HMPID/AliHMPIDv1.cxx

   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
  17 #include "AliHMPIDv1.h"     //class header
  18 #include "AliHMPIDParam.h"  //CreateMaterials()
  19 #include "AliHMPIDHit.h"    //Hits2SDigs(),StepManager()
  20 #include "AliHMPIDDigit.h"  //CreateMaterials()
  21 #include "AliRawReader.h"  //Raw2SDigits()
  22 #include <TParticle.h>     //Hits2SDigits()
  23 #include <TRandom.h>
  24 #include <TVirtualMC.h>    //StepManager() for gMC
  25 #include <TPDGCode.h>      //StepHistory()
  26 #include <AliStack.h>      //StepManager(),Hits2SDigits()
  27 #include <AliLoader.h>        //Hits2SDigits()
  28 #include <AliRunLoader.h>     //Hits2SDigits()
  29 #include <AliConst.h>
  30 #include <AliPDG.h>
  31 #include <AliMC.h>            //StepManager()
  32 #include <AliRawDataHeader.h> //Digits2Raw()
  33 #include <AliDAQ.h>           //Digits2Raw()
  34 #include <AliRun.h>           //CreateMaterials()
  35 #include <AliMagF.h>          //CreateMaterials()
  36 #include <TGeoManager.h>      //CreateGeometry()
  37 #include <TMultiGraph.h>      //Optics()
  38 #include <TGraph.h>           //Optics()
  39 #include <TLegend.h>          //Optics()
  40 #include <TCanvas.h>          //Optics()
  41 #include <TF2.h>              //CreateMaterials()
  42 #include <AliCDBManager.h>    //CreateMaterials()
  43 #include <AliCDBEntry.h>      //CreateMaterials()
  44
  45 ClassImp(AliHMPIDv1)
  46 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  47 void AliHMPIDv1::AddAlignableVolumes()const
  48 {
  49 // Associates the symbolic volume name with the corresponding volume path. Interface methode from AliModule ivoked from AliMC
  50 // Arguments: none
  51 //   Returns: none
  52   for(Int_t i=0;i<7;i++)
  53     gGeoManager->SetAlignableEntry(Form("/HMPID/Chamber%i",i),Form("ALIC_1/HMPID_%i",i));
  54 }
  55 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  56 void AliHMPIDv1::CreateMaterials()
  57 {
  58 // Definition of available HMPID materials
  59 // Arguments: none
  60 //   Returns: none
  61   AliDebug(1,"Start v1 HMPID.");
  62
  63   Float_t emin=5.5,emax=8.5;         //Photon energy range,[eV]
  64
  65   TF2 *pRaIF=new TF2("RidxRad","sqrt(1+0.554*(1239.84/x)^2/((1239.84/x)^2-5796)-0.0005*(y-20))"                                       ,emin,emax,0,50); //DiMauro mail temp 0-50 degrees C
  66   TF1 *pWiIF=new TF1("RidxWin","sqrt(1+46.411/(10.666*10.666-x*x)+228.71/(18.125*18.125-x*x))"                                        ,emin,emax);      //SiO2 idx TDR p.35
  67   TF1 *pGaIF=new TF1("RidxGap","1+0.12489e-6/(2.62e-4 - x*x/1239.84/1239.84)"                                                         ,emin,emax);      //?????? from where
  68
  69   TF1 *pRaAF=new TF1("RabsRad","(x<7.8)*(gaus+gaus(3))+(x>=7.8)*0.0001"                                                               ,emin,emax);  //fit from DiMauro data 28.10.03
  70   pRaAF->SetParameters(3.20491e16,-0.00917890,0.742402,3035.37,4.81171,0.626309);
  71   TF1 *pWiAF=new TF1("RabsWin","(x<8.2)*(818.8638-301.0436*x+36.89642*x*x-1.507555*x*x*x)+(x>=8.2)*0.0001"                            ,emin,emax);  //fit from DiMauro data 28.10.03
  72   TF1 *pGaAF=new TF1("RabsGap","(x<7.75)*6512.399+(x>=7.75)*3.90743e-2/(-1.655279e-1+6.307392e-2*x-8.011441e-3*x*x+3.392126e-4*x*x*x)",emin,emax);  //????? from where
  73
  74   TF1 *pQeF =new TF1("Qe"    ,"0+(x>6.07267)*0.344811*(1-exp(-1.29730*(x-6.07267)))"                                                  ,emin,emax);  //fit from DiMauro data 28.10.03
  75
  76   const Int_t kNbins=30;       //number of photon energy points
  77   Float_t aEckov [kNbins];
  78   Float_t aAbsRad[kNbins], aAbsWin[kNbins], aAbsGap[kNbins], aAbsMet[kNbins];
  79   Float_t aIdxRad[kNbins], aIdxWin[kNbins], aIdxGap[kNbins], aIdxMet[kNbins], aIdxPc[kNbins];
  80   Float_t                                                    aQeAll [kNbins], aQePc [kNbins];
  81
  82   for(Int_t i=0;i<kNbins;i++){
  83     Float_t eV=emin+0.1*i;  //Ckov energy in eV
  84     aEckov [i] =1e-9*eV;    //Ckov energy in GeV
  85     aAbsRad[i]=pRaAF->Eval(eV); aIdxRad[i]=1.292;//pRaIF->Eval(eV,20);      //Simulation for 20 degress C
  86     aAbsWin[i]=pWiAF->Eval(eV); aIdxWin[i]=1.5787;//pWiIF->Eval(eV);
  87     aAbsGap[i]=pGaAF->Eval(eV); aIdxGap[i]=1.0005;//pGaIF->Eval(eV);    aQeAll[i] =1;                     //QE for all other materials except for PC must be 1.
