RICH/AliRICH.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 #include "AliRICH.h"
  17 #include "AliRICHParam.h"
  18 #include "AliRICHChamber.h"
  19 #include "AliRICHClusterFinder.h"
  20 #include <TArrayF.h>
  21 #include <TGeometry.h>
  22 #include <TBRIK.h>
  23 #include <TTUBE.h>
  24 #include <TFile.h>
  25 #include <TNode.h>
  26 #include <TObjArray.h>
  27 #include <TParticle.h>
  28 #include <AliStack.h>
  29 #include <AliMagF.h>
  30 #include <AliRun.h>
  31 #include <AliRunDigitizer.h>
  32 #include <AliMC.h>
  33 #include <AliESD.h>
  34 #include <TVirtualMC.h>
  35 #include <TH1F.h>
  36 #include <TH2F.h>
  37 #include <TStopwatch.h>
  38
  39 ClassImp(AliRICHhit)
  40 //__________________________________________________________________________________________________
  41 void AliRICHhit::Print(Option_t*)const
  42 {
  43   ::Info("hit","Ch=%1i, TID=%6i, eloss=%9.3f eV, in-out dist=%9.4f, OUT(%7.2f,%7.2f,%7.2f)"
  44       ,fChamber,fTrack,fEloss*1e9,Length(),fOutX3.X(),fOutX3.Y(),fOutX3.Z());
  45 }
  46 //__________________________________________________________________________________________________
  47 ClassImp(AliRICHdigit)
  48 //__________________________________________________________________________________________________
  49 void AliRICHdigit::Print(Option_t*)const
  50 {
  51   ::Info("digit","cfm=%9i, cs=%2i, x=%3i, y=%3i, q=%8.3f, TID1=%5i, TID2=%5i, TID3=%5i",
  52                   fCFM,fChamber,fPadX,fPadY,fQdc,fTracks[0],fTracks[1],fTracks[2]);
  53 }
  54 //__________________________________________________________________________________________________
  55 ClassImp(AliRICHcluster)
  56 //__________________________________________________________________________________________________
  57 void AliRICHcluster::Print(Option_t*)const
  58 {
  59   char *status=0;
  60   switch(fStatus){
  61     case      kRaw: status="raw"     ;break;
  62     case kResolved: status="resolved";break;
  63     case    kEmpty: status="empty"   ;break;
  64   }
  65   if(fDigits)
  66     ::Info("cluster","cfm=%10i, cs=%2i, SiMa=%6i, Shape=%5i, x=%7.3f, y=%7.3f, Q=%6i, %s with %i digits",
  67                              fCFM,fChamber,fSize,fShape,fX,fY,fQdc,status,fDigits->GetEntriesFast());
  68   else
  69     ::Info("cluster","cfm=%10i, cs=%2i, SiMa=%6i, Shape=%5i, x=%7.3f, y=%7.3f, Q=%6i, %s with %i digits",
  70                              fCFM,fChamber,fSize,fShape,fX,fY,fQdc,status,0);
  71
  72 }
  73 //__________________________________________________________________________________________________
  74 ClassImp(AliRICH)
  75 //__________________________________________________________________________________________________
  76 // RICH manager class
  77 //BEGIN_HTML
  78 /*
  79   <img src="gif/alirich.gif">
  80 */
  81 //END_HTML
  82 //__________________________________________________________________________________________________
  83 AliRICH::AliRICH():AliDetector(),fpParam(0),  fSdigits(0),fNsdigits(0),fDigitsNew(0),fClusters(0)
  84 {
  85 //Default ctor should not contain any new operators
  86 //AliDetector ctor deals with Hits and Digits
  87   for(int i=0;i<kNchambers;i++) fNdigitsNew[i]  =0;
  88   for(int i=0;i<kNchambers;i++) fNclusters[i]=0;
  89 //  fCounters.ResizeTo(20); fCounters.Zero();
  90 }//AliRICH::AliRICH()
  91 //__________________________________________________________________________________________________
  92 AliRICH::AliRICH(const char *name, const char *title)
  93         :AliDetector(name,title),fpParam(new AliRICHParam),fSdigits(0),fNsdigits(0),fDigitsNew(0),fClusters(0)
  94 {
  95 //Named ctor
  96   if(GetDebug())Info("named ctor","Start.");
  97 //AliDetector ctor deals with Hits and Digits (reset them to 0, does not create them)
  98   CreateHits();          gAlice->GetMCApp()->AddHitList(fHits);
  99   fCounters.ResizeTo(20); fCounters.Zero();
 100   if(GetDebug())Info("named ctor","Stop.");
 101 }//AliRICH::AliRICH(const char *name, const char *title)
 102 //__________________________________________________________________________________________________
 103 AliRICH::~AliRICH()
 104 {
 105 //dtor
 106   if(GetDebug()) Info("dtor","Start.");
 107
 108   if(fpParam)    delete fpParam;
 109
 110   if(fHits)      delete fHits;
 111   if(fSdigits)   delete fSdigits;
 112   if(fDigits)    delete fDigits;
 113   if(fDigitsNew) {fDigitsNew->Delete();   delete fDigitsNew;}
 114   if(fClusters)  {fClusters->Delete();    delete fClusters;}
 115   if(GetDebug()) Info("dtor","Stop.");
 116 }//AliRICH::~AliRICH()
 117 //__________________________________________________________________________________________________
 118 void AliRICH::Hits2SDigits()
 119 {
 120 // Create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
 121   if(GetDebug()) Info("Hit2SDigits","Start.");
 122   for(Int_t iEventN=0;iEventN<GetLoader()->GetRunLoader()->GetAliRun()->GetEventsPerRun();iEventN++){//events loop
 123     GetLoader()->GetRunLoader()->GetEvent(iEventN);//get next event
 124
 125     if(!GetLoader()->TreeH()) GetLoader()->LoadHits();    GetLoader()->GetRunLoader()->LoadHeader();
 126                                                           GetLoader()->GetRunLoader()->LoadKinematics();//from
 127     if(!GetLoader()->TreeS()) GetLoader()->MakeTree("S"); MakeBranch("S");//to
 128
 129     for(Int_t iPrimN=0;iPrimN<GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 130       GetLoader()->TreeH()->GetEntry(iPrimN);
 131       for(Int_t iHitN=0;iHitN<Hits()->GetEntries();iHitN++){//hits loop
 132         AliRICHhit *pHit=(AliRICHhit*)Hits()->At(iHitN);//get current hit
 133         TVector2 x2 = C(pHit->C())->Glob2Loc(pHit->OutX3());//hit position in the chamber local system
 134         Int_t iTotQdc=P()->TotQdc(x2,pHit->Eloss());//total charge produced by hit, 0 if hit in dead zone
 135         if(iTotQdc==0) continue;
 136         TVector area=P()->Loc2Area(x2);//determine affected pads, dead zones analysed inside
 137         if(GetDebug()) Info("Hits2SDigits","hit(%6.2f,%6.2f)->area(%3.0f,%3.0f)-(%3.0f,%3.0f) QDC=%4i",x2.X(),x2.Y(),area[0],area[1],area[2],area[3],iTotQdc);
 138         TVector pad(2);
 139         for(pad[1]=area[1];pad[1]<=area[3];pad[1]++)//affected pads loop
 140           for(pad[0]=area[0];pad[0]<=area[2];pad[0]++){
 141             Double_t padQdc=iTotQdc*P()->FracQdc(x2,pad);
 142             if(GetDebug()) Info("Hits2SDigits","current pad(%3.0f,%3.0f) with QDC  =%6.2f",pad[0],pad[1],padQdc);
