HMPID/AliHMPIDv2.cxx

   1
   2 // **************************************************************************
   3 // * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4 // *                                                                        *
   5 // * Author: The ALICE Off-line Project.                                    *
   6 // * Contributors are mentioned in the code where appropriate.              *
   7 // *                                                                        *
   8 // * Permission to use, copy, modify and distribute this software and its   *
   9 // * documentation strictly for non-commercial purposes is hereby granted   *
  10 // * without fee, provided that the above copyright notice appears in all   *
  11 // * copies and that both the copyright notice and this permission notice   *
  12 // * appear in the supporting documentation. The authors make no claims     *
  13 // * about the suitability of this software for any purpose. It is          *
  14 // * provided "as is" without express or implied warranty.                  *
  15 // **************************************************************************
  16
  17
  18 #include "AliHMPIDv2.h"     //class header
  19 #include "AliHMPIDParam.h"  //StepManager()
  20 #include "AliHMPIDHit.h"    //Hits2SDigs(),StepManager()
  21 #include "AliHMPIDDigit.h"  //Digits2Raw(), Raw2SDigits()
  22 #include "AliRawReader.h"  //Raw2SDigits()
  23 #include <TVirtualMC.h>    //StepManager() for gMC
  24 #include <TPDGCode.h>      //StepHistory()
  25 #include <AliStack.h>      //StepManager(),Hits2SDigits()
  26 #include <AliLoader.h>        //Hits2SDigits()
  27 #include <AliRunLoader.h>     //Hits2SDigits()
  28 #include <AliConst.h>
  29 #include <AliPDG.h>
  30 #include <AliMC.h>            //StepManager()
  31 #include <AliRun.h>           //CreateMaterials()
  32 #include <AliMagF.h>          //CreateMaterials()
  33 #include <TGeoManager.h>      //CreateGeometry()
  34 #include <TF1.h>              //DefineOpticalProperties()
  35 #include <TF2.h>              //DefineOpticalProperties()
  36 #include <TLorentzVector.h>   //IsLostByFresnel()
  37 #include <AliCDBManager.h>    //CreateMaterials()
  38 #include <AliCDBEntry.h>      //CreateMaterials()
  39
  40 ClassImp(AliHMPIDv2)
  41 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  42 void AliHMPIDv2::AddAlignableVolumes()const
  43 {
  44 // Associates the symbolic volume name with the corresponding volume path. Interface method from AliModule invoked from AliMC
  45 // Arguments: none
  46 //   Returns: none
  47   for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++)
  48     gGeoManager->SetAlignableEntry(Form("/HMPID/Chamber%i",i),Form("ALIC_1/Hmp_%i",i));           //clm ???
  49 }
  50 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  51 void AliHMPIDv2::CreateMaterials()
  52 {
  53 // Definition of available HMPID materials
  54 // Arguments: none
  55 //   Returns: none
  56   AliDebug(1,"Start v2 HMPID.");
  57
  58     //clm update material definition later on from Antonello
  59
  60 //data from PDG booklet 2002     density [gr/cm^3] rad len [cm] abs len [cm]
  61   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
  62   Float_t aC6F14[2]={ 12.01 , 18.99} , zC6F14[2]={ 6 , 9}   , wC6F14[2]={6 , 14} , dC6F14=1.68    ; Int_t nC6F14=-2;
  63   Float_t  aSiO2[2]={ 28.09 , 15.99} ,  zSiO2[2]={14 , 8}   ,  wSiO2[2]={1 ,  2} ,  dSiO2=2.64    ; Int_t  nSiO2=-2;
  64   Float_t   aCH4[2]={ 12.01 ,  1.01} ,   zCH4[2]={ 6 , 1}   ,   wCH4[2]={1 ,  4} ,   dCH4=7.17e-4 ; Int_t   nCH4=-2;
  65   Float_t   aCsI[2]={132.90 ,126.90} ,   zCsI[2]={55 ,53}   ,   wCsI[2]={1 ,  1} ,   dCsI=0.1     ; Int_t   nCsI=-2;
  66
  67   Float_t     aRoha= 12.01 ,               zRoha=  6 ,                              dRoha=  0.10 ,   radRoha= 18.80 , absRoha=  86.3/dRoha; //special material- quasi quartz
  68   Float_t       aCu= 63.55 ,                 zCu= 29 ,                                dCu=  8.96 ,     radCu=  1.43 ,   absCu= 134.9/dCu  ;
  69   Float_t        aW=183.84 ,                  zW= 74 ,                                 dW= 19.30 ,      radW=  0.35 ,    absW= 185.0/dW   ;
  70   Float_t       aAl= 26.98 ,                 zAl= 13 ,                                dAl=  2.70 ,     radAl=  8.90 ,   absAl= 106.4/dAl  ;
  71   Float_t       aAr= 39.94 ,                 zAr= 18 ,                                dAr=  1.396e-3,  radAr=  14.0 ,   absAr= 117.2/dAr  ;
  72
  73     Int_t   matId=0;                           //tmp material id number
  74     Int_t   unsens =  0, sens=1;               //sensitive or unsensitive medium
  75     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
  76     Float_t maxfld = gAlice->Field()->Max();   //max field value
  77     Float_t tmaxfd = -10.0;                    //max deflection angle due to magnetic field in one step