  88     aAbsMet[i] =0.0001;                aIdxMet[i]=0;                                             //metal ref idx must be 0 in order to reflect photon
  89                                        aIdxPc [i]=1;           aQePc [i]=pQeF->Eval(eV);         //PC ref idx must be 1 in order to apply photon to QE conversion
  90
  91   }
  92
  93 //data from PDG booklet 2002     density [gr/cm^3] rad len [cm] abs len [cm]
  94   Float_t   aAir[4]={12,14,16,36}    ,   zAir[4]={6,7,8,18} ,   wAir[4]={0.000124,0.755267,0.231781,0.012827} , dAir=0.00120479; Int_t nAir=4;//mixture 0.9999999
  95   Float_t aC6F14[2]={ 12.01 , 18.99} , zC6F14[2]={ 6 , 9}   , wC6F14[2]={6 , 14} , dC6F14=1.68    ; Int_t nC6F14=-2;
  96   Float_t  aSiO2[2]={ 28.09 , 15.99} ,  zSiO2[2]={14 , 8}   ,  wSiO2[2]={1 ,  2} ,  dSiO2=2.64    ; Int_t  nSiO2=-2;
  97   Float_t   aCH4[2]={ 12.01 ,  1.01} ,   zCH4[2]={ 6 , 1}   ,   wCH4[2]={1 ,  4} ,   dCH4=7.17e-4 ; Int_t   nCH4=-2;
  98   Float_t   aCsI[2]={132.90 ,126.90} ,   zCsI[2]={55 ,53}   ,   wCsI[2]={1 ,  1} ,   dCsI=0.1     ; Int_t   nCsI=-2;
  99   Float_t     aRoha= 12.01 ,               zRoha=  6 ,                              dRoha=  0.10 , radRoha= 18.80 , absRoha=  86.3/dRoha; //special material- quazi carbon
 100   Float_t       aCu= 63.55 ,                 zCu= 29 ,                                dCu=  8.96 ,   radCu=  1.43 ,   absCu= 134.9/dCu  ;
 101   Float_t        aW=183.84 ,                  zW= 74 ,                                 dW= 19.30 ,    radW=  0.35 ,    absW= 185.0/dW   ;
 102   Float_t       aAl= 26.98 ,                 zAl= 13 ,                                dAl=  2.70 ,   radAl=  8.90 ,   absAl= 106.4/dAl  ;
 103
 104     Int_t   matId=0;                           //tmp material id number
 105     Int_t   unsens =  0, sens=1;               //sensitive or unsensitive medium
 106     Int_t   itgfld = gAlice->Field()->Integ(); //type of field intergration 0 no field -1 user in guswim 1 Runge Kutta 2 helix 3 const field along z
 107     Float_t maxfld = gAlice->Field()->Max();   //max field value
 108     Float_t tmaxfd = -10.0;                    //max deflection angle due to magnetic field in one step
 109     Float_t deemax = - 0.2;                    //max fractional energy loss in one step
 110     Float_t stemax = - 0.1;                    //mas step allowed [cm]
 111     Float_t epsil  =   0.001;                  //abs tracking precision [cm]
 112     Float_t stmin  = - 0.001;                  //min step size [cm] in continius process transport, negative value: choose it automatically
 113     AliMixture(++matId,"Air"  ,aAir  ,zAir  ,dAir  ,nAir  ,wAir  ); AliMedium(kAir  ,"Air"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 114     AliMixture(++matId,"C6F14",aC6F14,zC6F14,dC6F14,nC6F14,wC6F14); AliMedium(kC6F14,"C6F14",matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 115     AliMixture(++matId,"SiO2" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kSiO2 ,"SiO2" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 116     AliMixture(++matId,"CH4"  ,aCH4  ,zCH4  ,dCH4  ,nCH4  ,wCH4  ); AliMedium(kCH4  ,"CH4"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 117     AliMixture(++matId,"CsI"  ,aCsI  ,zCsI  ,dCsI  ,nCsI  ,wCsI  ); AliMedium(kCsI  ,"CsI"  ,matId,   sens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);//sensitive
 118
 119     AliMaterial(++matId,"Roha",aRoha,zRoha,dRoha,radRoha,absRoha);  AliMedium(kRoha,"Roha", matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 120     AliMaterial(++matId,"Cu"  ,aCu  ,zCu  ,dCu  ,radCu  ,absCu  );  AliMedium(kCu  ,"Cu"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 121     AliMaterial(++matId,"W"   ,aW   ,zW   ,dW   ,radW   ,absW   );  AliMedium(kW   ,"W"   , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 122     AliMaterial(++matId,"Al"  ,aAl  ,zAl  ,dAl  ,radAl  ,absAl  );  AliMedium(kAl  ,"Al"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
 123
 124     gMC->SetCerenkov((*fIdtmed)[kC6F14]    , kNbins, aEckov, aAbsRad  , aQeAll , aIdxRad );
 125     gMC->SetCerenkov((*fIdtmed)[kSiO2]     , kNbins, aEckov, aAbsWin  , aQeAll , aIdxWin );
 126     gMC->SetCerenkov((*fIdtmed)[kCH4]      , kNbins, aEckov, aAbsGap  , aQeAll , aIdxGap );
 127     gMC->SetCerenkov((*fIdtmed)[kCu]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );
 128     gMC->SetCerenkov((*fIdtmed)[kW]        , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet ); //n=0 means reflect photons
 129     gMC->SetCerenkov((*fIdtmed)[kCsI]      , kNbins, aEckov, aAbsMet  , aQePc  , aIdxPc  ); //n=1 means convert photons
 130     gMC->SetCerenkov((*fIdtmed)[kAl]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );
 131
 132   delete pRaAF;delete pWiAF;delete pGaAF; delete pRaIF; delete pWiIF; delete pGaIF; delete pQeF;