 143             if(padQdc>0.1) AddSDigit(pHit->C(),pad,padQdc,GetLoader()->GetRunLoader()->Stack()->Particle(pHit->GetTrack())->GetPdgCode(),pHit->GetTrack());
 144           }//affected pads loop
 145       }//hits loop
 146     }//prims loop
 147     GetLoader()->TreeS()->Fill();
 148     GetLoader()->WriteSDigits("OVERWRITE");
 149     ResetSDigits();
 150   }//events loop
 151   GetLoader()->UnloadHits(); GetLoader()->GetRunLoader()->UnloadHeader(); GetLoader()->GetRunLoader()->UnloadKinematics();
 152   GetLoader()->UnloadSDigits();
 153   if(GetDebug()) Info("Hit2SDigits","Stop.");
 154 }//Hits2SDigits()
 155 //__________________________________________________________________________________________________
 156 void AliRICH::BuildGeometry()
 157 {
 158 //Builds a TNode geometry for event display
 159   if(GetDebug())Info("BuildGeometry","Start.");
 160
 161   TNode *node, *subnode, *top;
 162   top=gAlice->GetGeometry()->GetNode("alice");
 163
 164   new TBRIK("S_RICH","S_RICH","void",71.09999,11.5,73.15);
 165
 166   Float_t wid=P()->SectorSizeX();
 167   Float_t len=P()->SectorSizeY();
 168   new TBRIK("PHOTO","PHOTO","void",wid/2,0.1,len/2);
 169
 170   for(int i=1;i<=kNchambers;i++){
 171     top->cd();
 172     node = new TNode(Form("RICH%i",i),Form("RICH%i",i),"S_RICH",C(i)->X(),C(i)->Y(),C(i)->Z(),C(i)->RotMatrixName());
 173     node->SetLineColor(kRed);
 174     node->cd();
 175     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",wid+P()->DeadZone(),5,len/2+P()->DeadZone()/2,"");
 176     subnode->SetLineColor(kGreen);
 177     fNodes->Add(subnode);
 178     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",0,5,len/2+P()->DeadZone()/2,"");
 179     subnode->SetLineColor(kGreen);
 180     fNodes->Add(subnode);
 181     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",-wid-P()->DeadZone(),5,len/2+P()->DeadZone()/2,"");
 182     subnode->SetLineColor(kGreen);
 183     fNodes->Add(subnode);
 184     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",wid+P()->DeadZone(),5,-len/2-P()->DeadZone()/2,"");
 185     subnode->SetLineColor(kGreen);
 186     fNodes->Add(subnode);
 187     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",0,5,-len/2 -P()->DeadZone()/2,"");
 188     subnode->SetLineColor(kGreen);
 189     fNodes->Add(subnode);
 190     subnode = new TNode("PHOTO1","PHOTO1","PHOTO",-wid-P()->DeadZone(),5,-len/2 - P()->DeadZone()/2,"");
 191     subnode->SetLineColor(kGreen);
 192     fNodes->Add(subnode);
 193     fNodes->Add(node);
 194   }
 195   if(GetDebug())Info("BuildGeometry","Stop.");
 196 }//void AliRICH::BuildGeometry()
 197
 198 //______________________________________________________________________________
 199 void AliRICH::CreateMaterials()
 200 {
 201 // Definition of available RICH materials
 202 #include "Opticals.h"
 203
 204   Float_t a=0,z=0,den=0,radl=0,absl=0;
 205   Float_t tmaxfd=-10.0, deemax=-0.2, stemax=-0.1,epsil=0.001, stmin=-0.001;
 206   Int_t   isxfld = gAlice->Field()->Integ();
 207   Float_t sxmgmx = gAlice->Field()->Max();
 208   Int_t material;
 209
 210   AliMaterial(material=1, "Air     $",a=14.61,z=7.3, den=0.001205,radl=30420.0,absl=67500);//(Air)
 211   AliMedium(1, "DEFAULT MEDIUM AIR$",material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 212
 213   AliMaterial( 6, "HON",      a=12.01,z=6.0, den=0.1,     radl=18.8,   absl=0);    //(C)-equivalent radl
 214   AliMedium(2, "HONEYCOMB$", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 215
 216   AliMaterial(16, "CSI",      a=12.01,z=6.0, den=0.1,     radl=18.8,   absl=0);    //CsI-radl equivalent
 217   AliMedium(kCSI, "CSI$", 16, 1, isxfld, sxmgmx,tmaxfd, stemax, deemax, epsil, stmin);
 218
 219   AliMaterial(11, "GRI",      a=63.54,z=29.0,den=8.96,    radl=1.43,   absl=0);    //anode grid (Cu)
 220   AliMedium(7, "GRID$", 11, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 221
 222   AliMaterial(50, "ALUM",     a=26.98,z=13.0,den=2.699,     radl=8.9,    absl=0);    //aluminium sheet (Al)
 223   AliMedium(10, "ALUMINUM$", 50, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 224
 225   AliMaterial(material=31, "COPPER$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);    //(Cu)
 226   AliMedium(12, "PCB_COPPER", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 227
 228   Float_t  aQuartz[2]={28.09,16.0};  Float_t  zQuartz[2]={14.00, 8.0};  Float_t  wmatQuartz[2]={1,2};
 229   AliMixture (20, "QUA",aQuartz,zQuartz,den=2.64,-2, wmatQuartz);//Quarz (SiO2) - trasnparent
 230   AliMedium(3, "QUARTZ$", 20, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 231
 232   AliMixture (21, "QUAO",aQuartz, zQuartz, den=2.64, -2, wmatQuartz);//Quarz (SiO2) - opaque
 233   AliMedium(8, "QUARTZO$", 21, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 234
 235   Float_t  aFreon[2]={12,19};  Float_t  zFreon[2]={6,9};  Float_t wmatFreon[2]={6,14};
 236   AliMixture (material=30, "C6F14",aFreon,zFreon,den=1.68,-2,wmatFreon);//Freon (C6F14)
 237   AliMedium(4, "C6F14$",material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 238
 239   Float_t aMethane[2]={12.01,1}; Float_t zMethane[2]={6,1}; Float_t wmatMethane[2]={1,4};
 240   AliMixture (material=40, "CH4", aMethane, zMethane, den=7.17e-4,-2, wmatMethane);//methane (CH4)
 241   AliMedium(kCH4, "CH4$"   , material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 242   AliMedium(kGAP, "CH4GAP$", material, 1, isxfld, sxmgmx,tmaxfd, 0.1, -deemax, epsil, -stmin);
 243
 244   if(P()->IsRadioSrc()){
 245     AliMaterial(material=45, "STEEL$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);    //Steel
 246     AliMedium(kSteel, "STEEL", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 247
 248     AliMaterial(material=46, "PERPEX$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);    //Perpex
 249     AliMedium(kPerpex, "PERPEX", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 250
 251     AliMaterial(material=47, "STRONZIUM$",  a=87.62,z=38.0,den=2.54,    radl=4.24,    absl=0); //Sr90
 252     AliMedium(kSr90, "STRONZIUM", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 253   }
 254
 255   Float_t aGlass[5]={12.01, 28.09, 16.,   10.8,  23.};
 256   Float_t zGlass[5]={ 6.,   14.,    8.,    5.,   11.};
 257   Float_t wGlass[5]={ 0.5,  0.105, 0.355, 0.03,  0.01};
 258   AliMixture(material=32, "GLASS",aGlass, zGlass, den=1.74, 5, wGlass);//Glass 50%C+10.5%Si+35.5%O+3% + 1%
 259   AliMedium(11, "GLASS", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 260
 261   Int_t *idtmed = fIdtmed->GetArray()-999;