  78     Float_t deemax = - 0.2;                    //max fractional energy loss in one step
  79     Float_t stemax = - 0.1;                    //mas step allowed [cm]
  80     Float_t epsil  =   0.001;                  //abs tracking precision [cm]
  81     Float_t stmin  = - 0.001;                  //min step size [cm] in continius process transport, negative value: choose it automatically
  82
  83     AliMixture(++matId,"Air"  ,aAir  ,zAir  ,dAir  ,nAir  ,wAir  ); AliMedium(kAir  ,"Air"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  84     AliMixture(++matId,"C6F14",aC6F14,zC6F14,dC6F14,nC6F14,wC6F14); AliMedium(kC6F14,"C6F14",matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  85     AliMixture(++matId,"SiO2" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kSiO2 ,"SiO2" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  86     AliMixture(++matId,"CH4"  ,aCH4  ,zCH4  ,dCH4  ,nCH4  ,wCH4  ); AliMedium(kCH4  ,"CH4"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  87     AliMixture(++matId,"CsI"  ,aCsI  ,zCsI  ,dCsI  ,nCsI  ,wCsI  ); AliMedium(kCsI  ,"CsI"  ,matId,   sens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);//sensitive
  88
  89     AliMixture(++matId ,"Neo" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kNeo,"Neo" , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin); //clm neoceram
  90     AliMaterial(++matId,"Roha",aRoha,zRoha,dRoha,radRoha,absRoha);  AliMedium(kRoha,"Roha", matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin); //Roha->honeycomb
  91
  92
  93     AliMaterial(++matId,"Cu"  ,aCu  ,zCu  ,dCu  ,radCu  ,absCu  );  AliMedium(kCu  ,"Cu"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  94     AliMaterial(++matId,"W"   ,aW   ,zW   ,dW   ,radW   ,absW   );  AliMedium(kW   ,"W"   , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  95     AliMaterial(++matId,"Al"  ,aAl  ,zAl  ,dAl  ,radAl  ,absAl  );  AliMedium(kAl  ,"Al"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  96     AliMaterial(++matId,"Ar"  ,aAr  ,zAr  ,dAr  ,radAr  ,absAr  );  AliMedium(kAr  ,"Ar"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
  97
  98     DefineOpticalProperties();
  99 }//void AliHMPID::CreateMaterials()
 100 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 101 void AliHMPIDv2::CreateGeometry()
 102 {
 103 //Creates detailed geometry simulation (currently GEANT volumes tree)
 104   AliDebug(1,"Start main.");
 105   if(!gMC->IsRootGeometrySupported()) return;
 106
 107  Double_t cm=1,mm=0.1*cm,um=0.001*mm;//default is cm
 108
 109   TGeoMedium *al   =gGeoManager->GetMedium("HMPID_Al");
 110   TGeoMedium *ch4  =gGeoManager->GetMedium("HMPID_CH4");
 111   TGeoMedium *roha =gGeoManager->GetMedium("HMPID_Roha");
 112   TGeoMedium *neoc =gGeoManager->GetMedium("HMPID_Neo");
 113   TGeoMedium *c6f14=gGeoManager->GetMedium("HMPID_C6F14");
 114   TGeoMedium *sio2 =gGeoManager->GetMedium("HMPID_SiO2");
 115   TGeoMedium *cu   =gGeoManager->GetMedium("HMPID_Cu");
 116   TGeoMedium *w    =gGeoManager->GetMedium("HMPID_W");
 117   TGeoMedium *csi  =gGeoManager->GetMedium("HMPID_CsI");
 118   TGeoMedium *ar   =gGeoManager->GetMedium("HMPID_Ar");
 119
 120   TGeoVolume *hmp=gGeoManager->MakeBox ("Hmp",ch4,1681*mm/2, 1466*mm/2,(2*80*mm+2*41*mm)/2);//2033P1  z from p84 TDR
 121
 122   TString title=GetTitle();
 123   if(title.Contains("TestBeam")  )
 124       {
 125         gGeoManager->GetVolume("ALIC")->AddNode(hmp,0,new TGeoTranslation(5.0*mm/2 ,  5.0*mm/2, 1000.0*mm));
 126       }
 127   else
 128     {
 129       for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){//place 7 chambers
 130       TGeoHMatrix *pMatrix=new TGeoHMatrix;
 131       AliHMPIDParam::IdealPosition(iCh,pMatrix);
 132       gGeoManager->GetVolume("ALIC")->AddNode(hmp,iCh,pMatrix);
 133        }
 134      }
 135
 136   TGeoRotation *rot=new TGeoRotation("HwireRot"); rot->RotateY(90); //rotate wires around Y to be along X (initially along Z)
 137   TGeoVolume *sbo=gGeoManager->MakeBox ("Hsbo",ch4  , 1419*mm/2 , 1378.00*mm/2 ,   50.5*mm/2);//2072P1
 138   TGeoVolume *cov=gGeoManager->MakeBox ("Hcov",al   , 1419*mm/2 , 1378.00*mm/2 ,    0.5*mm/2);
 139   TGeoVolume *hon=gGeoManager->MakeBox ("Hhon",roha , 1359*mm/2 , 1318.00*mm/2 ,   49.5*mm/2);
 140   TGeoVolume *rad=gGeoManager->MakeBox ("Hrad",c6f14, 1330*mm/2 ,  413.00*mm/2 ,   24.0*mm/2); //2011P1
 141   TGeoVolume *neo=gGeoManager->MakeBox ("Hneo",neoc , 1330*mm/2 ,  413.00*mm/2 ,    4.0*mm/2);
 142   TGeoVolume *win=gGeoManager->MakeBox ("Hwin",sio2 , 1330*mm/2 ,  413.00*mm/2 ,    5.0*mm/2);
 143   TGeoVolume *si1=gGeoManager->MakeBox ("Hsi1",sio2 , 1330*mm/2 ,    5.00*mm/2 ,   15.0*mm/2);
 144   TGeoVolume *si2=gGeoManager->MakeBox ("Hsi2",neoc ,   10*mm/2 ,  403.00*mm/2 ,   15.0*mm/2);
 145   TGeoVolume *spa=gGeoManager->MakeTube("Hspa",sio2 ,    0*mm   ,    5.00*mm   ,   15.0*mm/2);
