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 #include <AliLog.h>
  39
  40 ClassImp(AliRICHhit)
  41 //__________________________________________________________________________________________________
  42 void AliRICHhit::Print(Option_t*)const
  43 {
  44   AliInfo(Form("Ch=%1i, TID=%6i, eloss=%9.3f eV, in-out dist=%9.4f, OUT(%7.2f,%7.2f,%7.2f)"
  45       ,fChamber,fTrack,fEloss*1e9,Length(),fOutX3.X(),fOutX3.Y(),fOutX3.Z()));
  46 }
  47 //__________________________________________________________________________________________________
  48 ClassImp(AliRICHdigit)
  49 //__________________________________________________________________________________________________
  50 void AliRICHdigit::Print(Option_t*)const
  51 {
  52   AliInfo(Form("cfm=%9i, cs=%2i, x=%3i, y=%3i, q=%8.3f, TID1=%5i, TID2=%5i, TID3=%5i",
  53                   fCFM,fChamber,fPadX,fPadY,fQdc,fTracks[0],fTracks[1],fTracks[2]));
  54 }
  55 //__________________________________________________________________________________________________
  56 ClassImp(AliRICHcluster)
  57 //__________________________________________________________________________________________________
  58 void AliRICHcluster::Print(Option_t*)const
  59 {
  60   char *status=0;
  61   switch(fStatus){
  62     case      kRaw: status="raw"     ;break;
  63     case kResolved: status="resolved";break;
  64     case    kEmpty: status="empty"   ;break;
  65   }
  66   if(fDigits)
  67     ::Info("cluster","cfm=%10i, cs=%2i, SiMa=%6i, Shape=%5i, x=%7.3f, y=%7.3f, Q=%6i, %s with %i digits",
  68                              fCFM,fChamber,fSize,fShape,fX,fY,fQdc,status,fDigits->GetEntriesFast());
  69   else
  70     AliInfo(Form("cfm=%10i, cs=%2i, SiMa=%6i, Shape=%5i, x=%7.3f, y=%7.3f, Q=%6i, %s with %i digits",
  71                              fCFM,fChamber,fSize,fShape,fX,fY,fQdc,status,0));
  72
  73 }
  74 //__________________________________________________________________________________________________
  75 ClassImp(AliRICH)
  76 //__________________________________________________________________________________________________
  77 // RICH manager class
  78 //BEGIN_HTML
  79 /*
  80   <img src="gif/alirich.gif">
  81 */
  82 //END_HTML
  83 //__________________________________________________________________________________________________
  84 AliRICH::AliRICH():AliDetector(),fpParam(0),  fSdigits(0),fNsdigits(0),fDigitsNew(0),fClusters(0)
  85 {
  86 //Default ctor should not contain any new operators
  87 //AliDetector ctor deals with Hits and Digits
  88   for(int i=0;i<kNchambers;i++) fNdigitsNew[i]  =0;
  89   for(int i=0;i<kNchambers;i++) fNclusters[i]=0;
  90 //  fCounters.ResizeTo(20); fCounters.Zero();
  91 }//AliRICH::AliRICH()
  92 //__________________________________________________________________________________________________
  93 AliRICH::AliRICH(const char *name, const char *title)
  94         :AliDetector(name,title),fpParam(new AliRICHParam),fSdigits(0),fNsdigits(0),fDigitsNew(0),fClusters(0)
  95 {
  96 //Named ctor
  97   AliDebug(1,"Start.");
  98 //AliDetector ctor deals with Hits and Digits (reset them to 0, does not create them)
  99   CreateHits();          gAlice->GetMCApp()->AddHitList(fHits);
 100   fCounters.ResizeTo(20); fCounters.Zero();
 101   AliDebug(1,"Stop.");
 102 }//AliRICH::AliRICH(const char *name, const char *title)
 103 //__________________________________________________________________________________________________
 104 AliRICH::~AliRICH()
 105 {
 106 //dtor
 107   AliDebug(1,"Start.");
 108
 109   if(fpParam)    delete fpParam;
 110
 111   if(fHits)      delete fHits;
 112   if(fSdigits)   delete fSdigits;
 113   if(fDigits)    delete fDigits;
 114   if(fDigitsNew) {fDigitsNew->Delete();   delete fDigitsNew;}
 115   if(fClusters)  {fClusters->Delete();    delete fClusters;}
 116   AliDebug(1,"Stop.");
 117 }//AliRICH::~AliRICH()
 118 //__________________________________________________________________________________________________
 119 void AliRICH::Hits2SDigits()
 120 {
 121 // Create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
 122   AliDebug(1,"Start.");
 123   for(Int_t iEventN=0;iEventN<GetLoader()->GetRunLoader()->GetAliRun()->GetEventsPerRun();iEventN++){//events loop
 124     GetLoader()->GetRunLoader()->GetEvent(iEventN);//get next event
 125
 126     if(!GetLoader()->TreeH()) GetLoader()->LoadHits();    GetLoader()->GetRunLoader()->LoadHeader();
 127                                                           GetLoader()->GetRunLoader()->LoadKinematics();//from
 128     if(!GetLoader()->TreeS()) GetLoader()->MakeTree("S"); MakeBranch("S");//to
 129
 130     for(Int_t iPrimN=0;iPrimN<GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 131       GetLoader()->TreeH()->GetEntry(iPrimN);
 132       for(Int_t iHitN=0;iHitN<Hits()->GetEntries();iHitN++){//hits loop
 133         AliRICHhit *pHit=(AliRICHhit*)Hits()->At(iHitN);//get current hit
 134         TVector2 x2 = C(pHit->C())->Mrs2Pc(pHit->OutX3());//hit position in photocathode plane
 135         Int_t iTotQdc=P()->TotQdc(x2,pHit->Eloss());//total charge produced by hit, 0 if hit in dead zone
 136         if(iTotQdc==0) continue;
 137         //
 138         //need to quantize the anod....