 262   gMC->SetCerenkov(idtmed[1000], kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);
 263   gMC->SetCerenkov(idtmed[1001], kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);
 264   gMC->SetCerenkov(idtmed[1002], kNbins, aPckov, aAbsSiO2,   aQeAll, aIdxSiO2);
 265   gMC->SetCerenkov(idtmed[1003], kNbins, aPckov, aAbsC6F14,  aQeAll, aIdxC6F14);
 266   gMC->SetCerenkov(idtmed[1004], kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);
 267   gMC->SetCerenkov(idtmed[1005], kNbins, aPckov, aAbsCsI,    aQeCsI, aIdxCH4);
 268   gMC->SetCerenkov(idtmed[1006], kNbins, aPckov, aAbsGrid,   aQeAll, aIdxGrid);
 269   gMC->SetCerenkov(idtmed[1007], kNbins, aPckov, aAbsOpSiO2, aQeAll, aIdxOpSiO2);
 270   gMC->SetCerenkov(idtmed[1008], kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);
 271   gMC->SetCerenkov(idtmed[1009], kNbins, aPckov, aAbsGrid,   aQeAll, aIdxGrid);
 272   gMC->SetCerenkov(idtmed[1010], kNbins, aPckov, aAbsOpSiO2, aQeAll, aIdxOpSiO2);
 273
 274 }//void AliRICH::CreateMaterials()
 275 //__________________________________________________________________________________________________
 276 Float_t AliRICH::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)const
 277 {
 278
 279     //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
 280
 281     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,
 282                       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,
 283                       7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
 284     Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
 285                         2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
 286                         2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
 287                         1.72,1.53};
 288     Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
 289                         0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
 290                         0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
 291                         1.714,1.498};
 292     Float_t xe=ene;
 293     Int_t  j=Int_t(xe*10)-49;
 294     Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
 295     Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
 296
 297     //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
 298     //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
 299
 300     Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
 301     Float_t tanin=sinin/pdoti;
 302
 303     Float_t c1=cn*cn-ck*ck-sinin*sinin;
 304     Float_t c2=4*cn*cn*ck*ck;
 305     Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
 306     Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
 307
 308     Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
 309     Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
 310
 311
 312     //CORRECTION FACTOR FOR SURFACE ROUGHNESS
 313     //B.J. STAGG  APPLIED OPTICS, 30(1991),4113
 314
 315     Float_t sigraf=18.;
 316     Float_t lamb=1240/ene;
 317     Float_t fresn;
 318
 319     Float_t  rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
 320
 321     if(pola)
 322     {
 323         Float_t pdotr=0.8;                                 //DEGREE OF POLARIZATION : 1->P , -1->S
 324         fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
 325     }
 326     else
 327         fresn=0.5*(rp+rs);
 328
 329     fresn = fresn*rO;
 330     return(fresn);
 331 }//Fresnel()
 332 //__________________________________________________________________________________________________
 333 Float_t AliRICH::AbsoCH4(Float_t x)const
 334 {
 335 //Evaluate the absorbtion lenght of CH4
 336   Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.};              //MB X 10^22
 337   Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
 338   const Float_t kLoschmidt=2.686763e19;                                      // LOSCHMIDT NUMBER IN CM-3
 339   const Float_t kPressure=750.,kTemperature=283.;
 340   const Float_t kPn=kPressure/760.;
 341   const Float_t kTn=kTemperature/273.16;
 342   const Float_t kC0=-1.655279e-1;
 343   const Float_t kC1=6.307392e-2;
 344   const Float_t kC2=-8.011441e-3;
 345   const Float_t kC3=3.392126e-4;
 346
 347   Float_t crossSection=0;
 348   if (x<7.75)
 349     crossSection=.06e-22;
 350   else if(x>=7.75 && x<=8.1){                 //------ METHANE CROSS SECTION cm-2 ASTROPH. J. 214, L47 (1978)
 351         crossSection=(kC0+kC1*x+kC2*x*x+kC3*x*x*x)*1.e-18;
 352   }else if (x> 8.1){
 353     Int_t j=0;
 354     while (x<=em[j] || x>=em[j+1]){
 355       j++;
 356       Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
 357       crossSection=(sch4[j]+a*(x-em[j]))*1e-22;
 358     }
 359   }//if
 360
 361     Float_t density=kLoschmidt*kPn/kTn; //CH4 molecular density 1/cm-3
 362     return 1./(density*crossSection);
 363 }//AbsoCH4()
 364 //__________________________________________________________________________________________________
 365 void AliRICH::MakeBranch(Option_t* option)
 366 {
 367 //Create Tree branches for the RICH.
 368   if(GetDebug())Info("MakeBranch","Start with option= %s.",option);
 369
 370   const Int_t kBufferSize = 4000;
 371
 372   const char *cH = strstr(option,"H");
 373   const char *cD = strstr(option,"D");
 374   const char *cR = strstr(option,"R");
 375   const char *cS = strstr(option,"S");
 376
 377   if(cH&&TreeH()){//H
 378     CreateHits();      //branch will be created in AliDetector::MakeBranch
 379   }//H
 380   AliDetector::MakeBranch(option);//this is after cH because we need to guarantee that fHits array is created
 381
 382   if(cS&&fLoader->TreeS()){//S
 383     CreateSDigits();   MakeBranchInTree(fLoader->TreeS(),"RICH",&fSdigits,kBufferSize,0) ;
 384   }//S
 385
 386   if(cD&&fLoader->TreeD()){//D
 387     CreateDigits();
 388     for(Int_t i=0;i<kNchambers;i++){
 389       MakeBranchInTree(fLoader->TreeD(),Form("%s%d",GetName(),i+1),&((*fDigitsNew)[i]),kBufferSize,0);
 390     }
 391   }//D
 392
 393   if(cR&&fLoader->TreeR()){//R
 394     CreateClusters();
 395     for(Int_t i=0;i<kNchambers;i++)
 396       MakeBranchInTree(fLoader->TreeR(),Form("%sClusters%d",GetName(),i+1), &((*fClusters)[i]), kBufferSize, 0);
 397   }//R
 398   if(GetDebug())Info("MakeBranch","Stop.");
 399 }//void AliRICH::MakeBranch(Option_t* option)
 400 //__________________________________________________________________________________________________
 401 void AliRICH::SetTreeAddress()
 402 {
 403 //Set branch address for the Hits and Digits Tree.