 146   TGeoVolume *fr4=gGeoManager->MakeBox ("Hfr4",ch4  , 1407*mm/2 , 1366.00*mm/2 ,   15.0*mm/2);//2043P1
 147   TGeoVolume *f4a=gGeoManager->MakeBox ("Hf4a",al   , 1407*mm/2 , 1366.00*mm/2 ,   10.0*mm/2);
 148   TGeoVolume *f4i=gGeoManager->MakeBox ("Hf4i",ch4  , 1323*mm/2 , 1296.00*mm/2 ,   10.0*mm/2);
 149   TGeoVolume *col=gGeoManager->MakeTube("Hcol",cu   ,    0*mm   ,  100.00*um   , 1323.0*mm/2);
 150   TGeoVolume *sec=gGeoManager->MakeBox ("Hsec",ch4  ,  648*mm/2 ,  411.00*mm/2 ,   45.5*mm/2);//sec=gap+ppf
 151   TGeoVolume *ppf=gGeoManager->MakeBox ("Hppf",al   ,  648*mm/2 ,  411.00*mm/2 ,   40.0*mm/2);//2001P2
 152   TGeoVolume *lar=gGeoManager->MakeBox ("Hlar",ar   ,  181*mm/2 ,   89.25*mm/2 ,   38.3*mm/2);//2001P2
 153   TGeoVolume *smo=gGeoManager->MakeBox ("Hsmo",ar   ,  114*mm/2 ,   89.25*mm/2 ,   38.3*mm/2);//2001P2
 154   TGeoVolume *gap=gGeoManager->MakeBox ("Hgap",ch4  ,  640*mm/2 ,  403.20*mm/2 ,    5.5*mm/2);//gap=pad+ano+cat
 155   TGeoVolume *cat=gGeoManager->MakeTube("Hcat",cu   ,    0*mm   ,   50.00*um   ,    8.0*mm/2);
 156   TGeoVolume *ano=gGeoManager->MakeTube("Hano",w    ,    0*mm   ,   20.00*um   ,    8.0*mm/2);
 157   TGeoVolume *pad=gGeoManager->MakeBox ("Hpad",csi  ,    8*mm/2 ,    8.40*mm/2 ,    1.0*mm/2);
 158 //
 159 // ^ Y   z=         z=-12mm      z=98.25mm               ALIC->7xHmp (virtual)-->1xHsbo (virtual) --->2xHcov (real) 2072P1
 160 // |  ____________________________________                                    |                   |-->1xHhon (real) 2072P1
 161 // | |   ______     ____          ______  |                                   |
 162 //   |  |      |   |    |   *    |      | |                                   |->3xHrad (virtual) --->1xHneo (real) 2011P1
 163 //   |  |50.5mm|   |24mm|   *    |45.5mm| |                                   |                   |-->1xHwin (real) 2011P1
 164 //   |  |      |   |    |   *    |      | |                                   |                   |-->2xHsi1 (real) 2011P1
 165 //   |  |      |   |____|   *    |______| |                                   |                   |-->2xHsi2 (real) 2011P1
 166 //   |  |      |    ____    *     ______  |                                   |                   |->30xHspa (real) 2011P1
 167 //   |  |      |   |    |   *    |      | |                                   |
 168 //   |  |      |   |    |   *    |      | |                                   |->1xHfr4 (vitual) --->1xHf4a (real)---->1xHf4i(virtual) 2043P1
 169 //   |  |  sb  |   | rad|   *    |      | |                                   |                  |-->322xHcol (real) 2043P1
 170 //   |  |      |   |____|   *    |______| |                                   |
 171 //   |  |      |    ____    *     ______  |                                   |->6xHsec (virtual) --> 1xHppf(real) ---->8xHlar (virtual) 2001P1
 172 //   |  |      |   |    |   *    |      | |                                                                        |--->8xHsmo (virtual) 2001P1
 173 //   |  |      |   |    |   *    |      | |                                   |
 174 //   |  |      |   |    |   *    |      | |                                   |-> 1xHgap (virtual) --->48xHrow (virtual) -->80xHcel (virtual) -->4xHcat (real) from p84 TDR
 175 //   |  |______|   |____|   *    |______| |                                                                                                  |-->2xHano (real) from p84 TDR
 176 //   |____________________________________|                                                                                                  |-->1xHpad (real) from p84 TDR
 177 //                                                       --->Z
 178   hmp->AddNode(sbo ,1,new TGeoTranslation(   0*mm,   0*mm, -73.75*mm));                     //p.84 TDR
 179      sbo->AddNode(hon ,1,new TGeoTranslation(  0*mm,0*mm,      0*mm)); //2072P1
 180      sbo->AddNode(cov ,1,new TGeoTranslation(  0*mm,0*mm,    +25*mm));
 181      sbo->AddNode(cov ,2,new TGeoTranslation(  0*mm,0*mm,    -25*mm));
 182   hmp->AddNode(rad,2,new TGeoTranslation(   0*mm,+434*mm, -12.00*mm));
 183   hmp->AddNode(rad,1,new TGeoTranslation(   0*mm,   0*mm, -12.00*mm));
 184   hmp->AddNode(rad,0,new TGeoTranslation(   0*mm,-434*mm, -12.00*mm));
 185     rad->AddNode(neo,1,new TGeoTranslation(   0*mm,   0*mm, -10.0*mm));
 186     rad->AddNode(win,1,new TGeoTranslation(   0*mm,   0*mm,   9.5*mm));
 187     rad->AddNode(si1,1,new TGeoTranslation(   0*mm,-204*mm,  -0.5*mm)); rad->AddNode(si1,2,new TGeoTranslation(   0*mm,+204*mm,  -0.5*mm));
 188     rad->AddNode(si2,1,new TGeoTranslation(-660*mm,   0*mm,  -0.5*mm)); rad->AddNode(si2,2,new TGeoTranslation(+660*mm,   0*mm,  -0.5*mm));
 189     for(Int_t i=0;i<3;i++) for(Int_t j=0;j<10;j++) rad->AddNode(spa,10*i+j,new TGeoTranslation(-1330*mm/2+116*mm+j*122*mm,(i-1)*105*mm,-0.5*mm));