 133     AliDebug(1,"Stop v1 HMPID.");
 134
 135   TString ttl=GetTitle(); if(!ttl.Contains("ShowOptics")) return;              //user didn't aks to plot optical curves
 136
 137   const Double_t kWidth=0.25,kHeight=0.2;
 138   const Int_t kRadM=24 , kRadC=kRed;
 139   const Int_t kWinM=26 , kWinC=kBlue;
 140   const Int_t kGapM=25 , kGapC=kGreen;
 141   const Int_t kPcM = 2 , kPcC =kMagenta;
 142
 143   Float_t aTraRad[kNbins],aTraWin[kNbins],aTraGap[kNbins],aTraTot[kNbins];
 144   for(Int_t i=0;i<kNbins;i++){//calculate probability for photon to survive during transversing a volume of material with absorption length
 145     aTraRad[i]=TMath::Exp(-AliHMPIDDigit::SizeRad()/ (aAbsRad[i]+0.0001)); //radiator
 146     aTraWin[i]=TMath::Exp(-AliHMPIDDigit::SizeWin()/ (aAbsWin[i] +0.0001)); //window
 147     aTraGap[i]=TMath::Exp(-AliHMPIDDigit::SizeGap()/ (aAbsGap[i]  +0.0001)); //from window to PC
 148     aTraTot[i]=aTraRad[i]*aTraWin[i]*aTraGap[i]*aQePc[i];
 149   }
 150
 151   TGraph *pRaAG=new TGraph(kNbins,aEckov,aAbsRad);pRaAG->SetMarkerStyle(kRadM);pRaAG->SetMarkerColor(kRadC);
 152   TGraph *pRaIG=new TGraph(kNbins,aEckov,aIdxRad);pRaIG->SetMarkerStyle(kRadM);pRaIG->SetMarkerColor(kRadC);
 153   TGraph *pRaTG=new TGraph(kNbins,aEckov,aTraRad);pRaTG->SetMarkerStyle(kRadM);pRaTG->SetMarkerColor(kRadC);
 154
 155   TGraph *pWiAG=new TGraph(kNbins,aEckov,aAbsWin);pWiAG->SetMarkerStyle(kWinM);pWiAG->SetMarkerColor(kWinC);
 156   TGraph *pWiIG=new TGraph(kNbins,aEckov,aIdxWin);pWiIG->SetMarkerStyle(kWinM);pWiIG->SetMarkerColor(kWinC);
 157   TGraph *pWiTG=new TGraph(kNbins,aEckov,aTraWin);pWiTG->SetMarkerStyle(kWinM);pWiTG->SetMarkerColor(kWinC);
 158
 159   TGraph *pGaAG=new TGraph(kNbins,aEckov,aAbsGap);pGaAG->SetMarkerStyle(kGapM);pGaAG->SetMarkerColor(kGapC);
 160   TGraph *pGaIG=new TGraph(kNbins,aEckov,aIdxGap);pGaIG->SetMarkerStyle(kGapM);pGaIG->SetMarkerColor(kGapC);
 161   TGraph *pGaTG=new TGraph(kNbins,aEckov,aTraGap);pGaTG->SetMarkerStyle(kGapM);pGaTG->SetMarkerColor(kGapC);
 162
 163   TGraph *pQeG =new TGraph(kNbins,aEckov,aQePc);  pQeG  ->SetMarkerStyle(kPcM );pQeG->SetMarkerColor(kPcC);
 164   TGraph *pToG =new TGraph(kNbins,aEckov,aTraTot);pToG  ->SetMarkerStyle(30)   ;pToG->SetMarkerColor(kYellow);
 165
 166   TMultiGraph *pIdxMG=new TMultiGraph("idx","Ref index;E_{#check{C}} [GeV]");
 167   TMultiGraph *pAbsMG=new TMultiGraph("abs","Absorption [cm];E_{#check{C}} [GeV]");
 168   TMultiGraph *pTraMG=new TMultiGraph("tra","Transmission;E_{#check{C}} [GeV]");    TLegend *pTraLe=new TLegend(0.2,0.4,0.2+kWidth,0.4+kHeight);
 169   pAbsMG->Add(pRaAG);  pIdxMG->Add(pRaIG);     pTraMG->Add(pRaTG);     pTraLe->AddEntry(pRaTG, "Rad", "p");
 170   pAbsMG->Add(pWiAG);  pIdxMG->Add(pWiIG);     pTraMG->Add(pWiTG);     pTraLe->AddEntry(pWiTG, "Win", "p");
 171   pAbsMG->Add(pGaAG);  pIdxMG->Add(pGaIG);     pTraMG->Add(pGaTG);     pTraLe->AddEntry(pGaTG, "Gap", "p");
 172                                                pTraMG->Add(pToG);      pTraLe->AddEntry(pToG,  "Tot", "p");
 173                                                pTraMG->Add(pQeG);      pTraLe->AddEntry(pQeG,   "QE" , "p");
 174   TCanvas *pC=new TCanvas("c1","HMPID optics to check",1100,900);  pC->Divide(2,2);
 175   pC->cd(1);                    pIdxMG->Draw("AP");
 176   pC->cd(2);  gPad->SetLogy();  pAbsMG->Draw("AP");
 177   pC->cd(3);                    pTraLe->Draw();
 178   pC->cd(4);                    pTraMG->Draw("AP");
 179 }//void AliHMPID::CreateMaterials()
 180 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 181 void AliHMPIDv1::CreateGeometry()
 182 {
 183 //Creates detailed geometry simulation (currently GEANT volumes tree)
 184   AliDebug(1,"Start main.");
 185   if(!gMC->IsRootGeometrySupported()) return;
 186
 187   Double_t cm=1,mm=0.1*cm,mkm=0.001*mm,dx,dy,dz;//default is cm
 188
 189   TGeoVolume *pRich=gGeoManager->MakeBox("HMPID",gGeoManager->GetMedium("HMPID_CH4"),dx=(6*mm+1681*mm+6*mm)/2,  //main HMPID volume
 190                                                                                    dy=(6*mm+1466*mm+6*mm)/2,
 191                                                                                    dz=(80*mm+40*mm)*2/2);     //x,y taken from 2033P1  z from p84 TDR
 192   const Double_t kAngHor=19.5; //  horizontal angle between chambers  19.5 grad
 193   const Double_t kAngVer=20;   //  vertical angle between chambers    20   grad
 194   const Double_t kAngCom=30;   //  common HMPID rotation with respect to x axis  30   grad
 195   const Double_t trans[3]={490,0,0}; //center of the chamber is on window-gap surface
 196   for(Int_t iCh=0;iCh<7;iCh++){//place 7 chambers
 197     TGeoHMatrix *pMatrix=new TGeoHMatrix;
 198     pMatrix->RotateY(90);           //rotate around y since initial position is in XY plane -> now in YZ plane