 139         TVector padHit=AliRICHParam::Loc2Pad(x2);
 140         TVector2 padHitXY=AliRICHParam::Pad2Loc(padHit);
 141         TVector2 anod;
 142         if((x2.Y()-padHitXY.Y())>0) anod.Set(x2.X(),padHitXY.Y()+AliRICHParam::PitchAnod()/2);
 143         else anod.Set(x2.X(),padHitXY.Y()-AliRICHParam::PitchAnod()/2);
 144         //end to quantize anod
 145         //
 146         TVector area=P()->Loc2Area(anod);//determine affected pads, dead zones analysed inside
 147         AliDebug(1,Form("hitanod(%6.2f,%6.2f)->area(%3.0f,%3.0f)-(%3.0f,%3.0f) QDC=%4i",anod.X(),anod.Y(),area[0],area[1],area[2],area[3],iTotQdc));
 148         TVector pad(2);
 149         for(pad[1]=area[1];pad[1]<=area[3];pad[1]++)//affected pads loop
 150           for(pad[0]=area[0];pad[0]<=area[2];pad[0]++){
 151             Double_t padQdc=iTotQdc*P()->FracQdc(anod,pad);
 152             AliDebug(1,Form("current pad(%3.0f,%3.0f) with QDC  =%6.2f",pad[0],pad[1],padQdc));
 153             if(padQdc>0.1) AddSDigit(pHit->C(),pad,padQdc,GetLoader()->GetRunLoader()->Stack()->Particle(pHit->GetTrack())->GetPdgCode(),pHit->GetTrack());
 154           }//affected pads loop
 155       }//hits loop
 156     }//prims loop
 157     GetLoader()->TreeS()->Fill();
 158     GetLoader()->WriteSDigits("OVERWRITE");
 159     ResetSDigits();
 160   }//events loop
 161   GetLoader()->UnloadHits(); GetLoader()->GetRunLoader()->UnloadHeader(); GetLoader()->GetRunLoader()->UnloadKinematics();
 162   GetLoader()->UnloadSDigits();
 163   AliDebug(1,"Stop.");
 164 }//Hits2SDigits()
 165 //__________________________________________________________________________________________________
 166 void AliRICH::BuildGeometry()
 167 {
 168 //Builds a TNode geometry for event display
 169   AliInfo("Start.");
 170
 171   TNode *node, *subnode, *top;
 172   top=gAlice->GetGeometry()->GetNode("alice");
 173
 174   Float_t widx=P()->SectorSizeX();
 175   Float_t leny=P()->SectorSizeY();
 176   Float_t dz = P()->Zfreon()+P()->Zwin()+P()->Pc2Win();
 177   Float_t dead = P()->DeadZone();
 178
 179   new TBRIK("RICH","RICH","void",widx+dead/2,leny+leny/2+dead,dz+0.1); //RICH chamber
 180   new TBRIK("RPC" ,"RPC" ,"void",widx/2,leny/2,0.01);                  //RICH sector
 181
 182   for(int i=1;i<=kNchambers;i++){
 183     top->cd();
 184     node = new TNode(Form("RICH%i",i),Form("RICH%i",i),"RICH",C(i)->Center().X(),C(i)->Center().Y(),C(i)->Center().Z(),C(i)->RotMatrixName());
 185     node->SetLineColor(kRed);
 186     node->cd();
 187     subnode = new TNode("PHOTO1","PHOTO1","RPC",-widx/2-dead/2,-leny-dead/2,dz,"");
 188     subnode->SetLineColor(kGreen);
 189     fNodes->Add(subnode);
 190     subnode = new TNode("PHOTO1","PHOTO1","RPC", widx/2+dead/2,-leny-dead/2,dz,"");
 191     subnode->SetLineColor(kGreen);
 192     fNodes->Add(subnode);
 193     subnode = new TNode("PHOTO1","PHOTO1","RPC",-widx/2-dead/2,           0,dz,"");
 194     subnode->SetLineColor(kGreen);
 195     fNodes->Add(subnode);
 196     subnode = new TNode("PHOTO1","PHOTO1","RPC", widx/2+dead/2,           0,dz,"");
 197     subnode->SetLineColor(kGreen);
 198     fNodes->Add(subnode);
 199     subnode = new TNode("PHOTO1","PHOTO1","RPC",-widx/2-dead/2, leny+dead/2,dz,"");
 200     subnode->SetLineColor(kGreen);
 201     fNodes->Add(subnode);
 202     subnode = new TNode("PHOTO1","PHOTO1","RPC", widx/2+dead/2, leny+dead/2,dz,"");
 203     subnode->SetLineColor(kGreen);
 204     fNodes->Add(subnode);
 205     fNodes->Add(node);
 206   }
 207
 208   AliDebug(1,"Stop.");
 209 }//void AliRICH::BuildGeometry()
 210
 211 //______________________________________________________________________________
 212 void AliRICH::CreateMaterials()
 213 {
 214 // Definition of available RICH materials
 215
 216   Int_t   material=0; //tmp material id number
 217   Float_t a=0,z=0,den=0,radl=0,absl=0; //tmp material parameters
 218   Float_t tmaxfd=-10.0, deemax=-0.2, stemax=-0.1,epsil=0.001, stmin=-0.001;
 219   Int_t   isxfld = gAlice->Field()->Integ();
 220   Float_t sxmgmx = gAlice->Field()->Max();
 221
 222   Float_t aAir[4]={12.,14.,16.,36.};  Float_t zAir[4]={6.,7.,8.,18.}; Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};//total 0.9999999
 223   AliMixture(++material, "RichAir",aAir,zAir,den=0.00120479,4,wAir);                                          //1 (Air) 0.01% C 75% N  23% O 1% Ar
 224   AliMedium(kAir, "RichAir",material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 225
 226   AliMaterial(++material, "RichRohacell", a=12.01,z=6.0, den=0.1,     radl=18.8,   absl=0);                   //2 Rohacell 51 C-equiv radl rad cover
 227   AliMedium(kRoha, "RichRohacell", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 228
 229   Float_t  aQuartz[2]={28.09,16.0};  Float_t  zQuartz[2]={14.00, 8.0};  Float_t  wQuartz[2]={1,2};
 230   AliMixture(++material, "RichSiO2",aQuartz,zQuartz,den=2.64,-2, wQuartz);                                    //3 Quarz (SiO2) -trasparent rad window
 231   AliMedium(kSiO2, "RichSiO2",material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 232
 233   Float_t  aFreon[2]={12,19};  Float_t  zFreon[2]={6,9};  Float_t wmatFreon[2]={6,14};