 190   hmp->AddNode(fr4,1,new TGeoTranslation(   0*mm,   0*mm,   9.00*mm));                     //p.84 TDR
 191   for(int i=1;i<=322;i++)  fr4->AddNode(col,i,new TGeoCombiTrans( 0*mm, -1296/2*mm+i*4*mm,-5*mm,rot)); //F4 2043P1
 192                            fr4->AddNode(f4a,1,new TGeoTranslation(   0*mm,0*mm, 2.5*mm));
 193                                         f4a->AddNode(f4i,1,new TGeoTranslation(   0*mm,0*mm,   0*mm));
 194   hmp->AddNode(sec,4,new TGeoTranslation(-335*mm,+433*mm,  98.25*mm)); hmp->AddNode(sec,5,new TGeoTranslation(+335*mm,+433*mm,  98.25*mm));
 195   hmp->AddNode(sec,2,new TGeoTranslation(-335*mm,   0*mm,  98.25*mm)); hmp->AddNode(sec,3,new TGeoTranslation(+335*mm,   0*mm,  98.25*mm));
 196   hmp->AddNode(sec,0,new TGeoTranslation(-335*mm,-433*mm,  98.25*mm)); hmp->AddNode(sec,1,new TGeoTranslation(+335*mm,-433*mm,  98.25*mm));
 197     sec->AddNode(gap,1,new TGeoTranslation(0,0,-20.00*mm));
 198   TGeoVolume *row=          gap->Divide("Hrow",2,48,0,0);//along Y->48 rows
 199   TGeoVolume *cel=          row->Divide("Hcel",1,80,0,0);//along X->80 cells
 200       cel->AddNode(cat,1,new TGeoCombiTrans (0,  3.15*mm , -2.70*mm , rot)); //4 cathode wires
 201       cel->AddNode(ano,1,new TGeoCombiTrans (0,  2.00*mm , -0.29*mm , rot)); //2 anod wires
 202       cel->AddNode(cat,2,new TGeoCombiTrans (0,  1.05*mm , -2.70*mm , rot));
 203       cel->AddNode(cat,3,new TGeoCombiTrans (0, -1.05*mm , -2.70*mm , rot));
 204       cel->AddNode(ano,2,new TGeoCombiTrans (0, -2.00*mm , -0.29*mm , rot));
 205       cel->AddNode(cat,4,new TGeoCombiTrans (0, -3.15*mm , -2.70*mm , rot));
 206       cel->AddNode(pad,1,new TGeoTranslation(0,  0.00*mm ,  2.25*mm));       //1 pad
 207     sec->AddNode(ppf,1,new TGeoTranslation(0,0,  2.75*mm));
 208 // ^ Y  single cell                                                5.5mm CH4 = 1*mm CsI + 4.45*mm CsI x cath +0.05*mm safety margin
 209 // |      ______________________________
 210 // |     |                              |          ^                            ||
 211 //       |                              | 1.05mm                                ||
 212 // 2.2*mm| xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--              50um  x                || cat shift  x=0mm , y= 3.15mm , z=-2.70mm
 213 //       |                              |                                       ||
 214 //       |                              |                                       ||
 215 // __    |  ..........................  | 2.1mm                    20un .       ||  ano shift x=0mm , y= 2.00mm , z=-0.29mm
 216 //       |                              |                                       ||
 217 //       |                              |                                       ||
 218 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x                ||  cat shift x=0mm , y= 1.05mm , z=-2.70mm
 219 //       |                              |                                       ||
 220 //       |                              |         8.4mm                         ||
 221 // 4*mm  |                              | 2.1mm                                 ||  pad shift x=0mm , y= 0.00mm , z=2.25*mm
 222 //       |                              |                                       ||
 223 //       |                              |                                       ||
 224 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x                ||  cat shift x=0mm , y=-1.05mm , z=-2.70mm
 225 //       |                              |                                       ||
 226 //       |                              |                                       ||
 227 // __    |  ..........................  | 2.1mm                         . 2.04mm||  ano shift x=0mm , y=-2.00mm , z=-0.29mm
 228 //       |                              |                                       ||
 229 //       |                              |                                       ||
 230 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x    4.45mm      ||  cat shift x=0mm , y=-3.15mm , z=-2.70mm
 231 // 2.2*mm|                              |                                       ||
 232 //       |                              | 1.05mm                                ||
 233 //       |______________________________|          v                            ||
 234 //       <             8 mm             >
 235 //                                   ----->X                                 ----->Z
 236   ppf->AddNode(lar,1,new TGeoTranslation(-224.5*mm,-151.875*mm,  0.85*mm));
 237   ppf->AddNode(lar,2,new TGeoTranslation(-224.5*mm,- 50.625*mm,  0.85*mm));
 238   ppf->AddNode(lar,3,new TGeoTranslation(-224.5*mm,+ 50.625*mm,  0.85*mm));
 239   ppf->AddNode(lar,4,new TGeoTranslation(-224.5*mm,+151.875*mm,  0.85*mm));
 240   ppf->AddNode(lar,5,new TGeoTranslation(+224.5*mm,-151.875*mm,  0.85*mm));