 404   if(GetDebug())Info("SetTreeAddress","Start.");
 405
 406   TBranch *branch;
 407
 408   if(fLoader->TreeH()){//H
 409     if(GetDebug())Info("SetTreeAddress","tree H is requested.");
 410     CreateHits();//branch map will be in AliDetector::SetTreeAddress
 411   }//H
 412   AliDetector::SetTreeAddress();//this is after TreeH because we need to guarantee that fHits array is created
 413
 414   if(fLoader->TreeS()){//S
 415     if(GetDebug())Info("SetTreeAddress","tree S is requested.");
 416     branch=fLoader->TreeS()->GetBranch(GetName());        if(branch){CreateSDigits();   branch->SetAddress(&fSdigits);}
 417   }//S
 418
 419   if(fLoader->TreeD()){//D
 420     if(GetDebug())Info("SetTreeAddress","tree D is requested.");
 421     for(int i=0;i<kNchambers;i++){
 422       branch=fLoader->TreeD()->GetBranch(Form("%s%d",GetName(),i+1));
 423       if(branch){CreateDigits(); branch->SetAddress(&((*fDigitsNew)[i]));}
 424     }
 425   }//D
 426
 427   if(fLoader->TreeR()){//R
 428     if(GetDebug())Info("SetTreeAddress","tree R is requested.");
 429     for(int i=0;i<kNchambers;i++){
 430       branch=fLoader->TreeR()->GetBranch(Form("%sClusters%d" ,GetName(),i+1));
 431       if(branch){CreateClusters(); branch->SetAddress(&((*fClusters)[i]));}
 432     }
 433   }//R
 434   if(GetDebug())Info("SetTreeAddress","Stop.");
 435 }//void AliRICH::SetTreeAddress()
 436 //__________________________________________________________________________________________________
 437 void AliRICH::Print(Option_t *option)const
 438 {
 439 //Debug printout
 440   TObject::Print(option);
 441   P()->Print();
 442   fCounters.Print();
 443 }//void AliRICH::Print(Option_t *option)const
 444 //__________________________________________________________________________________________________
 445 void AliRICH::CreateGeometry()
 446 {
 447 //Creates detailed geometry simulation (currently GEANT volumes tree)
 448   if(GetDebug())Info("CreateGeometry","Start main.");
 449 //Opaque quartz thickness
 450   Float_t oquaThickness = .5;
 451 //CsI dimensions
 452   Float_t pcX=P()->PcSizeX();
 453   Float_t pcY=P()->PcSizeY();
 454
 455   Int_t *idtmed = fIdtmed->GetArray()-999;
 456
 457   Int_t i;
 458   Float_t zs;
 459   Int_t idrotm[1099];
 460   Float_t par[3];
 461   par[0]=68.8;par[1]=13   ;par[2]=70.86;  gMC->Gsvolu("RICH","BOX ",(*fIdtmed)[kAl], par,3);//External aluminium box
 462   par[0]=66.3;par[1]=13   ;par[2]=68.35;  gMC->Gsvolu("SRIC","BOX ",(*fIdtmed)[kAir],par,3);//Air
 463   par[0]=66.3;par[1]=0.025;par[2]=68.35;  gMC->Gsvolu("ALUM","BOX ",(*fIdtmed)[kAl], par,3);//Aluminium sheet
 464 //Air 2 (cutting the lower part of the box)
 465 //  par[0]=1.25;    par[1] = 3;    par[2] = 70.86;   gMC->Gsvolu("AIR2", "BOX ", idtmed[1000], par, 3);
 466 //Air 3 (cutting the lower part of the box)
 467 //  par[0]=66.3;    par[1] = 3;  par[2] = 1.2505;    gMC->Gsvolu("AIR3", "BOX ", idtmed[1000], par, 3);
 468 //Honeycomb
 469   par[0]=66.3;par[1]=0.188;  par[2] = 68.35;       gMC->Gsvolu("HONE", "BOX ", idtmed[1001], par, 3);
 470
 471   //par[0] = 66.5; par[1] = .025; par[2] = 63.1;
 472 //Quartz
 473   par[0]=P()->QuartzWidth()/2;par[1]=P()->QuartzThickness()/2;par[2]=P()->QuartzLength()/2;
 474   gMC->Gsvolu("QUAR", "BOX ", idtmed[1002], par, 3);
 475 //Spacers (cylinders)
 476   par[0]=0.;par[1]=.5;par[2]=P()->FreonThickness()/2;  gMC->Gsvolu("SPAC", "TUBE", idtmed[1002], par, 3);
 477 //Feet (freon slabs supports)
 478   par[0] = .7;  par[1] = .3;  par[2] = 1.9;        gMC->Gsvolu("FOOT", "BOX", idtmed[1009], par, 3);
 479 //Opaque quartz
 480   par[0]=P()->QuartzWidth()/2;par[1]= .2;par[2]=P()->QuartzLength()/2;
 481   gMC->Gsvolu("OQUA", "BOX ", idtmed[1007], par, 3);
 482 //Frame of opaque quartz
 483   par[0]=P()->OuterFreonWidth()/2;par[1]=P()->FreonThickness()/2;par[2]=P()->OuterFreonLength()/2;
 484   gMC->Gsvolu("OQF1", "BOX ", idtmed[1007], par, 3);
 485   par[0]=P()->InnerFreonWidth()/2;par[1]=P()->FreonThickness()/2;par[2]=P()->InnerFreonLength()/2;
 486   gMC->Gsvolu("OQF2", "BOX ", idtmed[1007], par, 3);
 487 //Freon
 488   par[0]=P()->OuterFreonWidth()/2 - oquaThickness;
 489   par[1]=P()->FreonThickness()/2;
 490   par[2]=P()->OuterFreonLength()/2 - 2*oquaThickness;
 491   gMC->Gsvolu("FRE1", "BOX ", idtmed[1003], par, 3);
 492
 493   par[0]=P()->InnerFreonWidth()/2 - oquaThickness;
 494   par[1]=P()->FreonThickness()/2;
 495   par[2]=P()->InnerFreonLength()/2 - 2*oquaThickness;
 496   gMC->Gsvolu("FRE2", "BOX ", idtmed[1003], par, 3);
 497 //Methane
 498   par[0]=pcX/2;par[1]=P()->GapThickness()/2;par[2]=pcY/2;         gMC->Gsvolu("META","BOX ",idtmed[1004], par, 3);
 499 //Methane gap
 500   par[0]=pcX/2;par[1]=P()->GapAmp()/2;par[2]=pcY/2;gMC->Gsvolu("GAP ","BOX ",(*fIdtmed)[kGAP],par,3);
 501 //CsI PC
 502   par[0]=pcX/2;par[1]=.25;par[2]=pcY/2;  gMC->Gsvolu("CSI ", "BOX ", (*fIdtmed)[kCSI], par, 3);
 503 //Anode grid
 504   par[0] = 0.;par[1] = .001;par[2] = 20.;  gMC->Gsvolu("GRID", "TUBE", idtmed[1006], par, 3);
 505
 506 //Wire supports
 507 //Bar of metal
 508   par[0]=pcX/2;par[1]=1.05;par[2]=1.05;  gMC->Gsvolu("WSMe", "BOX ", idtmed[1009], par, 3);
 509 //Ceramic pick up (base)
 510   par[0]=pcX/2;par[1]= .25;par[2]=1.05;  gMC->Gsvolu("WSG1", "BOX ", idtmed[1010], par, 3);
 511 //Ceramic pick up (head)
 512   par[0] = pcX/2;par[1] = .1;par[2] = .1;  gMC->Gsvolu("WSG2", "BOX ", idtmed[1010], par, 3);
 513
 514 //Aluminium supports for methane and CsI
 515 //Short bar
 516   par[0]=pcX/2;par[1]=P()->GapThickness()/2 + .25; par[2] = (68.35 - pcY/2)/2;
 517   gMC->Gsvolu("SMSH", "BOX", idtmed[1009], par, 3);
 518 //Long bar
 519   par[0]=(66.3 - pcX/2)/2;par[1]=P()->GapThickness()/2+.25;par[2]=pcY/2+68.35-pcY/2;