 199     pMatrix->SetTranslation(trans); //now plane in YZ is shifted along x
 200     switch(iCh){
 201       case 0:                pMatrix->RotateY(kAngHor);  pMatrix->RotateZ(-kAngVer);  break; //right and down
 202       case 1:                                            pMatrix->RotateZ(-kAngVer);  break; //down
 203       case 2:                pMatrix->RotateY(kAngHor);                               break; //right
 204       case 3:                                                                         break; //no rotation
 205       case 4:                pMatrix->RotateY(-kAngHor);                              break; //left
 206       case 5:                                            pMatrix->RotateZ(kAngVer);   break; //up
 207       case 6:                pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer);   break; //left and up
 208     }
 209     pMatrix->RotateZ(kAngCom);     //apply common rotation  in XY plane
 210     gGeoManager->GetVolume("ALIC")->AddNode(pRich,iCh,pMatrix);
 211   }
 212
 213   Float_t par[3];
 214   Int_t matrixIdReturn=0; //matrix id returned by AliMatrix
 215 //Pad Panel frame  6 sectors
 216   par[0]=648*mm/2;par[1]=  411*mm/2;par[2]=40  *mm/2;gMC->Gsvolu("Rppf"     ,"BOX ",(*fIdtmed)[kAl]  ,par,3);//PPF 2001P2 inner size of the slab by 1mm more
 217   par[0]=181*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("RppfLarge","BOX ",(*fIdtmed)[kAir] ,par,3);//large whole
 218   par[0]=114*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("RppfSmall","BOX ",(*fIdtmed)[kAir] ,par,3);//small whole
 219   par[0]=644*mm/2;par[1]=  407*mm/2;par[2]= 1.7*mm/2;gMC->Gsvolu("Rpc"      ,"BOX ",(*fIdtmed)[kCsI] ,par,3);//by 0.2 mm more then actual size (PCB 2006P1)
 220
 221   gMC->Gspos("Rppf",0,"HMPID",    -335*mm,      -433*mm,  8*cm+20*mm,  0,"ONLY");//F1 2040P1 z p.84 TDR
 222   gMC->Gspos("Rppf",1,"HMPID",    +335*mm,      -433*mm,  8*cm+20*mm,  0,"ONLY");
 223   gMC->Gspos("Rppf",2,"HMPID",    -335*mm,         0*mm,  8*cm+20*mm,  0,"ONLY");
 224   gMC->Gspos("Rppf",3,"HMPID",    +335*mm,         0*mm,  8*cm+20*mm,  0,"ONLY");
 225   gMC->Gspos("Rppf",4,"HMPID",    -335*mm,      +433*mm,  8*cm+20*mm,  0,"ONLY");
 226   gMC->Gspos("Rppf",5,"HMPID",    +335*mm,      +433*mm,  8*cm+20*mm,  0,"ONLY");
 227     gMC->Gspos("Rpc"      ,1,"Rppf",       0*mm,         0*mm,   -19.15*mm,  0,"ONLY");//PPF 2001P2
 228     gMC->Gspos("RppfLarge",1,"Rppf",  -224.5*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 229     gMC->Gspos("RppfLarge",2,"Rppf",  -224.5*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 230     gMC->Gspos("RppfLarge",3,"Rppf",  -224.5*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 231     gMC->Gspos("RppfLarge",4,"Rppf",  -224.5*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 232     gMC->Gspos("RppfSmall",1,"Rppf",  - 65.0*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 233     gMC->Gspos("RppfSmall",2,"Rppf",  - 65.0*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 234     gMC->Gspos("RppfSmall",3,"Rppf",  - 65.0*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 235     gMC->Gspos("RppfSmall",4,"Rppf",  - 65.0*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 236     gMC->Gspos("RppfSmall",5,"Rppf",  + 65.0*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 237     gMC->Gspos("RppfSmall",6,"Rppf",  + 65.0*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 238     gMC->Gspos("RppfSmall",7,"Rppf",  + 65.0*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 239     gMC->Gspos("RppfSmall",8,"Rppf",  + 65.0*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 240     gMC->Gspos("RppfLarge",5,"Rppf",  +224.5*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 241     gMC->Gspos("RppfLarge",6,"Rppf",  +224.5*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 242     gMC->Gspos("RppfLarge",7,"Rppf",  +224.5*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 243     gMC->Gspos("RppfLarge",8,"Rppf",  +224.5*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 244 //Gap - anod wires 6 copies to HMPID
 245   par[0]=648*mm/2;par[1]=  411*mm/2 ;par[2]=4.45*mm/2;gMC->Gsvolu("Rgap","BOX ",(*fIdtmed)[kCH4] ,par,3);//xy as PPF 2001P2 z WP 2099P1
 246   par[0]=  0*mm  ;par[1]=  20*mkm/2 ;par[2]= 648*mm/2;gMC->Gsvolu("Rano","TUBE",(*fIdtmed)[kW]   ,par,3);//WP 2099P1 z = gap x PPF 2001P2
 247   AliMatrix(matrixIdReturn,180,0, 90,90, 90,0); //wires along x
 248
 249   gMC->Gspos("Rgap",0,"HMPID",    -335*mm,      -433*mm,8*cm-2.225*mm, 0,"ONLY"); //F1 2040P1 z WP 2099P1
 250   gMC->Gspos("Rgap",1,"HMPID",    +335*mm,      -433*mm,8*cm-2.225*mm, 0,"ONLY");
 251   gMC->Gspos("Rgap",2,"HMPID",    -335*mm,         0*mm,8*cm-2.225*mm, 0,"ONLY");
 252   gMC->Gspos("Rgap",3,"HMPID",    +335*mm,         0*mm,8*cm-2.225*mm, 0,"ONLY");