 241   ppf->AddNode(lar,6,new TGeoTranslation(+224.5*mm,- 50.625*mm,  0.85*mm));
 242   ppf->AddNode(lar,7,new TGeoTranslation(+224.5*mm,+ 50.625*mm,  0.85*mm));
 243   ppf->AddNode(lar,8,new TGeoTranslation(+224.5*mm,+151.875*mm,  0.85*mm));
 244   ppf->AddNode(smo,1,new TGeoTranslation(- 65.0*mm,-151.875*mm,  0.85*mm));
 245   ppf->AddNode(smo,2,new TGeoTranslation(- 65.0*mm,- 50.625*mm,  0.85*mm));
 246   ppf->AddNode(smo,3,new TGeoTranslation(- 65.0*mm,+ 50.625*mm,  0.85*mm));
 247   ppf->AddNode(smo,4,new TGeoTranslation(- 65.0*mm,+151.875*mm,  0.85*mm));
 248   ppf->AddNode(smo,5,new TGeoTranslation(+ 65.0*mm,-151.875*mm,  0.85*mm));
 249   ppf->AddNode(smo,6,new TGeoTranslation(+ 65.0*mm,- 50.625*mm,  0.85*mm));
 250   ppf->AddNode(smo,7,new TGeoTranslation(+ 65.0*mm,+ 50.625*mm,  0.85*mm));
 251   ppf->AddNode(smo,8,new TGeoTranslation(+ 65.0*mm,+151.875*mm,  0.85*mm));
 252
 253
 254
 255   AliDebug(1,"Stop v2. HMPID option");
 256 }//CreateGeometry()
 257 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 258 void AliHMPIDv2::Init()
 259 {
 260 // This methode defines ID for sensitive volumes, i.e. such geometry volumes for which there are if(gMC->CurrentVolID()==XXX) statements in StepManager()
 261 // Arguments: none
 262 //   Returns: none
 263   AliDebug(1,"Start v2 HMPID.");
 264   fIdPad     = gMC->VolId("Hpad");
 265   fIdCell    = gMC->VolId("Hcel");
 266   AliDebug(1,"Stop v2 HMPID.");
 267 }
 268 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 269 void AliHMPIDv2::DefineOpticalProperties()
 270 {
 271 // Optical properties definition.
 272   const Int_t kNbins=30;       //number of photon energy points
 273   Float_t emin=5.5,emax=8.5;         //Photon energy range,[eV]
 274   Float_t aEckov [kNbins];
 275   Float_t aAbsRad[kNbins], aAbsWin[kNbins], aAbsGap[kNbins], aAbsMet[kNbins];
 276   Float_t aIdxRad[kNbins], aIdxWin[kNbins], aIdxGap[kNbins], aIdxMet[kNbins], aIdxPc[kNbins];
 277   Float_t                                                    aQeAll [kNbins], aQePc [kNbins];
 278
 279   TF2 *pRaIF=new TF2("HidxRad","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
 280   TF1 *pWiIF=new TF1("HidxWin","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
 281   TF1 *pGaIF=new TF1("HidxGap","1+0.12489e-6/(2.62e-4 - x*x/1239.84/1239.84)"                                                         ,emin,emax);      //?????? from where
 282
 283   TF1 *pRaAF=new TF1("HabsRad","(x<7.8)*(gaus+gaus(3))+(x>=7.8)*0.0001"                                                               ,emin,emax);  //fit from DiMauro data 28.10.03
 284   pRaAF->SetParameters(3.20491e16,-0.00917890,0.742402,3035.37,4.81171,0.626309);
 285   TF1 *pWiAF=new TF1("HabsWin","(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
 286   TF1 *pGaAF=new TF1("HabsGap","(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
 287
 288   TF1 *pQeF =new TF1("Hqe"    ,"0+(x>6.07267)*0.344811*(1-exp(-1.29730*(x-6.07267)))"                                                 ,emin,emax);  //fit from DiMauro data 28.10.03
 289
 290   for(Int_t i=0;i<kNbins;i++){
 291     Float_t eV=emin+0.1*i;  //Ckov energy in eV
 292     aEckov [i] =1e-9*eV;    //Ckov energy in GeV
 293     aAbsRad[i]=pRaAF->Eval(eV); aIdxRad[i]=1.292;//pRaIF->Eval(eV,20);      //Simulation for 20 degress C
 294     aAbsWin[i]=pWiAF->Eval(eV); aIdxWin[i]=1.5787;//pWiIF->Eval(eV);
 295     aAbsGap[i]=pGaAF->Eval(eV); aIdxGap[i]=1.0005;//pGaIF->Eval(eV);
 296     aQeAll[i] =1;                     //QE for all other materials except for PC must be 1.
 297     aAbsMet[i] =0.0001;                aIdxMet[i]=0;                                             //metal ref idx must be 0 in order to reflect photon
 298                                        aIdxPc [i]=1;           aQePc [i]=pQeF->Eval(eV);         //PC ref idx must be 1 in order to apply photon to QE conversion
 299
 300   }
 301   gMC->SetCerenkov((*fIdtmed)[kC6F14]    , kNbins, aEckov, aAbsRad  , aQeAll , aIdxRad );
 302   gMC->SetCerenkov((*fIdtmed)[kSiO2]     , kNbins, aEckov, aAbsWin  , aQeAll , aIdxWin );
 303   gMC->SetCerenkov((*fIdtmed)[kCH4]      , kNbins, aEckov, aAbsGap  , aQeAll , aIdxGap );
 304   gMC->SetCerenkov((*fIdtmed)[kCu]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );
 305   gMC->SetCerenkov((*fIdtmed)[kW]        , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet ); //n=0 means reflect photons
 306   gMC->SetCerenkov((*fIdtmed)[kCsI]      , kNbins, aEckov, aAbsMet  , aQePc  , aIdxPc  ); //n=1 means convert photons
 307   gMC->SetCerenkov((*fIdtmed)[kAl]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );
 308   delete pRaAF;delete pWiAF;delete pGaAF; delete pRaIF; delete pWiIF; delete pGaIF; delete pQeF;
 309 }
 310 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 311 Bool_t AliHMPIDv2::IsLostByFresnel()
 312 {
 313 // Calculate probability for the photon to be lost by Fresnel reflection.