 234   AliMixture(++material, "RichC6F14",aFreon,zFreon,den=1.68,-2,wmatFreon);                                    //4 Freon (C6F14)
 235   AliMedium(kC6F14, "RichC6F14",material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 236
 237   Float_t aMethane[2]={12.01,1}; Float_t zMethane[2]={6,1}; Float_t wMethane[2]={1,4};
 238   AliMixture (++material, "RichCH4", aMethane, zMethane, den=7.17e-4,-2, wMethane);                        //5,9 methane (CH4) normal and for Gap
 239   AliMedium(kCH4, "RichCH4"   , material, 1, isxfld, sxmgmx, tmaxfd, stemax,  deemax, epsil,  stmin);
 240   AliMixture (++material, "RichCH4", aMethane, zMethane, den=7.17e-4,-2, wMethane);                        //5,9 methane (CH4) normal and for Gap
 241   AliMedium(kGap, "RichCH4gap$", material, 1, isxfld, sxmgmx, tmaxfd, 0.1   , -deemax, epsil, -stmin);
 242
 243   AliMaterial(++material, "RichCsI",      a=12.01,z=6.0, den=0.1,     radl=18.8,   absl=0);                   //6 CsI-radl equivalent
 244   AliMedium(kCsI, "RichCsI$", material, 1, isxfld, sxmgmx,tmaxfd, stemax, deemax, epsil, stmin);
 245
 246   AliMaterial(++material, "GridCu",    a=63.54,z=29.0,den=8.96,    radl=1.43,   absl=0);                   //7 anode grid (Cu)
 247   AliMedium(kGridCu, "GRID$", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 248
 249   AliMixture (++material, "OpSiO2",aQuartz, zQuartz, den=2.64, -2, wQuartz);                             //8 Quarz (SiO2) - opaque
 250   AliMedium(kOpSiO2, "QUARTZO$",material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 251
 252   AliMaterial(++material, "ALUM",     a=26.98,z=13.0,den=2.699,     radl=8.9,    absl=0);                 //10 aluminium sheet (Al)
 253   AliMedium(kAl, "ALUMINUM$", material, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 254
 255   Float_t aGlass[5]={12.01,28.09,16,10.8,23}; Float_t zGlass[5]={6,14,8,5,11};  Float_t wGlass[5]={0.5,0.105,0.355,0.03,0.01};
 256   AliMixture(++material,"GLASS",aGlass, zGlass, den=1.74, 5, wGlass);                                    //11 Glass 50%-C 10.5%-Si 35.5%-O 3%-B 1%-Na
 257   AliMedium(kGlass, "GLASS", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 258
 259   AliMaterial(++material, "COPPER$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);                   //12 Cu
 260   AliMedium(kCu, "PCB_COPPER", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 261
 262
 263   AliMaterial(++material, "W$",  a=183.84,z=74.0,den=19.3,    radl=0.35,    absl=185.0/den);              //13 W - anod wires
 264   AliMedium(kW, "W", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 265
 266
 267   if(P()->IsRadioSrc()){
 268     AliInfo("Special radioactive source materials");
 269     AliMaterial(++material, "STEEL$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);                  //14 Steel
 270     AliMedium(kSteel, "STEEL", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 271
 272     AliMaterial(++material, "PERPEX$",  a=63.54,z=29.0,den=8.96,    radl=1.4,    absl=0);                 //15 Perpex
 273     AliMedium(kPerpex, "PERPEX", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 274
 275     AliMaterial(++material, "STRONZIUM$",  a=87.62,z=38.0,den=2.54,    radl=4.24,    absl=0);             //16 Sr90
 276     AliMedium(kSr90, "STRONZIUM", material, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 277   }
 278
 279 //Optical properties:
 280 #include "Opticals.h"
 281   gMC->SetCerenkov((*fIdtmed)[kAir]      , kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);       //1 Air
 282   gMC->SetCerenkov((*fIdtmed)[kRoha]     , kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);       //2 Honeycomb
 283   gMC->SetCerenkov((*fIdtmed)[kSiO2]     , kNbins, aPckov, aAbsSiO2,   aQeAll, aIdxSiO2);      //3 Quartz SiO2
 284   gMC->SetCerenkov((*fIdtmed)[kC6F14]    , kNbins, aPckov, aAbsC6F14,  aQeAll, aIdxC6F14);     //4 Freon C6F14
 285   gMC->SetCerenkov((*fIdtmed)[kCH4]      , kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);       //5 Methane CH4
 286   gMC->SetCerenkov((*fIdtmed)[kCsI]      , kNbins, aPckov, aAbsCsI,    aQeCsI, aIdxCH4);       //6 CsI
 287   gMC->SetCerenkov((*fIdtmed)[kGridCu]   , kNbins, aPckov, aAbsGrid,   aQeAll, aIdxGrid);      //7 grid Cu
 288   gMC->SetCerenkov((*fIdtmed)[kOpSiO2]   , kNbins, aPckov, aAbsOpSiO2, aQeAll, aIdxOpSiO2);    //8 Opaque quartz SiO2
 289   gMC->SetCerenkov((*fIdtmed)[kGap]      , kNbins, aPckov, aAbsCH4,    aQeAll, aIdxCH4);       //9 Special methane gap
 290   gMC->SetCerenkov((*fIdtmed)[kAl]       , kNbins, aPckov, aAbsGrid,   aQeAll, aIdxGrid);      //10 Aluminium
 291   gMC->SetCerenkov((*fIdtmed)[kGlass]    , kNbins, aPckov, aAbsOpSiO2, aQeAll, aIdxOpSiO2);    //11 Glass
 292 }//void AliRICH::CreateMaterials()
 293 //__________________________________________________________________________________________________
 294 Float_t AliRICH::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)const
 295 {
 296
 297     //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
 298
 299     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,