 253   gMC->Gspos("Rgap",4,"HMPID",    -335*mm,      +433*mm,8*cm-2.225*mm, 0,"ONLY");
 254   gMC->Gspos("Rgap",5,"HMPID",    +335*mm,      +433*mm,8*cm-2.225*mm, 0,"ONLY");
 255   for(int i=1;i<=96;i++)
 256     gMC->Gspos("Rano",i,"Rgap",     0*mm, -411/2*mm+i*4*mm, 0.185*mm, matrixIdReturn,"ONLY"); //WP 2099P1
 257 //Defines radiators geometry
 258   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=  24*mm/2;  gMC->Gsvolu("Rrad"      ,"BOX ",(*fIdtmed)[kC6F14]     ,par,3); // Rad 2011P1
 259   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=   4*mm/2;  gMC->Gsvolu("RradFront" ,"BOX ",(*fIdtmed)[kRoha]      ,par,3); //front
 260   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=   5*mm/2;  gMC->Gsvolu("RradWin"   ,"BOX ",(*fIdtmed)[kSiO2]      ,par,3); //window
 261   par[0]=1330*mm/2 ;par[1]=   5*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RradLong"  ,"BOX ",(*fIdtmed)[kRoha]      ,par,3); //long side
 262   par[0]=  10*mm/2 ;par[1]= 403*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RradShort" ,"BOX ",(*fIdtmed)[kRoha]      ,par,3); //short side
 263   par[0]=   0      ;par[1]=  10*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RradSpacer","TUBE",(*fIdtmed)[kSiO2]      ,par,3); //spacer
 264
 265   gMC->Gspos("Rrad",1,"HMPID",   0*mm,-434*mm,   -12*mm,  0,"ONLY"); //3 radiators to HMPID
 266   gMC->Gspos("Rrad",2,"HMPID",   0*mm,   0*mm,   -12*mm,  0,"ONLY");
 267   gMC->Gspos("Rrad",3,"HMPID",   0*mm,+434*mm,   -12*mm,  0,"ONLY");
 268     gMC->Gspos("RradFront",1,"Rrad",   0*mm,   0*mm, -10.0*mm,  0,"ONLY"); //front cover
 269     gMC->Gspos("RradWin"  ,1,"Rrad",   0*mm,   0*mm,   9.5*mm,  0,"ONLY"); //quartz window (back cover)
 270     gMC->Gspos("RradLong" ,1,"Rrad",   0*mm,-204*mm,  -0.5*mm,  0,"ONLY"); //long side
 271     gMC->Gspos("RradLong" ,2,"Rrad",   0*mm,+204*mm,  -0.5*mm,  0,"ONLY"); //long side
 272     gMC->Gspos("RradShort",1,"Rrad",-660*mm,   0*mm,  -0.5*mm,  0,"ONLY"); //short side
 273     gMC->Gspos("RradShort",2,"Rrad",+660*mm,   0*mm,  -0.5*mm,  0,"ONLY"); //short side
 274     for(int i=0;i<3;i++)
 275       for(int j=0;j<10;j++)
 276         gMC->Gspos("RradSpacer",10*i+j,"Rrad",-1330*mm/2+116*mm+j*122*mm,(i-1)*105*mm,-0.5*mm,0,"ONLY");//spacers
 277 //Defines SandBox geometry
 278   par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]=50.5*mm/2; gMC->Gsvolu("Rsb"     ,"BOX ",(*fIdtmed)[kAir]  ,par,3);  //2072P1
 279   par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]= 0.5*mm/2; gMC->Gsvolu("RsbCover","BOX ",(*fIdtmed)[kAl]   ,par,3);  //cover
 280   par[0]=1359*mm/2 ;par[1]=1318*mm/2;par[2]=49.5*mm/2; gMC->Gsvolu("RsbComb" ,"BOX ",(*fIdtmed)[kRoha] ,par,3);  //honeycomb structure
 281
 282   gMC->Gspos("Rsb",1,"HMPID",   0*mm, 0*mm, -73.75*mm, 0,"ONLY"); //p.84 TDR sandbox to rich
 283     gMC->Gspos("RsbComb" ,1,"Rsb", 0*mm, 0*mm,      0*mm, 0,"ONLY"); //2072P1 honeycomv to sandbox
 284     gMC->Gspos("RsbCover",1,"Rsb", 0*mm, 0*mm,    +25*mm, 0,"ONLY"); //cover to sandbox
 285     gMC->Gspos("RsbCover",2,"Rsb", 0*mm, 0*mm,    -25*mm, 0,"ONLY"); //cover to sandbox
 286   AliDebug(1,"Stop v1. HMPID option");
 287 }//CreateGeometry()
 288 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 289 void AliHMPIDv1::Init()
 290 {
 291 // This methode defines ID for sensitive volumes, i.e. such geometry volumes for which there are if(gMC->CurrentVolID()==XXX) statements in StepManager()
 292 // Arguments: none
 293 //   Returns: none
 294   AliDebug(1,"Start v1 HMPID.");
 295   fIdRad     = gMC->VolId("Rrad");
 296   fIdWin     = gMC->VolId("RradWin");
 297   fIdPc      = gMC->VolId("Rpc");
 298   fIdAmpGap  = gMC->VolId("Rgap");
 299   fIdProxGap = gMC->VolId("Rgap");
 300   AliDebug(1,"Stop v1 HMPID.");
 301 }
 302 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 303 Bool_t AliHMPIDv1::IsLostByFresnel()
 304 {
 305 // Calculate probability for the photon to be lost by Fresnel reflection.
 306   TLorentzVector p4;
 307   Double_t mom[3],localMom[3];
 308   gMC->TrackMomentum(p4);   mom[0]=p4(1);   mom[1]=p4(2);   mom[2]=p4(3);
 309   localMom[0]=0; localMom[1]=0; localMom[2]=0;
 310   gMC->Gmtod(mom,localMom,2);
 311   Double_t localTc    = localMom[0]*localMom[0]+localMom[2]*localMom[2];
 312   Double_t localTheta = TMath::ATan2(TMath::Sqrt(localTc),localMom[1]);
 313   Double_t cotheta = TMath::Abs(TMath::Cos(localTheta));
 314   if(gMC->GetRandom()->Rndm() < Fresnel(p4.E()*1e9,cotheta,1)){
 315     AliDebug(1,"Photon lost");
 316     return kTRUE;
 317   }else
 318     return kFALSE;
 319 }//IsLostByFresnel()
 320 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 321 void AliHMPIDv1::GenFee(Int_t iCh,Float_t eloss)
 322 {
 323 // Generate FeedBack photons for the current particle. To be invoked from StepManager().