 314   TLorentzVector p4;
 315   Double_t mom[3],localMom[3];
 316   gMC->TrackMomentum(p4);   mom[0]=p4(1);   mom[1]=p4(2);   mom[2]=p4(3);
 317   localMom[0]=0; localMom[1]=0; localMom[2]=0;
 318   gMC->Gmtod(mom,localMom,2);
 319   Double_t localTc    = localMom[0]*localMom[0]+localMom[2]*localMom[2];
 320   Double_t localTheta = TMath::ATan2(TMath::Sqrt(localTc),localMom[1]);
 321   Double_t cotheta = TMath::Abs(TMath::Cos(localTheta));
 322   if(gMC->GetRandom()->Rndm() < Fresnel(p4.E()*1e9,cotheta,1)){
 323     AliDebug(1,"Photon lost");
 324     return kTRUE;
 325   }else
 326     return kFALSE;
 327 }//IsLostByFresnel()
 328 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 329 void AliHMPIDv2::GenFee(Float_t qtot)
 330 {
 331 // Generate FeedBack photons for the current particle. To be invoked from StepManager().
 332 // eloss=0 means photon so only pulse height distribution is to be analysed.
 333   TLorentzVector x4;
 334   gMC->TrackPosition(x4);
 335   Int_t iNphotons=gMC->GetRandom()->Poisson(0.02*qtot);  //# of feedback photons is proportional to the charge of hit
 336   AliDebug(1,Form("N photons=%i",iNphotons));
 337   Int_t j;
 338   Float_t cthf, phif, enfp = 0, sthf, e1[3], e2[3], e3[3], vmod, uswop,dir[3], phi,pol[3], mom[4];
 339 //Generate photons
 340   for(Int_t i=0;i<iNphotons;i++){//feedbacks loop
 341     Double_t ranf[2];
 342     gMC->GetRandom()->RndmArray(2,ranf);    //Sample direction
 343     cthf=ranf[0]*2-1.0;
 344     if(cthf<0) continue;
 345     sthf = TMath::Sqrt((1 - cthf) * (1 + cthf));
 346     phif = ranf[1] * 2 * TMath::Pi();
 347
 348     if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
 349       enfp = 7.5e-9;
 350     else if(randomNumber<=0.7)
 351       enfp = 6.4e-9;
 352     else
 353       enfp = 7.9e-9;
 354
 355
 356     dir[0] = sthf * TMath::Sin(phif);    dir[1] = cthf;    dir[2] = sthf * TMath::Cos(phif);
 357     gMC->Gdtom(dir, mom, 2);
 358     mom[0]*=enfp;    mom[1]*=enfp;    mom[2]*=enfp;
 359     mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
 360
 361     // Polarisation
 362     e1[0]=      0;    e1[1]=-dir[2];    e1[2]= dir[1];
 363     e2[0]=-dir[1];    e2[1]= dir[0];    e2[2]=      0;
 364     e3[0]= dir[1];    e3[1]=      0;    e3[2]=-dir[0];
 365
 366     vmod=0;
 367     for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
 368     if (!vmod) for(j=0;j<3;j++) {
 369       uswop=e1[j];
 370       e1[j]=e3[j];
 371       e3[j]=uswop;
 372     }
 373     vmod=0;
 374     for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
 375     if (!vmod) for(j=0;j<3;j++) {
 376       uswop=e2[j];
 377       e2[j]=e3[j];
 378       e3[j]=uswop;
 379     }
 380
 381     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;
 382     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;
 383
 384     phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
 385     for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
 386     gMC->Gdtom(pol, pol, 2);
 387     Int_t outputNtracksStored;
 388     gAlice->GetMCApp()->PushTrack(1,                             //transport
 389                      gAlice->GetMCApp()->GetCurrentTrackNumber(),//parent track
 390                      50000051,                                   //PID
 391                      mom[0],mom[1],mom[2],mom[3],                //track momentum
 392                      x4.X(),x4.Y(),x4.Z(),x4.T(),                //track origin
 393                      pol[0],pol[1],pol[2],                       //polarization
 394                      kPFeedBackPhoton,                           //process ID
 395                      outputNtracksStored,                        //on return how many new photons stored on stack
 396                      1.0);                                       //weight
 397   }//feedbacks loop
 398   AliDebug(1,"Stop.");
 399 }//GenerateFeedbacks()
 400 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 401 void AliHMPIDv2::Hits2SDigits()
 402 {
 403 // Interface method ivoked from AliSimulation to create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
 404 // Arguments: none
 405 //   Returns: none
 406   AliDebug(1,"Start.");
 407   for(Int_t iEvt=0;iEvt < GetLoader()->GetRunLoader()->GetNumberOfEvents();iEvt++){                //events loop
 408     GetLoader()->GetRunLoader()->GetEvent(iEvt);                          //get next event
 409
 410     if(!GetLoader()->TreeH()) {GetLoader()->LoadHits();                    }
 411     if(!GetLoader()->TreeS()) {GetLoader()->MakeTree("S"); MakeBranch("S");}//to
 412
 413     for(Int_t iEnt=0;iEnt<GetLoader()->TreeH()->GetEntries();iEnt++){//prims loop
 414       GetLoader()->TreeH()->GetEntry(iEnt);
 415       Hit2Sdi(Hits(),SdiLst());
 416     }//prims loop
 417     GetLoader()->TreeS()->Fill();
 418     GetLoader()->WriteSDigits("OVERWRITE");
 419     SdiReset();
 420   }//events loop
 421   GetLoader()->UnloadHits();
 422   GetLoader()->UnloadSDigits();
 423   AliDebug(1,"Stop.");
 424 }//Hits2SDigits()
 425 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 426 void AliHMPIDv2::Hit2Sdi(TClonesArray *pHitLst,TClonesArray *pSdiLst)
 427 {
 428 // Converts list of hits to list of sdigits.