 300                       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,
 301                       7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
 302     Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
 303                         2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
 304                         2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
 305                         1.72,1.53};
 306     Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
 307                         0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
 308                         0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
 309                         1.714,1.498};
 310     Float_t xe=ene;
 311     Int_t  j=Int_t(xe*10)-49;
 312     Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
 313     Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
 314
 315     //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
 316     //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
 317
 318     Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
 319     Float_t tanin=sinin/pdoti;
 320
 321     Float_t c1=cn*cn-ck*ck-sinin*sinin;
 322     Float_t c2=4*cn*cn*ck*ck;
 323     Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
 324     Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
 325
 326     Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
 327     Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
 328
 329
 330     //CORRECTION FACTOR FOR SURFACE ROUGHNESS
 331     //B.J. STAGG  APPLIED OPTICS, 30(1991),4113
 332
 333     Float_t sigraf=18.;
 334     Float_t lamb=1240/ene;
 335     Float_t fresn;
 336
 337     Float_t  rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
 338
 339     if(pola)
 340     {
 341         Float_t pdotr=0.8;                                 //DEGREE OF POLARIZATION : 1->P , -1->S
 342         fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
 343     }
 344     else
 345         fresn=0.5*(rp+rs);
 346
 347     fresn = fresn*rO;
 348     return(fresn);
 349 }//Fresnel()
 350 //__________________________________________________________________________________________________
 351 Float_t AliRICH::AbsoCH4(Float_t x)const
 352 {
 353 //Evaluate the absorbtion lenght of CH4
 354   Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.};              //MB X 10^22
 355   Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
 356   const Float_t kLoschmidt=2.686763e19;                                      // LOSCHMIDT NUMBER IN CM-3
 357   const Float_t kPressure=750.,kTemperature=283.;
 358   const Float_t kPn=kPressure/760.;
 359   const Float_t kTn=kTemperature/273.16;
 360   const Float_t kC0=-1.655279e-1;
 361   const Float_t kC1=6.307392e-2;
 362   const Float_t kC2=-8.011441e-3;
 363   const Float_t kC3=3.392126e-4;
 364
 365   Float_t crossSection=0;
 366   if (x<7.75)
 367     crossSection=.06e-22;
 368   else if(x>=7.75 && x<=8.1){                 //------ METHANE CROSS SECTION cm-2 ASTROPH. J. 214, L47 (1978)
 369         crossSection=(kC0+kC1*x+kC2*x*x+kC3*x*x*x)*1.e-18;
 370   }else if (x> 8.1){
 371     Int_t j=0;
 372     while (x<=em[j] || x>=em[j+1]){
 373       j++;
 374       Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
 375       crossSection=(sch4[j]+a*(x-em[j]))*1e-22;
 376     }
 377   }//if
 378
 379     Float_t density=kLoschmidt*kPn/kTn; //CH4 molecular density 1/cm-3
 380     return 1./(density*crossSection);
 381 }//AbsoCH4()
 382 //__________________________________________________________________________________________________
 383 void AliRICH::MakeBranch(Option_t* option)
 384 {
 385 //Create Tree branches for the RICH.
 386   AliDebug(1,Form("Start with option= %s.",option));
 387
 388   const Int_t kBufferSize = 4000;
 389
 390   const char *cH = strstr(option,"H");
 391   const char *cD = strstr(option,"D");
 392   const char *cR = strstr(option,"R");
 393   const char *cS = strstr(option,"S");
 394
 395   if(cH&&TreeH()){//H
 396     CreateHits();      //branch will be created in AliDetector::MakeBranch
 397   }//H
 398   AliDetector::MakeBranch(option);//this is after cH because we need to guarantee that fHits array is created
 399
 400   if(cS&&fLoader->TreeS()){//S
 401     CreateSDigits();   MakeBranchInTree(fLoader->TreeS(),"RICH",&fSdigits,kBufferSize,0) ;
 402   }//S
 403
 404   if(cD&&fLoader->TreeD()){//D
 405     CreateDigits();
 406     for(Int_t i=0;i<kNchambers;i++){
 407       MakeBranchInTree(fLoader->TreeD(),Form("%s%d",GetName(),i+1),&((*fDigitsNew)[i]),kBufferSize,0);
 408     }
 409   }//D
 410
 411   if(cR&&fLoader->TreeR()){//R
 412     CreateClusters();
 413     for(Int_t i=0;i<kNchambers;i++)
 414       MakeBranchInTree(fLoader->TreeR(),Form("%sClusters%d",GetName(),i+1), &((*fClusters)[i]), kBufferSize, 0);
 415   }//R
 416   AliDebug(1,"Stop.");
 417 }//void AliRICH::MakeBranch(Option_t* option)
 418 //__________________________________________________________________________________________________
 419 void AliRICH::SetTreeAddress()
 420 {
 421 //Set branch address for the Hits and Digits Tree.