 324 // eloss=0 means photon so only pulse height distribution is to be analysed. This one is done in AliHMPIDParam::TotQdc()
 325   TLorentzVector x4;
 326   gMC->TrackPosition(x4);
 327   Int_t iNphotons=gMC->GetRandom()->Poisson(0.02*200); eloss++; iCh++;   //??????????????????????
 328   AliDebug(1,Form("N photons=%i",iNphotons));
 329   Int_t j;
 330   Float_t cthf, phif, enfp = 0, sthf, e1[3], e2[3], e3[3], vmod, uswop,dir[3], phi,pol[3], mom[4];
 331 //Generate photons
 332   for(Int_t i=0;i<iNphotons;i++){//feedbacks loop
 333     Double_t ranf[2];
 334     gMC->GetRandom()->RndmArray(2,ranf);    //Sample direction
 335     cthf=ranf[0]*2-1.0;
 336     if(cthf<0) continue;
 337     sthf = TMath::Sqrt((1 - cthf) * (1 + cthf));
 338     phif = ranf[1] * 2 * TMath::Pi();
 339
 340     if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
 341       enfp = 7.5e-9;
 342     else if(randomNumber<=0.7)
 343       enfp = 6.4e-9;
 344     else
 345       enfp = 7.9e-9;
 346
 347
 348     dir[0] = sthf * TMath::Sin(phif);    dir[1] = cthf;    dir[2] = sthf * TMath::Cos(phif);
 349     gMC->Gdtom(dir, mom, 2);
 350     mom[0]*=enfp;    mom[1]*=enfp;    mom[2]*=enfp;
 351     mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
 352
 353     // Polarisation
 354     e1[0]=      0;    e1[1]=-dir[2];    e1[2]= dir[1];
 355     e2[0]=-dir[1];    e2[1]= dir[0];    e2[2]=      0;
 356     e3[0]= dir[1];    e3[1]=      0;    e3[2]=-dir[0];
 357
 358     vmod=0;
 359     for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
 360     if (!vmod) for(j=0;j<3;j++) {
 361       uswop=e1[j];
 362       e1[j]=e3[j];
 363       e3[j]=uswop;
 364     }
 365     vmod=0;
 366     for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
 367     if (!vmod) for(j=0;j<3;j++) {
 368       uswop=e2[j];
 369       e2[j]=e3[j];
 370       e3[j]=uswop;
 371     }
 372
 373     vmod=0;  for(j=0;j<3;j++) vmod+=e1[j]*e1[j];  vmod=TMath::Sqrt(1/vmod);  for(j=0;j<3;j++) e1[j]*=vmod;
 374     vmod=0;  for(j=0;j<3;j++) vmod+=e2[j]*e2[j];  vmod=TMath::Sqrt(1/vmod);  for(j=0;j<3;j++) e2[j]*=vmod;
 375
 376     phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
 377     for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
 378     gMC->Gdtom(pol, pol, 2);
 379     Int_t outputNtracksStored;
 380     gAlice->GetMCApp()->PushTrack(1,                             //transport
 381                      gAlice->GetMCApp()->GetCurrentTrackNumber(),//parent track
 382                      kFeedback,                                  //PID
 383                      mom[0],mom[1],mom[2],mom[3],                //track momentum
 384                      x4.X(),x4.Y(),x4.Z(),x4.T(),                //track origin
 385                      pol[0],pol[1],pol[2],                       //polarization
 386                      kPFeedBackPhoton,                           //process ID
 387                      outputNtracksStored,                        //on return how many new photons stored on stack
 388                      1.0);                                       //weight
 389   }//feedbacks loop
 390   AliDebug(1,"Stop.");
 391 }//GenerateFeedbacks()
 392 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 393 void AliHMPIDv1::Hits2SDigits()
 394 {
 395 // Interface methode ivoked from AliSimulation to create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
 396 // Arguments: none
 397 //   Returns: none
 398   AliDebug(1,"Start.");
 399   for(Int_t iEvt=0;iEvt < GetLoader()->GetRunLoader()->GetNumberOfEvents();iEvt++){                //events loop
 400     GetLoader()->GetRunLoader()->GetEvent(iEvt);                          //get next event
 401
 402     if(!GetLoader()->TreeH()) {GetLoader()->LoadHits();                    }
 403     if(!GetLoader()->TreeS()) {GetLoader()->MakeTree("S"); MakeBranch("S");}//to
 404
 405     for(Int_t iPrimN=0;iPrimN<GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 406       GetLoader()->TreeH()->GetEntry(iPrimN);
 407       Hit2Sdi(Hits(),SdiLst());
 408     }//prims loop
 409     GetLoader()->TreeS()->Fill();
 410     GetLoader()->WriteSDigits("OVERWRITE");
 411     SdiReset();
 412   }//events loop
 413   GetLoader()->UnloadHits();
 414   GetLoader()->UnloadSDigits();
 415   AliDebug(1,"Stop.");
 416 }//Hits2SDigits()
 417 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 418 void AliHMPIDv1::Hit2Sdi(TClonesArray *pHitLst,TClonesArray *pSdiLst)
 419 {
 420 // Converts list of hits to list of sdigits.  For each hit in a loop the following steps are done:
 421 // - calcultion of the total charge induced by the hit
 422 // - determination of the pad contaning the hit and shifting hit y position to the nearest anod wire y
 423 // - defining a set of pads affected (up to 9 including the hitted pad)
 424 // - calculating charge induced to all those pads using integrated Mathieson distribution and creating sdigit
 425 // Arguments: pHitLst  - list of hits provided not empty
 426 //            pSDigLst - list of sdigits where to store the results
 427 //   Returns: none
 428   for(Int_t iHit=0;iHit<pHitLst->GetEntries();iHit++){         //hits loop
 429     AliHMPIDHit *pHit=(AliHMPIDHit*)pHitLst->At(iHit);           //get pointer to current hit
 430     AliHMPIDDigit::Hit2Sdi(pHit,pSdiLst);                       //convert this hit to list of sdigits
 431   }//hits loop loop
 432 }//Hits2SDigs() for TVector2
 433 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 434 void AliHMPIDv1::Digits2Raw()
 435 {
 436 // Creates raw data files in DDL format. Invoked by AliSimulation where loop over events is done
 437 // Arguments: none
 438 //   Returns: none
 439   AliDebug(1,"Start.");
 440   GetLoader()->LoadDigits();
 441   TTree * treeD = GetLoader()->TreeD();
 442   if(!treeD) {
 443     AliError("No digits tree!");
 444     return;
 445   }
 446   treeD->GetEntry(0);
 447
 448   ofstream file[AliHMPIDDigit::kNddls];   //output streams
 449   Int_t    cnt[AliHMPIDDigit::kNddls];        //data words counters for DDLs
 450   AliRawDataHeader header; //empty DDL header