 520   gMC->Gsvolu("SMLG", "BOX", idtmed[1009], par, 3);
 521
 522 //Aluminium supports for freon
 523 //Short bar
 524   par[0] = P()->QuartzWidth()/2; par[1] = .3; par[2] = (68.35 - P()->QuartzLength()/2)/2;
 525   gMC->Gsvolu("SFSH", "BOX", idtmed[1009], par, 3);
 526 //Long bar
 527   par[0] = (66.3 - P()->QuartzWidth()/2)/2; par[1] = .3;
 528   par[2] = P()->QuartzLength()/2 + 68.35 - P()->QuartzLength()/2;
 529   gMC->Gsvolu("SFLG", "BOX", idtmed[1009], par, 3);
 530 //PCB backplane
 531   par[0] = pcX/2;par[1] = .25; par[2] = pcY/4 -.5025;  gMC->Gsvolu("PCB ", "BOX", idtmed[1011], par, 3);
 532
 533 //Backplane supports
 534 //Aluminium slab
 535   par[0] = 33.15;par[1] = 2;par[2] = 21.65;  gMC->Gsvolu("BACK", "BOX", idtmed[1009], par, 3);
 536 //Big hole
 537   par[0] = 9.05; par[1] = 2; par[2] = 4.4625;  gMC->Gsvolu("BKHL", "BOX", idtmed[1000], par, 3);
 538 //Small hole
 539   par[0] = 5.7;par[1] = 2;par[2] = 4.4625;  gMC->Gsvolu("BKHS", "BOX", idtmed[1000], par, 3);
 540 //Place holes inside backplane support
 541   gMC->Gspos("BKHS", 1, "BACK", .8 + 5.7,0., .6 + 4.4625, 0, "ONLY");
 542   gMC->Gspos("BKHS", 2, "BACK", -.8 - 5.7,0., .6 + 4.4625, 0, "ONLY");
 543   gMC->Gspos("BKHS", 3, "BACK", .8 + 5.7,0., -.6 - 4.4625, 0, "ONLY");
 544   gMC->Gspos("BKHS", 4, "BACK", -.8 - 5.7,0., -.6 - 4.4625, 0, "ONLY");
 545   gMC->Gspos("BKHS", 5, "BACK", .8 + 5.7,0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
 546   gMC->Gspos("BKHS", 6, "BACK", -.8 - 5.7,0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
 547   gMC->Gspos("BKHS", 7, "BACK", .8 + 5.7,0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
 548   gMC->Gspos("BKHS", 8, "BACK", -.8 - 5.7,0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
 549   gMC->Gspos("BKHL", 1, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., .6 + 4.4625, 0, "ONLY");
 550   gMC->Gspos("BKHL", 2, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., .6 + 4.4625, 0, "ONLY");
 551   gMC->Gspos("BKHL", 3, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., -.6 - 4.4625, 0, "ONLY");
 552   gMC->Gspos("BKHL", 4, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., -.6 - 4.4625, 0, "ONLY");
 553   gMC->Gspos("BKHL", 5, "BACK", .8 + 11.4+ 1.6 + 9.05, 0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
 554   gMC->Gspos("BKHL", 6, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
 555   gMC->Gspos("BKHL", 7, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
 556   gMC->Gspos("BKHL", 8, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
 557 //Place material inside RICH
 558   gMC->Gspos("SRIC", 1, "RICH", 0.,0., 0., 0, "ONLY");
 559 //  gMC->Gspos("AIR2", 1, "RICH", 66.3 + 1.2505, 1.276-P()->GapThickness()/2-P()->QuartzThickness()-P()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, 0., 0, "ONLY");
 560 //  gMC->Gspos("AIR2", 2, "RICH", -66.3 - 1.2505,1.276-P()->GapThickness()/2-P()->QuartzThickness()-P()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, 0., 0, "ONLY");
 561 //  gMC->Gspos("AIR3", 1, "RICH", 0., 1.276-P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, -68.35 - 1.25, 0, "ONLY");
 562 //  gMC->Gspos("AIR3", 2, "RICH", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35,  68.35 + 1.25, 0, "ONLY");
 563   gMC->Gspos("ALUM", 1, "SRIC", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .6 - .05 - .376 -.025, 0., 0, "ONLY");
 564   gMC->Gspos("HONE", 1, "SRIC", 0., 1.276- P()->GapThickness()/2  - P()->QuartzThickness() - P()->FreonThickness()- .4 - .6 - .05 - .188, 0., 0, "ONLY");
 565   gMC->Gspos("ALUM", 2, "SRIC", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .6 - .025, 0., 0, "ONLY");
 566   gMC->Gspos("FOOT", 1, "SRIC", 64.95, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
 567   gMC->Gspos("FOOT", 2, "SRIC", 21.65, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3 , 36.9, 0, "ONLY");
 568   gMC->Gspos("FOOT", 3, "SRIC", -21.65, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
 569   gMC->Gspos("FOOT", 4, "SRIC", -64.95, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
 570   gMC->Gspos("FOOT", 5, "SRIC", 64.95, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
 571   gMC->Gspos("FOOT", 6, "SRIC", 21.65, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
 572   gMC->Gspos("FOOT", 7, "SRIC", -21.65, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
 573   gMC->Gspos("FOOT", 8, "SRIC", -64.95, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
 574   gMC->Gspos("OQUA", 1, "SRIC", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()- .2, 0., 0, "ONLY");
 575 // Methane supports
 576   gMC->Gspos("SMLG", 1, "SRIC", pcX/2 + (66.3 - pcX/2)/2, 1.276 + .25, 0., 0, "ONLY");
 577   gMC->Gspos("SMLG", 2, "SRIC", - pcX/2 - (66.3 - pcX/2)/2, 1.276 + .25, 0., 0, "ONLY");
 578   gMC->Gspos("SMSH", 1, "SRIC", 0., 1.276 + .25, pcY/2 + (68.35 - pcY/2)/2, 0, "ONLY");
 579   gMC->Gspos("SMSH", 2, "SRIC", 0., 1.276 + .25, - pcY/2 - (68.35 - pcY/2)/2, 0, "ONLY");
 580 //Freon supports
 581   Float_t suppY = 1.276 - P()->GapThickness()/2- P()->QuartzThickness() -P()->FreonThickness() - .2 + .3; //y position of freon supports
 582   gMC->Gspos("SFLG", 1, "SRIC", P()->QuartzWidth()/2 + (66.3 - P()->QuartzWidth()/2)/2, suppY, 0., 0, "ONLY");
 583   gMC->Gspos("SFLG", 2, "SRIC", - P()->QuartzWidth()/2 - (66.3 - P()->QuartzWidth()/2)/2, suppY, 0., 0, "ONLY");
 584   gMC->Gspos("SFSH", 1, "SRIC", 0., suppY, P()->QuartzLength()/2 + (68.35 - P()->QuartzLength()/2)/2, 0, "ONLY");
 585   gMC->Gspos("SFSH", 2, "SRIC", 0., suppY, - P()->QuartzLength()/2 - (68.35 - P()->QuartzLength()/2)/2, 0, "ONLY");
 586   AliMatrix(idrotm[1019], 0., 0., 90., 0., 90., 90.);
 587 //Place spacers