 422   AliDebug(1,"Start.");
 423
 424   TBranch *branch;
 425
 426   if(fLoader->TreeH()){//H
 427     AliDebug(1,"tree H is requested.");
 428     CreateHits();//branch map will be in AliDetector::SetTreeAddress
 429   }//H
 430   AliDetector::SetTreeAddress();//this is after TreeH because we need to guarantee that fHits array is created
 431
 432   if(fLoader->TreeS()){//S
 433     AliDebug(1,"tree S is requested.");
 434     branch=fLoader->TreeS()->GetBranch(GetName());        if(branch){CreateSDigits();   branch->SetAddress(&fSdigits);}
 435   }//S
 436
 437   if(fLoader->TreeD()){//D
 438     AliDebug(1,"tree D is requested.");
 439     for(int i=0;i<kNchambers;i++){
 440       branch=fLoader->TreeD()->GetBranch(Form("%s%d",GetName(),i+1));
 441       if(branch){CreateDigits(); branch->SetAddress(&((*fDigitsNew)[i]));}
 442     }
 443   }//D
 444
 445   if(fLoader->TreeR()){//R
 446     AliDebug(1,"tree R is requested.");
 447     for(int i=0;i<kNchambers;i++){
 448       branch=fLoader->TreeR()->GetBranch(Form("%sClusters%d" ,GetName(),i+1));
 449       if(branch){CreateClusters(); branch->SetAddress(&((*fClusters)[i]));}
 450     }
 451   }//R
 452   AliDebug(1,"Stop.");
 453 }//void AliRICH::SetTreeAddress()
 454 //__________________________________________________________________________________________________
 455 void AliRICH::Print(Option_t *option)const
 456 {
 457 //Debug printout
 458   TObject::Print(option);
 459   P()->Print();
 460   fCounters.Print();
 461 }//void AliRICH::Print(Option_t *option)const
 462 //__________________________________________________________________________________________________
 463 void AliRICH::CreateGeometry()
 464 {
 465 //Creates detailed geometry simulation (currently GEANT volumes tree)
 466   AliDebug(1,"Start main.");
 467   Double_t cm=1,mm=0.1*cm,mkm=0.001*cm;
 468   Float_t par[3];
 469   Int_t id=0;
 470
 471 //place chambers into mother volume ALIC
 472   par[0]=(6*mm+1681*mm+6*mm)/2;par[1]=(6*mm+1466*mm+6*mm)/2;par[2]=(80*mm+40*mm)*2/2;gMC->Gsvolu("RICH","BOX ",(*fIdtmed)[kCH4],par,3);//2033P1  z p84 TDR
 473   if(P()->IsRadioSrc()){
 474     AliInfo("Special test beam geometry");
 475     gMC->Gspos("RICH",1,"ALIC",0,0,0,0, "ONLY");  //single RICH chamber without rotation test beam geometry
 476   }else
 477     for(int i=1;i<=kNchambers;i++){ //full RICH with 7 chambers
 478       AliMatrix(id,C(i)->ThetaXd(),C(i)->PhiXd(),  C(i)->ThetaYd(),C(i)->PhiYd(),  C(i)->ThetaZd(),C(i)->PhiZd());
 479       gMC->Gspos("RICH",i,"ALIC",C(i)->Center().X(),C(i)->Center().Y(),C(i)->Center().Z(),id, "ONLY");
 480     }
 481 //Pad Panel frame  6 sectors
 482   par[0]=648*mm/2;par[1]=  411*mm/2;par[2]=40  *mm/2;gMC->Gsvolu("RPPF","BOX ",(*fIdtmed)[kAl]  ,par,3);//PPF 2001P2 inner size of the slab by 1mm more
 483   par[0]=181*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("PPFL","BOX ",(*fIdtmed)[kAir] ,par,3);//large whole
 484   par[0]=114*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("PPFS","BOX ",(*fIdtmed)[kAir] ,par,3);//small whole
 485   par[0]=644*mm/2;par[1]=  407*mm/2;par[2]= 1.7*mm/2;gMC->Gsvolu("RPC ","BOX ",(*fIdtmed)[kCsI] ,par,3);//by 0.2 mm more then actual size (PCB 2006P1)
 486
 487   gMC->Gspos("RPPF",1,"RICH",    -335*mm,      -433*mm,  8*cm+20*mm,  0,"ONLY");//F1 2040P1 z p.84 TDR
 488   gMC->Gspos("RPPF",2,"RICH",    +335*mm,      -433*mm,  8*cm+20*mm,  0,"ONLY");
 489   gMC->Gspos("RPPF",3,"RICH",    -335*mm,         0*mm,  8*cm+20*mm,  0,"ONLY");
 490   gMC->Gspos("RPPF",4,"RICH",    +335*mm,         0*mm,  8*cm+20*mm,  0,"ONLY");
 491   gMC->Gspos("RPPF",5,"RICH",    -335*mm,      +433*mm,  8*cm+20*mm,  0,"ONLY");
 492   gMC->Gspos("RPPF",6,"RICH",    +335*mm,      +433*mm,  8*cm+20*mm,  0,"ONLY");
 493   gMC->Gspos("RPC ",1,"RPPF",       0*mm,         0*mm,   -19.15*mm,  0,"ONLY");//PPF 2001P2
 494   gMC->Gspos("PPFL",1,"RPPF",  -224.5*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 495   gMC->Gspos("PPFL",2,"RPPF",  -224.5*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 496   gMC->Gspos("PPFL",3,"RPPF",  -224.5*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 497   gMC->Gspos("PPFL",4,"RPPF",  -224.5*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 498   gMC->Gspos("PPFS",1,"RPPF",  - 65.0*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 499   gMC->Gspos("PPFS",2,"RPPF",  - 65.0*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 500   gMC->Gspos("PPFS",3,"RPPF",  - 65.0*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 501   gMC->Gspos("PPFS",4,"RPPF",  - 65.0*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 502   gMC->Gspos("PPFS",5,"RPPF",  + 65.0*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 503   gMC->Gspos("PPFS",6,"RPPF",  + 65.0*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 504   gMC->Gspos("PPFS",7,"RPPF",  + 65.0*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 505   gMC->Gspos("PPFS",8,"RPPF",  + 65.0*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 506   gMC->Gspos("PPFL",5,"RPPF",  +224.5*mm,  -151.875*mm,     0.85*mm,  0,"ONLY");