 451   UInt_t w32=0;            //32 bits data word
 452
 453   for(Int_t i=0;i<AliHMPIDDigit::kNddls;i++){
 454     file[i].open(AliDAQ::DdlFileName(GetName(),i)); //open all 14 DDL in parallel
 455     file[i].write((char*)&header,sizeof(header));   //write dummy header as place holder, actual will be written later when total size of DDL is known
 456     cnt[i]=0;                                       //reset counters
 457   }
 458
 459   for(Int_t iCh=0;iCh<7;iCh++)
 460     for(Int_t iDig=0;iDig<DigLst(iCh)->GetEntriesFast();iDig++){//digits loop for a given chamber
 461       AliHMPIDDigit *pDig=(AliHMPIDDigit*)DigLst(iCh)->At(iDig);
 462       Int_t ddl=pDig->Raw(w32);                             //ddl is 0..13
 463       file[ddl].write((char*)&w32,sizeof(w32));  cnt[ddl]++;//write formated digit to the propriate file (as decided in Dig2Raw) and increment corresponding counter
 464     }//digits
 465
 466
 467   for(Int_t i=0;i<AliHMPIDDigit::kNddls;i++){
 468     header.fSize=sizeof(header)+cnt[i]*sizeof(w32);                //now calculate total number of bytes for each DDL file
 469     header.SetAttribute(0);
 470     file[i].seekp(0); file[i].write((char*)&header,sizeof(header));//rewrite DDL header with fSize field properly set
 471     file[i].close();                                               //close DDL file
 472   }
 473   GetLoader()->UnloadDigits();
 474   AliDebug(1,"Stop.");
 475 }//Digits2Raw()
 476 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 477 Float_t AliHMPIDv1::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
 478 {
 479 // Correction for Fresnel   ???????????
 480 // Arguments:   ene - photon energy [GeV],
 481 //              PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
 482 //   Returns:
 483     Float_t en[36] = {5.0,5.1,5.2,5.3,5.4,5.5,5.6,5.7,5.8,5.9,6.0,6.1,6.2,
 484                       6.3,6.4,6.5,6.6,6.7,6.8,6.9,7.0,7.1,7.2,7.3,7.4,7.5,7.6,7.7,
 485                       7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
 486     Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
 487                         2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
 488                         2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
 489                         1.72,1.53};
 490     Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
 491                         0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
 492                         0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
 493                         1.714,1.498};
 494     Float_t xe=ene;
 495     Int_t  j=Int_t(xe*10)-49;
 496     Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
 497     Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
 498
 499     //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
 500     //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
 501
 502     Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
 503     Float_t tanin=sinin/pdoti;
 504
 505     Float_t c1=cn*cn-ck*ck-sinin*sinin;
 506     Float_t c2=4*cn*cn*ck*ck;
 507     Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
 508     Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
 509
 510     Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
 511     Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
 512
 513
 514     //CORRECTION FACTOR FOR SURFACE ROUGHNESS
 515     //B.J. STAGG  APPLIED OPTICS, 30(1991),4113
 516
 517     Float_t sigraf=18.;
 518     Float_t lamb=1240/ene;
 519     Float_t fresn;
 520
 521     Float_t  rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
 522
 523     if(pola)
 524     {
 525         Float_t pdotr=0.8;                                 //DEGREE OF POLARIZATION : 1->P , -1->S
 526         fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
 527     }
 528     else
 529         fresn=0.5*(rp+rs);
 530
 531     fresn = fresn*rO;
 532     return fresn;
 533 }//Fresnel()
 534 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 535 void AliHMPIDv1::Print(Option_t *option)const
 536 {
 537 // Debug printout
 538   TObject::Print(option);
 539 }//void AliHMPID::Print(Option_t *option)const
 540 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 541 Bool_t AliHMPIDv1::Raw2SDigits(AliRawReader *pRR)
 542 {
 543 // Interface methode ivoked from AliSimulation to create a list of sdigits from raw digits. Events loop is done in AliSimulation
 544 // Arguments: pRR- raw reader
 545 //   Returns: kTRUE on success (currently ignored in AliSimulation::ConvertRaw2SDigits())
 546   AliHMPIDDigit sdi; //tmp sdigit, raw digit will be converted to it
 547
 548   if(!GetLoader()->TreeS()) {MakeTree("S");  MakeBranch("S");}
 549
 550   TClonesArray *pSdiLst=SdiLst(); Int_t iSdiCnt=0; //tmp list of sdigits for all chambers
 551   pRR->Select("HMPID",0,13);//select all HMPID DDL files
 552   UInt_t w32=0;
 553   while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
 554     UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
 555     sdi.Raw(ddl,w32);
 556     new((*pSdiLst)[iSdiCnt++]) AliHMPIDDigit(sdi); //add this digit to the tmp list
 557   }//raw records loop
 558   GetLoader()->TreeS()->Fill(); GetLoader()->WriteSDigits("OVERWRITE");//write out sdigits
 559   SdiReset();
 560   return kTRUE;
 561 }//Raw2SDigits
 562 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 563 void AliHMPIDv1::StepCount()
 564 {
 565 // Count number of ckovs created
 566 }
 567 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 568 void AliHMPIDv1::StepHistory()
 569 {
 570 // This methode is invoked from StepManager() in order to print out
 571   static Int_t iStepN;
 572   const char *sParticle;
 573   switch(gMC->TrackPid()){
 574     case kProton:      sParticle="PROTON"    ;break;
 575     case kNeutron:     sParticle="neutron"   ;break;
 576     case kGamma:       sParticle="gamma"     ;break;
 577     case kCerenkov:    sParticle="CKOV"    ;break;
 578     case kPi0:         sParticle="Pi0"       ;break;
 579     case kPiPlus:      sParticle="Pi+"       ;break;
 580     case kPiMinus:     sParticle="Pi-"       ;break;
