[pl] = (Int_t) (9999*gRandom->Rndm());
85a96223	300	if(rnd[pl] >= 9999) rnd[pl] = 9998;
8309c1ab	301	//printf(" rnd[%d] = %d\n",pl,rnd[pl]);
	302	}
	303	// Sorting vector in ascending order with C function QSORT
	304	qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
	305	do{
	306	for(i=0; i<nentries; i++){
	307	zdcSignal->GetEvent(i);
	308	entry = zdcSignal->GetArgs();
	309	if(entry[0] == rnd[iev]){
	310	for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
	311	for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
48642b09	312	//
8309c1ab	313	Float_t lightQ = hitsSpec[4];
8309c1ab	314	Float_t lightC = hitsSpec[5];
78d18275	315	AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
8309c1ab	316	volume[0], volume[1], lightQ, lightC));
48642b09	317	//printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
48642b09	318	// volume[0], volume[1], lightQ, lightC);
8309c1ab	319	if (volume[0] < 3) { // ZN or ZP
	320	pm[volume[0]-1][0] += lightC;
	321	pm[volume[0]-1][volume[1]] += lightQ;
48642b09	322	//printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
	323	// (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
	324	}
	325	else {
	326	if (volume[1] == 1) pm[2][1] += lightC; // ZEM 1
	327	else pm[2][2] += lightQ; // ZEM 2
	328	//printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
	329	}
8309c1ab	330	}
	331	else if(entry[0] > rnd[iev]){
	332	iev++;
	333	continue;
	334	}
	335	}
	336	}while(iev<numEvents);
	337
	338	file->Close();
	339	delete file;
	340	}
	341
	342
	343	//_____________________________________________________________________________
	344	Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
	345	Int_t Res) const
	346	{
48642b09	347	// Evaluation of the ADC channel corresponding to the light yield Light
8a2624cc	348	Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
78d18275	349	//printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,ADCch);
7f73eb6b	350
8a2624cc	351	return vADCch;
48642b09	352	}
8309c1ab	353
48642b09	354	//_____________________________________________________________________________
	355	Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
	356	{
8a2624cc	357	// Returns a pedestal for detector det, PM quad, channel with res.
8a2624cc	358	//
dbc8d7fc	359	Float_t meanPed;
78d18275	360	if(Det != 3) meanPed = fCalibData->GetMeanPed(10(Det-1)+Quad+5Res);
78d18275	361	else meanPed = fCalibData->GetMeanPed(10(Det-1)+Quad+1Res);
dbc8d7fc	362
78d18275	363	//printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
78d18275	364	// Det, Quad, Res,10(Det-1)+Quad+5Res,(Int_t) meanPed); // Chiara debugging!
48642b09	365
7f73eb6b	366	// To create calibration object
dbc8d7fc	367	/*Float_t meanPed;
7f73eb6b	368	meanPed = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
dbc8d7fc	369	*/
dbc8d7fc	370
48642b09	371	return (Int_t) meanPed;
8309c1ab	372	}
	373
	374	//_____________________________________________________________________________
78d18275	375	AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
8309c1ab	376	{
8309c1ab	377
78d18275	378	Bool_t deleteManager = kFALSE;
48642b09	379
78d18275	380	AliCDBManager *manager = AliCDBManager::Instance();
78d18275	381	AliCDBStorage *defstorage = manager->GetDefaultStorage();
48642b09	382
78d18275	383	if(!defstorage \|\| !(defstorage->Contains("ZDC"))){
	384	AliWarning("No default storage set or default storage doesn't contain ZDC!");
	385	manager->SetDefaultStorage(uri);
	386	deleteManager = kTRUE;
	387	}
	388
	389	AliCDBStorage *storage = manager->GetDefaultStorage();
	390
	391	if(deleteManager){
	392	AliCDBManager::Instance()->UnsetDefaultStorage();
	393	defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
	394	}
	395
	396	return storage;
	397	}
48642b09	398
78d18275	399	//_____________________________________________________________________________
7f73eb6b	400	AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
78d18275	401	{
4fda3ba1	402
	403	// Getting calibration object for ZDC set
	404
	405	AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Data");
78d18275	406	AliZDCCalibData calibdata = (AliZDCCalibData) entry->GetObject();
4fda3ba1	407
4fda3ba1	408	if (!calibdata) AliWarning("No calibration data from calibration database !");
8309c1ab	409
78d18275	410	return calibdata;
8309c1ab	411	}
4fda3ba1	412