 507   gMC->Gspos("PPFL",6,"RPPF",  +224.5*mm,  - 50.625*mm,     0.85*mm,  0,"ONLY");
 508   gMC->Gspos("PPFL",7,"RPPF",  +224.5*mm,  + 50.625*mm,     0.85*mm,  0,"ONLY");
 509   gMC->Gspos("PPFL",8,"RPPF",  +224.5*mm,  +151.875*mm,     0.85*mm,  0,"ONLY");
 510 //Gap - anod wires 6 copies to RICH
 511   par[0]=648*mm/2;par[1]=  411*mm/2 ;par[2]=4.45*mm/2;gMC->Gsvolu("RGAP ","BOX ",(*fIdtmed)[kCH4] ,par,3);//xy as PPF 2001P2 z WP 2099P1
 512   par[0]=  0*mm  ;par[1]=  20*mkm/2 ;par[2]= 648*mm/2;gMC->Gsvolu("RANO","TUBE",(*fIdtmed)[kW]   ,par,3);//WP 2099P1 z = gap x PPF 2001P2
 513   AliMatrix(id,180,0, 90,90, 90,0); //wires along x
 514
 515   gMC->Gspos("RGAP",1,"RICH",    -335*mm,      -433*mm,8*cm-2.225*mm, 0,"ONLY"); //F1 2040P1 z WP 2099P1
 516   gMC->Gspos("RGAP",2,"RICH",    +335*mm,      -433*mm,8*cm-2.225*mm, 0,"ONLY");
 517   gMC->Gspos("RGAP",3,"RICH",    -335*mm,         0*mm,8*cm-2.225*mm, 0,"ONLY");
 518   gMC->Gspos("RGAP",4,"RICH",    +335*mm,         0*mm,8*cm-2.225*mm, 0,"ONLY");
 519   gMC->Gspos("RGAP",5,"RICH",    -335*mm,      +433*mm,8*cm-2.225*mm, 0,"ONLY");
 520   gMC->Gspos("RGAP",6,"RICH",    +335*mm,      +433*mm,8*cm-2.225*mm, 0,"ONLY");
 521   for(int i=1;i<=96;i++)
 522     gMC->Gspos("RANO",i,"RGAP",     0*mm, -411/2*mm+i*4*mm, 0.185*mm, id,"ONLY"); //WP 2099P1
 523 //Radiator 3 modules
 524   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=  24*mm/2;  gMC->Gsvolu("RRAD","BOX ",(*fIdtmed)[kC6F14]     ,par,3); // Rad 2011P1
 525   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=   4*mm/2;  gMC->Gsvolu("RRFR","BOX ",(*fIdtmed)[kRoha]      ,par,3); //front
 526   par[0]=1330*mm/2 ;par[1]= 413*mm/2  ;par[2]=   5*mm/2;  gMC->Gsvolu("RRWI","BOX ",(*fIdtmed)[kSiO2]      ,par,3); //window
 527   par[0]=1330*mm/2 ;par[1]=   5*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RRLO","BOX ",(*fIdtmed)[kRoha]      ,par,3); //long side
 528   par[0]=  10*mm/2 ;par[1]= 403*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RRSH","BOX ",(*fIdtmed)[kRoha]      ,par,3); //short side
 529   par[0]=   0      ;par[1]=  10*mm/2  ;par[2]=  15*mm/2;  gMC->Gsvolu("RRSP","TUBE",(*fIdtmed)[kSiO2]      ,par,3); //spacer
 530
 531   gMC->Gspos("RRAD",1,"RICH",   0*mm,-434*mm,   -12*mm,  0,"ONLY"); //radiator to RICH
 532   gMC->Gspos("RRAD",2,"RICH",   0*mm,   0*mm,   -12*mm,  0,"ONLY");
 533   gMC->Gspos("RRAD",3,"RICH",   0*mm,+434*mm,   -12*mm,  0,"ONLY");
 534     gMC->Gspos("RRFR",1,"RRAD",   0*mm,   0*mm, -10.0*mm,  0,"ONLY"); //front cover
 535     gMC->Gspos("RRWI",1,"RRAD",   0*mm,   0*mm,   9.5*mm,  0,"ONLY"); //quartz window (back cover)
 536     gMC->Gspos("RRLO",1,"RRAD",   0*mm,-204*mm,  -0.5*mm,  0,"ONLY"); //long side
 537     gMC->Gspos("RRLO",2,"RRAD",   0*mm,+204*mm,  -0.5*mm,  0,"ONLY"); //long side
 538     gMC->Gspos("RRSH",1,"RRAD",-660*mm,   0*mm,  -0.5*mm,  0,"ONLY"); //short side
 539     gMC->Gspos("RRSH",2,"RRAD",+660*mm,   0*mm,  -0.5*mm,  0,"ONLY"); //short side
 540     for(int i=0;i<3;i++)
 541       for(int j=0;j<10;j++)
 542         gMC->Gspos("RRSP",10*i+j,"RRAD",-1330*mm/2+116*mm+j*122*mm,(i-1)*105*mm,-0.5*mm,0,"ONLY");
 543
 544 //Sandbox
 545   par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]=50.5*mm/2; gMC->Gsvolu("RSNB","BOX ",(*fIdtmed)[kAir]  ,par,3);  //2072P1
 546   par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]= 0.5*mm/2; gMC->Gsvolu("RSCO","BOX ",(*fIdtmed)[kAl]   ,par,3);  //cover
 547   par[0]=1359*mm/2 ;par[1]=1318*mm/2;par[2]=49.5*mm/2; gMC->Gsvolu("RSHO","BOX ",(*fIdtmed)[kRoha] ,par,3); //honeycomb structure
 548
 549   gMC->Gspos("RSNB",1,"RICH",   0*mm, 0*mm, -73.75*mm, 0,"ONLY"); //p.84 TDR sandbox to rich
 550     gMC->Gspos("RSHO",1,"RSNB", 0*mm, 0*mm,      0*mm, 0,"ONLY"); //2072P1 honeycomv to sandbox
 551     gMC->Gspos("RSCO",1,"RSNB", 0*mm, 0*mm,    +25*mm, 0,"ONLY"); //cover to sandbox
 552     gMC->Gspos("RSCO",2,"RSNB", 0*mm, 0*mm,    -25*mm, 0,"ONLY"); //cover to sandbox
 553
 554   AliDebug(1,"Stop main.");
 555 }//void AliRICH::CreateGeometry()