 588   Int_t nspacers = 30;
 589   for (i = 0; i < nspacers/3; i++) {
 590     zs = -11.6/2 + (TMath::Abs(nspacers/6) - i) * 12.2;
 591     gMC->Gspos("SPAC", i, "FRE1", 10.5, 0., zs, idrotm[1019], "ONLY");  //Original settings
 592   }
 593   for (i = nspacers/3; i < (nspacers*2)/3; i++) {
 594     zs = -11.6/2 + (nspacers/3 + TMath::Abs(nspacers/6) - i) * 12.2;
 595     gMC->Gspos("SPAC", i, "FRE1", 0, 0., zs, idrotm[1019], "ONLY");  //Original settings
 596   }
 597   for (i = (nspacers*2)/3; i < nspacers; ++i) {
 598     zs = -11.6/2 + ((nspacers*2)/3 + TMath::Abs(nspacers/6) - i) * 12.2;
 599     gMC->Gspos("SPAC", i, "FRE1", -10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
 600   }
 601   for (i = 0; i < nspacers/3; i++) {
 602     zs = -11.6/2 + (TMath::Abs(nspacers/6) - i) * 12.2;
 603     gMC->Gspos("SPAC", i, "FRE2", 10.5, 0., zs, idrotm[1019], "ONLY");  //Original settings
 604   }
 605   for (i = nspacers/3; i < (nspacers*2)/3; i++) {
 606     zs = -11.6/2 + (nspacers/3 + TMath::Abs(nspacers/6) - i) * 12.2;
 607     gMC->Gspos("SPAC", i, "FRE2", 0, 0., zs, idrotm[1019], "ONLY");  //Original settings
 608   }
 609   for (i = (nspacers*2)/3; i < nspacers; ++i) {
 610     zs = -11.6/2 + ((nspacers*2)/3 + TMath::Abs(nspacers/6) - i) * 12.2;
 611     gMC->Gspos("SPAC", i, "FRE2", -10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
 612   }
 613   gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
 614   gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
 615   gMC->Gspos("OQF1", 1, "SRIC", P()->OuterFreonWidth()/2 + P()->InnerFreonWidth()/2 + 2, 1.276 - P()->GapThickness()/2- P()->QuartzThickness() -P()->FreonThickness()/2, 0., 0, "ONLY"); //Original settings (31.3)
 616   gMC->Gspos("OQF2", 2, "SRIC", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()/2, 0., 0, "ONLY");          //Original settings
 617   gMC->Gspos("OQF1", 3, "SRIC", - (P()->OuterFreonWidth()/2 + P()->InnerFreonWidth()/2) - 2, 1.276 - P()->GapThickness()/2 - P()->QuartzThickness() - P()->FreonThickness()/2, 0., 0, "ONLY");       //Original settings (-31.3)
 618   gMC->Gspos("QUAR", 1, "SRIC", 0., 1.276 - P()->GapThickness()/2 - P()->QuartzThickness()/2, 0., 0, "ONLY");
 619   gMC->Gspos("GAP ", 1, "META", 0., P()->GapThickness()/2 - P()->GapAmp()/2 - 0.0001, 0., 0, "ONLY");
 620   gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
 621   gMC->Gspos("CSI ", 1, "SRIC", 0., 1.276 + P()->GapThickness()/2 + .25, 0., 0, "ONLY");
 622 //Wire support placing
 623   gMC->Gspos("WSG2", 1, "GAP ", 0., P()->GapAmp()/2 - .1, 0., 0, "ONLY");
 624   gMC->Gspos("WSG1", 1, "CSI ", 0., 0., 0., 0, "ONLY");
 625   gMC->Gspos("WSMe", 1, "SRIC ", 0., 1.276 + P()->GapThickness()/2 + .5 + 1.05, 0., 0, "ONLY");
 626 //Backplane placing
 627   gMC->Gspos("BACK", 1, "SRIC ", -33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2, 43.3, 0, "ONLY");
 628   gMC->Gspos("BACK", 2, "SRIC ", 33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2 , 43.3, 0, "ONLY");
 629   gMC->Gspos("BACK", 3, "SRIC ", -33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2, 0., 0, "ONLY");
 630   gMC->Gspos("BACK", 4, "SRIC ", 33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2, 0., 0, "ONLY");
 631   gMC->Gspos("BACK", 5, "SRIC ", 33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2, -43.3, 0, "ONLY");
 632   gMC->Gspos("BACK", 6, "SRIC ", -33.15, 1.276 + P()->GapThickness()/2 + .5 + 2.1 + 2, -43.3, 0, "ONLY");
 633 //PCB placing
 634   gMC->Gspos("PCB ", 1, "SRIC ", 0.,  1.276 + P()->GapThickness()/2 + .5 + 1.05, pcX/4 + .5025 + 2.5, 0, "ONLY");
 635   gMC->Gspos("PCB ", 2, "SRIC ", 0.,  1.276 + P()->GapThickness()/2 + .5 + 1.05, -pcX/4 - .5025 - 2.5, 0, "ONLY");
 636
 637 //place chambers into mother volume ALIC
 638   for(int i=1;i<=kNchambers;i++){
 639     AliMatrix(idrotm[1000+i],C(i)->ThetaXd(),C(i)->PhiXd(),
 640                              C(i)->ThetaYd(),C(i)->PhiYd(),
 641                              C(i)->ThetaZd(),C(i)->PhiZd());
 642     gMC->Gspos("RICH",i,"ALIC",C(i)->X(),C(i)->Y(),C(i)->Z(),idrotm[1000+i], "ONLY");
 643   }
 644
 645
 646   if(GetDebug())Info("CreateGeometry","Stop main.");
 647 }//void AliRICH::CreateGeometry()
 648 //__________________________________________________________________________________________________
 649 void AliRICH::Reconstruct()const
 650 {
 651   AliRICHClusterFinder finder(const_cast<AliRICH*>(this));
 652   finder.Exec();
 653 }
 654 //__________________________________________________________________________________________________
 655 void AliRICH::ControlPlots()
 656 {
 657 //Creates a set of hists to control the results of simulation
 658
 659   TH1F *pHxD=0,*pHyD=0,*pNumClusH1=0,
 660                    *pQdcH1=0,       *pSizeH1=0,
 661                    *pPureMipQdcH1=0,*pPureMipSizeH1=0,
 662                    *pPureCerQdcH1=0,*pPureCerSizeH1=0,
 663                    *pPureFeeQdcH1=0,*pPureFeeSizeH1=0,
 664                    *pMipQdcH1=0,    *pPhotQdcH1=0;
 665   TH2F *pMapH2=0,*pPureMipMapH2=0,*pPureCerMapH2=0,*pPureFeeMapH2=0;
 666
 667   Bool_t isDig =!GetLoader()->LoadDigits();
 668   Bool_t isClus=!GetLoader()->LoadRecPoints();
 669
 670   if(!isDig && !isClus){Error("ControlPlots","No digits and clusters! Nothing to do.");return;}
 671
 672   TStopwatch sw;TDatime time;
 673
 674   TFile *pFile = new TFile("$(HOME)/RCP.root","RECREATE");
 675
 676   if(isDig){
 677     cout<<"Digits available\n";
 678     pHxD=new TH1F("HitDigitDiffX","Hit-Digits diff X all chambers;diff [cm]",100,-10,10);
 679     pHyD=new TH1F("HitDigitDiffY","Hit-Digits diff Y all chambers;diff [cm]",100,-10,10);
 680   }//isDig
 681
 682   if(isClus){
 683     cout<<"Clusters available\n";