 581     case kElectron:    sParticle="electron"  ;break;
 582     default:           sParticle="not known" ;break;
 583   }
 584
 585   TString flag="fanny combination";
 586   if(gMC->IsTrackAlive())
 587       if(gMC->IsTrackEntering())      flag="enters to";
 588       else if(gMC->IsTrackExiting())  flag="exits from";
 589       else if(gMC->IsTrackInside())   flag="inside";
 590   else
 591       if(gMC->IsTrackStop())          flag="stoped in";
 592
 593   Int_t vid=0,copy=0;
 594   TString path=gMC->CurrentVolName(); path.Prepend("-");path.Prepend(gMC->CurrentVolOffName(1));//current volume and his mother are always there
 595   vid=gMC->CurrentVolOffID(2,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
 596   vid=gMC->CurrentVolOffID(3,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
 597
 598   Printf("Step %i: %s (%i) %s %s m=%.6f GeV q=%.1f dEdX=%.4f",iStepN,sParticle,gMC->TrackPid(),flag.Data(),path.Data(),gMC->TrackMass(),gMC->TrackCharge(),gMC->Edep()*1e9);
 599
 600   Printf("Step %i: tid=%i flags alive=%i disap=%i enter=%i exit=%i inside=%i out=%i stop=%i new=%i",
 601                             iStepN, gAlice->GetMCApp()->GetCurrentTrackNumber(),
 602                             gMC->IsTrackAlive(), gMC->IsTrackDisappeared(),gMC->IsTrackEntering(), gMC->IsTrackExiting(),
 603                             gMC->IsTrackInside(),gMC->IsTrackOut(),        gMC->IsTrackStop(),     gMC->IsNewTrack());
 604
 605   Float_t a,z,den,rad,abs; a=z=den=rad=abs=-1;
 606   Int_t mid=gMC->CurrentMaterial(a,z,den,rad,abs);
 607   Printf("Step %i: id=%i a=%7.2f z=%7.2f den=%9.4f rad=%9.2f abs=%9.2f\n\n",iStepN,mid,a,z,den,rad,abs);
 608   iStepN++;
 609 }//StepHistory()
 610 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 611 void AliHMPIDv1::StepManager()
 612 {
 613 // Full Step Manager.
 614 // Arguments: none
 615 //   Returns: none
 616 //  StepHistory(); return; //uncomment to print tracks history
 617 //  StepCount(); return;     //uncomment to count photons
 618
 619   Int_t   copy; //volume copy aka node
 620
 621 //Treat photons
 622   if((gMC->TrackPid()==kCerenkov||gMC->TrackPid()==kFeedback)&&gMC->CurrentVolID(copy)==fIdPc){  //photon (Ckov or feedback) hit PC (fIdPc)
 623     if(gMC->Edep()>0){                                                                           //photon survided QE test i.e. produces electron
 624       if(IsLostByFresnel()){ gMC->StopTrack(); return;}                                          //photon lost due to fersnel reflection on PC
 625                        gMC->CurrentVolOffID(2,copy);                                             //current chamber since geomtry tree is HMPID-Rppf-Rpc
 626       Int_t   tid=     gMC->GetStack()->GetCurrentTrackNumber();                                 //take TID
 627       Int_t   pid=     gMC->TrackPid();                                                          //take PID
 628       Float_t etot=    gMC->Etot();                                                              //total hpoton energy, [GeV]
 629       Double_t x[3];   gMC->TrackPosition(x[0],x[1],x[2]);                                       //take MARS position at entrance to PC
 630       Float_t xl,yl;   AliHMPIDParam::Instance()->Mars2Lors(copy,x,xl,yl);                        //take LORS position
 631       new((*fHits)[fNhits++])AliHMPIDHit(copy,etot,pid,tid,xl,yl,x);                              //HIT for photon, position at PC
 632       GenFee(copy);                                                                              //generate feedback photons
 633     }//photon hit PC and DE >0
 634   }//photon hit PC
 635
 636 //Treat charged particles
 637   static Double_t dEdX;                                                                           //need to store mip parameters between different steps
 638   static Double_t in[3];
 639   if(gMC->TrackCharge() && gMC->CurrentVolID(copy)==fIdAmpGap){                                   //charged particle in amplification gap (fIdAmpGap)
 640     if(gMC->IsTrackEntering()||gMC->IsNewTrack()) {                                               //entering or newly created
 641       dEdX=0;                                                                                     //reset dEdX collector
 642       gMC->TrackPosition(in[0],in[1],in[2]);                                                      //take position at the entrance
 643     }else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){               //exiting or disappeared
 644       dEdX              +=gMC->Edep();                                                            //take into account last step dEdX
 645                           gMC->CurrentVolOffID(1,copy);                                           //take current chamber since geometry tree is HMPID-Rgap
 646       Int_t tid=          gMC->GetStack()->GetCurrentTrackNumber();                               //take TID
 647       Int_t pid=          gMC->TrackPid();                                                        //take PID
 648       Double_t out[3];    gMC->TrackPosition(out[0],out[1],out[2]);                               //take MARS position at exit
 649       out[0]=0.5*(out[0]+in[0]); out[1]=0.5*(out[1]+in[1]); out[1]=0.5*(out[1]+in[1]);            //take hit position at the anod plane
 650       Float_t xl,yl;AliHMPIDParam::Instance()->Mars2Lors(copy,out,xl,yl);                          //take LORS position
 651       new((*fHits)[fNhits++])AliHMPIDHit(copy,dEdX,pid,tid,xl,yl,out);                             //HIT for MIP, position near anod plane
 652       GenFee(copy,dEdX);                                                                          //generate feedback photons
 653     }else                                                                                         //just going inside
 654       dEdX          += gMC->Edep();                                                               //collect this step dEdX
 655   }//MIP in GAP
 656 }//StepManager()
 657 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++