 556 //__________________________________________________________________________________________________
 557 void AliRICH::ControlPlots()
 558 {
 559 // Creates a set of hists to control the results of simulation. Hists are in file $HOME/RCP.root
 560
 561   TH1F *pHxD=0,*pHyD=0,*pNumClusH1=0,
 562                    *pQdcH1=0,       *pSizeH1=0,
 563                    *pPureMipQdcH1=0,*pPureMipSizeH1=0,
 564                    *pPureCerQdcH1=0,*pPureCerSizeH1=0,
 565                    *pPureFeeQdcH1=0,*pPureFeeSizeH1=0,
 566                    *pMipQdcH1=0,    *pPhotQdcH1=0;
 567   TH2F *pMapH2=0,*pPureMipMapH2=0,*pPureCerMapH2=0,*pPureFeeMapH2=0;
 568
 569   Bool_t isDig =!GetLoader()->LoadDigits();
 570   Bool_t isClus=!GetLoader()->LoadRecPoints();
 571
 572   if(!isDig && !isClus){AliError("No digits and clusters! Nothing to do.");return;}
 573
 574   TStopwatch sw;TDatime time;
 575
 576   TFile *pFile = new TFile("$(HOME)/RCP.root","RECREATE");
 577
 578   if(isDig){
 579     AliInfo("Digits available");
 580     pHxD=new TH1F("HitDigitDiffX","Hit-Digits diff X all chambers;diff [cm]",100,-10,10);
 581     pHyD=new TH1F("HitDigitDiffY","Hit-Digits diff Y all chambers;diff [cm]",100,-10,10);
 582   }//isDig
 583
 584   if(isClus){
 585     cout<<"Clusters available\n";
 586     pNumClusH1=new TH1F("NumClusPerEvent","Number of clusters per event;number",50,0,49);
 587
 588     pQdcH1        =new TH1F("ClusQdc",   "Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 589     pSizeH1       =new TH1F("ClusSize",  "Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 590     pMapH2        =new TH2F("ClusMap",   "Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 591
 592     pMipQdcH1     =new TH1F("QdcMip"      ,"MIP Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 593     pPhotQdcH1    =new TH1F("QdcPhot"     ,"Cer+Fee Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 594
 595     pPureMipQdcH1 =new TH1F("QdcPureMip"  ,"MIP only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 596     pPureMipSizeH1=new TH1F("SizePureMip" ,"MIP only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 597     pPureMipMapH2 =new TH2F("MapPureMip"  ,"MIP only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 598
 599     pPureCerQdcH1 =new TH1F("QdcPureCer"  ,"Cerenkov only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 600     pPureCerSizeH1=new TH1F("SizePureCer" ,"Cernekov only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 601     pPureCerMapH2 =new TH2F("MapPureCer"  ,"Cerenkov only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 602
 603     pPureFeeQdcH1 =new TH1F("QdcPureFee"  ,"Feedback only Cluster Charge all chambers;q [QDC]",R()->P()->MaxQdc(),0,R()->P()->MaxQdc());
 604     pPureFeeSizeH1=new TH1F("SizePureFee" ,"Feedback only Cluster size all chambers;size [number of pads in cluster]",100,0,100);
 605     pPureFeeMapH2 =new TH2F("MapPureFee"  ,"Feedback only Cluster map;x [cm];y [cm]",1000,0,R()->P()->PcSizeX(),1000,0,R()->P()->PcSizeY());
 606   }//isClus
 607
 608   for(Int_t iEvtN=0;iEvtN < GetLoader()->GetRunLoader()->GetAliRun()->GetEventsPerRun();iEvtN++){//events loop
 609     GetLoader()->GetRunLoader()->GetEvent(iEvtN);    //gets current event
 610
 611     if(!GetLoader()->TreeH()) GetLoader()->LoadHits();
 612     for(Int_t iPrimN=0;iPrimN < GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 613        GetLoader()->TreeH()->GetEntry(iPrimN);
 614     }
 615
 616     if(isClus) GetLoader()->TreeR()->GetEntry(0);
 617     if(isDig)  GetLoader()->TreeD()->GetEntry(0);
 618
 619     for(Int_t iChamN=1;iChamN<=7;iChamN++){//chambers loop
 620       if(isClus){
 621         Int_t iNclusCham=Clusters(iChamN)->GetEntries(); if(iNclusCham) pNumClusH1->Fill(iNclusCham);//number of clusters per event
 622         for(Int_t iClusN=0;iClusN<iNclusCham;iClusN++){//clusters loop
 623           AliRICHcluster *pClus=(AliRICHcluster*)Clusters(iChamN)->At(iClusN);
 624                                        pQdcH1        ->Fill(pClus->Q());
 625                                        pSizeH1       ->Fill(pClus->Size());
 626                                        pMapH2        ->Fill(pClus->X(),pClus->Y()); //common
 627
 628            if(pClus->IsSingleMip())     {pPureMipQdcH1 ->Fill(pClus->Q());
 629                                        pPureMipSizeH1->Fill(pClus->Size());
 630                                        pPureMipMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Mips
 631
 632            if(pClus->IsSingleCerenkov()){pPureCerQdcH1 ->Fill(pClus->Q());