 429 // Arguments: pHitLst  - list of hits provided not empty
 430 //            pSDigLst - list of sdigits where to store the results
 431 //   Returns: none
 432   for(Int_t iHit=0;iHit<pHitLst->GetEntries();iHit++){         //hits loop
 433     AliHMPIDHit *pHit=(AliHMPIDHit*)pHitLst->At(iHit);         //get pointer to current hit
 434     pHit->Hit2Sdi(pSdiLst);                                    //convert this hit to list of sdigits
 435   }//hits loop loop
 436 }//Hits2Sdi()
 437 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 438 void AliHMPIDv2::Digits2Raw()
 439 {
 440 // Interface method invoked by AliSimulation to create raw data streams from digits. Events loop is done in AliSimulation
 441 // Arguments: none
 442 //   Returns: none
 443   AliDebug(1,"Start.");
 444   GetLoader()->LoadDigits();
 445   TTree * treeD = GetLoader()->TreeD();
 446   if(!treeD) {
 447     AliError("No digits tree!");
 448     return;
 449   }
 450   treeD->GetEntry(0);
 451
 452   AliHMPIDDigit::WriteRaw(DigLst());
 453
 454   GetLoader()->UnloadDigits();
 455   AliDebug(1,"Stop.");
 456 }//Digits2Raw()
 457 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 458 Float_t AliHMPIDv2::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
 459 {
 460 // Correction for Fresnel   ???????????
 461 // Arguments:   ene - photon energy [GeV],
 462 //              PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
 463 //   Returns:
 464     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,
 465                       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,
 466                       7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
 467     Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
 468                         2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
 469                         2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
 470                         1.72,1.53};
 471     Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
 472                         0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
 473                         0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
 474                         1.714,1.498};
 475     Float_t xe=ene;
 476     Int_t  j=Int_t(xe*10)-49;
 477     Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
 478     Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
 479
 480     //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
 481     //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
 482
 483     Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
 484     Float_t tanin=sinin/pdoti;
 485
 486     Float_t c1=cn*cn-ck*ck-sinin*sinin;
 487     Float_t c2=4*cn*cn*ck*ck;
 488     Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
 489     Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
 490
 491     Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
 492     Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
 493
 494
 495     //CORRECTION FACTOR FOR SURFACE ROUGHNESS
 496     //B.J. STAGG  APPLIED OPTICS, 30(1991),4113
 497
 498     Float_t sigraf=18.;
 499     Float_t lamb=1240/ene;
 500     Float_t fresn;
 501
 502     Float_t  rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
 503
 504     if(pola)
 505     {
 506         Float_t pdotr=0.8;                                 //DEGREE OF POLARIZATION : 1->P , -1->S
 507         fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
 508     }
 509     else
 510         fresn=0.5*(rp+rs);
 511
 512     fresn = fresn*rO;
 513     return fresn;
 514 }//Fresnel()
 515 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 516 void AliHMPIDv2::Print(Option_t *option)const
 517 {
 518 // Debug printout
 519   TObject::Print(option);
 520 }//void AliHMPID::Print(Option_t *option)const
 521 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 522 Bool_t AliHMPIDv2::Raw2SDigits(AliRawReader *pRR)
 523 {
 524 // Interface methode ivoked from AliSimulation to create a list of sdigits from raw digits. Events loop is done in AliSimulation
 525 // Arguments: pRR- raw reader
 526 //   Returns: kTRUE on success (currently ignored in AliSimulation::ConvertRaw2SDigits())
 527   AliHMPIDDigit sdi; //tmp sdigit, raw digit will be converted to it
 528
 529   if(!GetLoader()->TreeS()) {MakeTree("S");  MakeBranch("S");}
 530
 531   TClonesArray *pSdiLst=SdiLst(); Int_t iSdiCnt=0; //tmp list of sdigits for all chambers
 532   pRR->Select("HMPID",0,13);//select all HMPID DDL files
 533   UInt_t w32=0;
 534   while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
 535     UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
 536     sdi.Raw(ddl,w32);
 537     new((*pSdiLst)[iSdiCnt++]) AliHMPIDDigit(sdi); //add this digit to the tmp list
 538   }//raw records loop
 539   GetLoader()->TreeS()->Fill(); GetLoader()->WriteSDigits("OVERWRITE");//write out sdigits
 540   SdiReset();
 541   return kTRUE;
 542 }//Raw2SDigits
 543 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 544 void AliHMPIDv2::StepCount()
 545 {
 546 // Count number of ckovs created
 547 }
 548 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 549 void AliHMPIDv2::StepHistory()
 550 {
 551 // This methode is invoked from StepManager() in order to print out
 552   static Int_t iStepN;
 553   const char *sParticle;
 554   switch(gMC->TrackPid()){
 555     case kProton:      sParticle="PROTON"    ;break;
 556     case kNeutron:     sParticle="neutron"   ;break;
 557     case kGamma:       sParticle="gamma"     ;break;
 558     case 50000050:     sParticle="CKOV"      ;break;
 559     case kPi0:         sParticle="Pi0"       ;break;
 560     case kPiPlus:      sParticle="Pi+"       ;break;
 561     case kPiMinus:     sParticle="Pi-"       ;break;
 562     case kElectron:    sParticle="electron"  ;break;
 563     default:           sParticle="not known" ;break;
 564   }
 565
 566   TString flag="fanny combination";
 567   if(gMC->IsTrackAlive())
 568       if(gMC->IsTrackEntering())      flag="enters to";