 684     pNumClusH1=new TH1F("NumClusPerEvent","Number of clusters per event;number",50,0,49);
 685
 686     pQdcH1        =new TH1F("ClusQdc",   "Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 687     pSizeH1       =new TH1F("ClusSize",  "Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 688     pMapH2        =new TH2F("ClusMap",   "Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 689
 690     pMipQdcH1     =new TH1F("QdcMip"      ,"MIP Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 691     pPhotQdcH1    =new TH1F("QdcPhot"     ,"Cer+Fee Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 692
 693     pPureMipQdcH1 =new TH1F("QdcPureMip"  ,"MIP only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 694     pPureMipSizeH1=new TH1F("SizePureMip" ,"MIP only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 695     pPureMipMapH2 =new TH2F("MapPureMip"  ,"MIP only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 696
 697     pPureCerQdcH1 =new TH1F("QdcPureCer"  ,"Cerenkov only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 698     pPureCerSizeH1=new TH1F("SizePureCer" ,"Cernekov only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 699     pPureCerMapH2 =new TH2F("MapPureCer"  ,"Cerenkov only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 700
 701     pPureFeeQdcH1 =new TH1F("QdcPureFee"  ,"Feedback only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 702     pPureFeeSizeH1=new TH1F("SizePureFee" ,"Feedback only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 703     pPureFeeMapH2 =new TH2F("MapPureFee"  ,"Feedback only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 704   }//isClus
 705
 706   for(Int_t iEvtN=0;iEvtN < GetLoader()->GetRunLoader()->GetAliRun()->GetEventsPerRun();iEvtN++){//events loop
 707     GetLoader()->GetRunLoader()->GetEvent(iEvtN);    //gets current event
 708
 709     if(!GetLoader()->TreeH()) GetLoader()->LoadHits();
 710     for(Int_t iPrimN=0;iPrimN < GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 711        GetLoader()->TreeH()->GetEntry(iPrimN);
 712     }
 713
 714     if(isClus) GetLoader()->TreeR()->GetEntry(0);
 715     if(isDig)  GetLoader()->TreeD()->GetEntry(0);
 716
 717     for(Int_t iChamN=1;iChamN<=7;iChamN++){//chambers loop
 718       if(isClus){
 719         Int_t iNclusCham=Clusters(iChamN)->GetEntries(); if(iNclusCham) pNumClusH1->Fill(iNclusCham);//number of clusters per event
 720         for(Int_t iClusN=0;iClusN<iNclusCham;iClusN++){//clusters loop
 721           AliRICHcluster *pClus=(AliRICHcluster*)Clusters(iChamN)->At(iClusN);
 722                                        pQdcH1        ->Fill(pClus->Q());
 723                                        pSizeH1       ->Fill(pClus->Size());
 724                                        pMapH2        ->Fill(pClus->X(),pClus->Y()); //common
 725
 726            if(pClus->IsSingleMip())     {pPureMipQdcH1 ->Fill(pClus->Q());
 727                                        pPureMipSizeH1->Fill(pClus->Size());
 728                                        pPureMipMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Mips
 729
 730            if(pClus->IsSingleCerenkov()){pPureCerQdcH1 ->Fill(pClus->Q());
 731                                        pPureCerSizeH1->Fill(pClus->Size());
 732                                        pPureCerMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Cerenkovs
 733
 734            if(pClus->IsSingleFeedback()){pPureFeeQdcH1 ->Fill(pClus->Q());
 735                                        pPureFeeSizeH1->Fill(pClus->Size());
 736                                        pPureFeeMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Feedbacks
 737
 738            if(pClus->IsMip()) {pMipQdcH1 ->Fill(pClus->Q());} //MIP+ other contributions
 739            if(!pClus->IsPureMip())     pPhotQdcH1->Fill(pClus->Q());  //not MIP
 740         }//clusters loop
 741       }//isClus
 742       if(isDig){
 743         for(Int_t iDigN=0;iDigN<R()->Digits(iChamN)->GetEntries();iDigN++){//digits loop
 744           AliRICHdigit *pDig=(AliRICHdigit*)R()->Digits(iChamN)->At(iDigN);
 745           AliRICHhit   *pHit=Hit(pDig->GetTrack(0));
 746           TVector2 hitV2=R()->C(iChamN)->Glob2Loc(pHit->OutX3()); TVector2 digV2=R()->P()->Pad2Loc(pDig->Pad());
 747           pHxD->Fill(hitV2.X()-digV2.X()); pHyD->Fill(hitV2.Y()-digV2.Y());
 748         }//digits loop
 749       }//isDig
 750     }//chambers loop
 751     Info("ControlPlots","Event %i processed.",iEvtN);
 752   }//events loop
 753
 754   if(isDig)  GetLoader()->UnloadDigits();
 755   if(isClus) GetLoader()->UnloadRecPoints();
 756
 757   pFile->Write(); delete pFile;
 758   sw.Print();time.Print();
 759 }//ControlPlots()
 760 //__________________________________________________________________________________________________
 761 AliRICHhit* AliRICH::Hit(Int_t tid)
 762 {
 763 //defines which hit provided by given tid for the currently loaded event
 764   R()->GetLoader()->LoadHits();
 765   for(Int_t iPrimN=0;iPrimN<R()->GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 766     R()->GetLoader()->TreeH()->GetEntry(iPrimN);
 767     for(Int_t iHitN=0;iHitN<R()->Hits()->GetEntries();iHitN++){
 768       AliRICHhit *pHit=(AliRICHhit*)R()->Hits()->At(iHitN);
 769       if(tid==pHit->Track()) {R()->GetLoader()->UnloadHits();return pHit;}
 770     }//hits
 771   }//prims loop
 772   R()->GetLoader()->UnloadHits();
 773   return 0;
 774 }
 775 //__________________________________________________________________________________________________
 776 void AliRICH::PrintHits(Int_t iEvtN)
 777 {
 778 //Prints a list of RICH hits for a given event. Default is event number 0.