 569       else if(gMC->IsTrackExiting())  flag="exits from";
 570       else if(gMC->IsTrackInside())   flag="inside";
 571   else
 572       if(gMC->IsTrackStop())          flag="stoped in";
 573
 574
 575
 576
 577   Int_t vid=0,copy=0;
 578   TString path=gMC->CurrentVolName(); path.Prepend("-");path.Prepend(gMC->CurrentVolOffName(1));//current volume and his mother are always there
 579   vid=gMC->CurrentVolOffID(2,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
 580   vid=gMC->CurrentVolOffID(3,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
 581
 582
 583   Printf("Step %i: %s (%i) %s %s m=%.6f GeV q=%.1f dEdX=%.4f Etot=%.4f",iStepN,sParticle,gMC->TrackPid(),flag.Data(),path.Data(),gMC->TrackMass(),gMC->TrackCharge(),gMC->Edep()*1e9,gMC->Etot());
 584
 585   Double_t gMcTrackPos[3]; gMC->TrackPosition(gMcTrackPos[0],gMcTrackPos[1],gMcTrackPos[2]);
 586   Double_t  gMcTrackPosLoc[3]; gMC->Gmtod(gMcTrackPos,gMcTrackPosLoc,1);
 587   Printf("gMC Track Position (MARS) x: %5.3lf, y: %5.3lf, z: %5.3lf (r: %5.3lf) ---> (LOC) x: %5.3f, y: %5.3f, z: %5.3f",gMcTrackPos[0],gMcTrackPos[1],gMcTrackPos[2],TMath::Sqrt(gMcTrackPos[0]*gMcTrackPos[0]+gMcTrackPos[1]*gMcTrackPos[1]+gMcTrackPos[2]*gMcTrackPos[2]),gMcTrackPosLoc[0],gMcTrackPosLoc[1],gMcTrackPosLoc[2]);
 588
 589
 590
 591   Printf("Step %i: tid=%i flags alive=%i disap=%i enter=%i exit=%i inside=%i out=%i stop=%i new=%i",
 592                             iStepN, gAlice->GetMCApp()->GetCurrentTrackNumber(),
 593                             gMC->IsTrackAlive(), gMC->IsTrackDisappeared(),gMC->IsTrackEntering(), gMC->IsTrackExiting(),
 594                             gMC->IsTrackInside(),gMC->IsTrackOut(),        gMC->IsTrackStop(),     gMC->IsNewTrack());
 595
 596   Float_t a,z,den,rad,abs; a=z=den=rad=abs=-1;
 597   Int_t mid=gMC->CurrentMaterial(a,z,den,rad,abs);
 598   Printf("Step %i: mid=%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);
 599
 600   TArrayI proc;  gMC->StepProcesses(proc);
 601   Printf("Processes in this step:");
 602   for ( int i = 0 ; i < proc.GetSize(); i++)
 603   {
 604     Printf("%s",TMCProcessName[proc.At(i)]);
 605   }
 606   Printf("End process list");
 607
 608   iStepN++;
 609 }//StepHistory()
 610 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 611 void AliHMPIDv2::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()==50000050||gMC->TrackPid()==50000051)&&gMC->CurrentVolID(copy)==fIdPad){   //photon (Ckov or feedback) hit PC (fIdPad)
 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(5,copy);                                             //current chamber since geomtry tree is Hmp-Hsec-Hgap-Hrow-Hcel-Hpad
 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        if ( yl < 0  ) Printf("-------------------> SUPER PROBLEM PHOTON>>> Ch: %d, x[]: %f %f %f (MARS)-> xl: %f yl: %f",copy,x[0],x[1],x[2],xl,yl);
 632       new((*fHits)[fNhits++])AliHMPIDHit(copy,etot,pid,tid,xl,yl,x);                             //HIT for photon, position at P, etot will be set to Q
 633       GenFee(etot);                                                                              //generate feedback photons etot is modified in hit ctor to Q of hit
 634     }//photon hit PC and DE >0
 635   }//photon hit PC
 636
 637 //Treat charged particles
 638   static Float_t eloss;                                                                           //need to store mip parameters between different steps
 639   static Double_t in[3];
 640   if(gMC->TrackCharge() && gMC->CurrentVolID(copy)==fIdCell){                                     //charged particle in amplification gap (fIdCell)
 641     if(gMC->IsTrackEntering()||gMC->IsNewTrack()) {                                               //entering or newly created
 642       eloss=0;                                                                                    //reset Eloss collector
 643       gMC->TrackPosition(in[0],in[1],in[2]);                                                      //take position at the entrance
 644     }else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){               //exiting or disappeared
 645       eloss              +=gMC->Edep();                                                           //take into account last step Eloss
 646                           gMC->CurrentVolOffID(4,copy);                                           //take current chamber since geometry tree is Hmp-Hsec-Hgap-Hrow-Hcel
 647       Int_t tid=          gMC->GetStack()->GetCurrentTrackNumber();                               //take TID
 648       Int_t pid=          gMC->TrackPid();                                                        //take PID
 649       Double_t out[3];    gMC->TrackPosition(out[0],out[1],out[2]);                               //take MARS position at exit
 650       out[0]=0.5*(out[0]+in[0]);                                                                  //>
 651       out[1]=0.5*(out[1]+in[1]);                                                                  //take hit position at the anod plane
 652       out[2]=0.5*(out[2]+in[2]);                                                                  //>
 653       Float_t xl,yl;AliHMPIDParam::Instance()->Mars2Lors(copy,out,xl,yl);                         //take LORS position
 654        if ( yl < 0  ) Printf("-------------------> SUPER PROBLEM CHARGED>>> Ch: %d, x[]: %f %f %f (MARS)-> xl: %f yl: %f",copy,out[0],out[1],out[2],xl,yl);
 655       new((*fHits)[fNhits++])AliHMPIDHit(copy,eloss,pid,tid,xl,yl,out);                           //HIT for MIP, position near anod plane, eloss will be set to Q
 656       GenFee(eloss);                                                                              //generate feedback photons
 657     }else                                                                                         //just going inside
 658       eloss          += gMC->Edep();                                                              //collect this step eloss
 659   }//MIP in GAP
 660 }//StepManager()
 661 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++