 779   Info("PrintHits","List of RICH hits for event %i",iEvtN);
 780   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 781   if(R()->GetLoader()->LoadHits()) return;
 782
 783   Int_t iTotalHits=0;
 784   for(Int_t iPrimN=0;iPrimN<R()->GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 785     R()->GetLoader()->TreeH()->GetEntry(iPrimN);
 786     R()->Hits()->Print();
 787     iTotalHits+=R()->Hits()->GetEntries();
 788   }
 789   R()->GetLoader()->UnloadHits();
 790   Info("PrintHits","totally %i hits",iTotalHits);
 791 }
 792 //__________________________________________________________________________________________________
 793 void AliRICH::PrintSDigits(Int_t iEvtN)
 794 {
 795 //prints a list of RICH sdigits  for a given event
 796   Info("PrintSDigits","List of RICH sdigits for event %i",iEvtN);
 797   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 798   if(R()->GetLoader()->LoadSDigits()) return;
 799
 800   R()->GetLoader()->TreeS()->GetEntry(0);
 801   R()->SDigits()->Print();
 802   R()->GetLoader()->UnloadSDigits();
 803   Info("PrintSDigits","totally %i sdigits",R()->SDigits()->GetEntries());
 804 }
 805 //__________________________________________________________________________________________________
 806 void AliRICH::PrintDigits(Int_t iEvtN)
 807 {
 808 //prints a list of RICH digits  for a given event
 809   Info("PrintDigits","List of RICH digits for event %i",iEvtN);
 810   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 811   if(R()->GetLoader()->LoadDigits()) return;
 812
 813   Int_t iTotalDigits=0;
 814   R()->GetLoader()->TreeD()->GetEntry(0);
 815   for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){
 816     R()->Digits(iChamber)->Print();
 817     iTotalDigits+=R()->Digits(iChamber)->GetEntries();
 818   }
 819   R()->GetLoader()->UnloadDigits();
 820   Info("PrintDigits","totally %i Digits",iTotalDigits);
 821 }
 822 //__________________________________________________________________________________________________
 823 void AliRICH::PrintClusters(Int_t iEvtN)
 824 {
 825 //prints a list of RICH clusters  for a given event
 826   Info("PrintClusters","List of RICH clusters for event %i",iEvtN);
 827   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 828   if(R()->GetLoader()->LoadRecPoints()) return;
 829
 830   Int_t iTotalClusters=0;
 831   R()->GetLoader()->TreeR()->GetEntry(0);
 832   for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){
 833     R()->Clusters(iChamber)->Print();
 834     iTotalClusters+=R()->Clusters(iChamber)->GetEntries();
 835   }
 836   R()->GetLoader()->UnloadRecPoints();
 837   Info("PrintClusters","totally %i clusters",iTotalClusters);
 838 }
 839 //__________________________________________________________________________________________________
 840 void AliRICH::FillESD(AliESD *pESD)const
 841 {
 842 //This methode fills AliESDtrack with information from RICH
 843   Info("FillESD","Start with %i tracks",pESD->GetNumberOfTracks());
 844   const Double_t masses[5]={0.000511,0.105658,0.139567,0.493677,0.93828};//electron,muon,pion,kaon,proton
 845   const Double_t refIndex = 1.29052;
 846
 847   Double_t thetaExp = 0.7;
 848   Double_t thetaTh[5];
 849   Double_t sinThetaThNorm;
 850   Double_t sigmaThetaTh[5];
 851   Double_t height[5];
 852   Double_t totalHeight=0;
 853
 854   for(Int_t iTrackN=0;iTrackN<pESD->GetNumberOfTracks();iTrackN++){//ESD tracks loop
 855     AliESDtrack *pTrack = pESD->GetTrack(iTrackN);
 856
 857     pTrack->Print("");
 858 //    TVector2 x2=P()->HelixCross(pTrack);//returns cross point of track with RICH PC in LRS
 859     Double_t pmod = pTrack->GetP();
 860
 861     for(Int_t iPart=4;iPart>=0;iPart--){
 862       Double_t cosThetaTh = TMath::Sqrt(masses[iPart]*masses[iPart]+pmod*pmod)/(refIndex*pmod);
 863       if(cosThetaTh>=1) {break;}
 864       thetaTh[iPart] = TMath::ACos(cosThetaTh);
 865       sinThetaThNorm = TMath::Sin(thetaTh[iPart])/TMath::Sqrt(1-1/(refIndex*refIndex));
 866       sigmaThetaTh[iPart] = (0.014*(1/sinThetaThNorm-1) + 0.0043)*1.25;
 867       height[iPart] = TMath::Gaus(thetaExp,thetaTh[iPart],sigmaThetaTh[iPart]);
 868       totalHeight +=height[iPart];
 869     }
 870
 871     pTrack->SetRICHsignal(thetaExp);
 872     Double_t richPID[5];
 873     for(Int_t iPart=0;iPart<5;iPart++) richPID[iPart] = height[iPart]/totalHeight;
 874     pTrack->SetRICHpid(richPID);
 875   }//ESD tracks loop
 876 }