 633                                        pPureCerSizeH1->Fill(pClus->Size());
 634                                        pPureCerMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Cerenkovs
 635
 636            if(pClus->IsSingleFeedback()){pPureFeeQdcH1 ->Fill(pClus->Q());
 637                                        pPureFeeSizeH1->Fill(pClus->Size());
 638                                        pPureFeeMapH2 ->Fill(pClus->X(),pClus->Y());}//Pure Feedbacks
 639
 640            if(pClus->IsMip()) {pMipQdcH1 ->Fill(pClus->Q());} //MIP+ other contributions
 641            if(!pClus->IsPureMip())     pPhotQdcH1->Fill(pClus->Q());  //not MIP
 642         }//clusters loop
 643       }//isClus
 644       if(isDig){
 645         for(Int_t iDigN=0;iDigN<R()->Digits(iChamN)->GetEntries();iDigN++){//digits loop
 646           AliRICHdigit *pDig=(AliRICHdigit*)R()->Digits(iChamN)->At(iDigN);
 647           AliRICHhit   *pHit=Hit(pDig->GetTrack(0));//get first hit of this digit
 648           TVector2 hitV2=R()->C(iChamN)->Mrs2Pc(pHit->OutX3()); TVector2 digV2=R()->P()->Pad2Loc(pDig->Pad());//center of pad for digit
 649           pHxD->Fill(hitV2.X()-digV2.X()); pHyD->Fill(hitV2.Y()-digV2.Y());
 650         }//digits loop
 651       }//isDig
 652     }//chambers loop
 653     Info("ControlPlots","Event %i processed.",iEvtN);
 654   }//events loop
 655
 656   if(isDig)  GetLoader()->UnloadDigits();
 657   if(isClus) GetLoader()->UnloadRecPoints();
 658
 659   pFile->Write(); delete pFile;
 660   sw.Print();time.Print();
 661 }//ControlPlots()
 662 //__________________________________________________________________________________________________
 663 AliRICHhit* AliRICH::Hit(Int_t tid)
 664 {
 665 //defines which hit provided by given tid for the currently loaded event
 666   R()->GetLoader()->LoadHits();
 667   for(Int_t iPrimN=0;iPrimN<R()->GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 668     R()->GetLoader()->TreeH()->GetEntry(iPrimN);
 669     for(Int_t iHitN=0;iHitN<R()->Hits()->GetEntries();iHitN++){
 670       AliRICHhit *pHit=(AliRICHhit*)R()->Hits()->At(iHitN);
 671       if(tid==pHit->Track()) {R()->GetLoader()->UnloadHits();return pHit;}
 672     }//hits
 673   }//prims loop
 674   R()->GetLoader()->UnloadHits();
 675   return 0;
 676 }
 677 //__________________________________________________________________________________________________
 678 void AliRICH::PrintHits(Int_t iEvtN)
 679 {
 680 //Prints a list of RICH hits for a given event. Default is event number 0.
 681   AliInfo(Form("List of RICH hits for event %i",iEvtN));
 682   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 683   if(R()->GetLoader()->LoadHits()) return;
 684
 685   Int_t iTotalHits=0;
 686   for(Int_t iPrimN=0;iPrimN<R()->GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
 687     R()->GetLoader()->TreeH()->GetEntry(iPrimN);
 688     R()->Hits()->Print();
 689     iTotalHits+=R()->Hits()->GetEntries();
 690   }
 691   R()->GetLoader()->UnloadHits();
 692   AliInfo(Form("totally %i hits",iTotalHits));
 693 }
 694 //__________________________________________________________________________________________________
 695 void AliRICH::PrintSDigits(Int_t iEvtN)
 696 {
 697 //prints a list of RICH sdigits  for a given event
 698   Info("PrintSDigits","List of RICH sdigits for event %i",iEvtN);
 699   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 700   if(R()->GetLoader()->LoadSDigits()) return;
 701
 702   R()->GetLoader()->TreeS()->GetEntry(0);
 703   R()->SDigits()->Print();
 704   R()->GetLoader()->UnloadSDigits();
 705   Info("PrintSDigits","totally %i sdigits",R()->SDigits()->GetEntries());
 706 }
 707 //__________________________________________________________________________________________________
 708 void AliRICH::PrintDigits(Int_t iEvtN)
 709 {
 710 //prints a list of RICH digits  for a given event
 711   Info("PrintDigits","List of RICH digits for event %i",iEvtN);
 712   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 713   if(R()->GetLoader()->LoadDigits()) return;
 714
 715   Int_t iTotalDigits=0;
 716   R()->GetLoader()->TreeD()->GetEntry(0);
 717   for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){
 718     R()->Digits(iChamber)->Print();
 719     iTotalDigits+=R()->Digits(iChamber)->GetEntries();
 720   }
 721   R()->GetLoader()->UnloadDigits();
 722   Info("PrintDigits","totally %i Digits",iTotalDigits);
 723 }
 724 //__________________________________________________________________________________________________
 725 void AliRICH::PrintClusters(Int_t iEvtN)
 726 {
 727 //prints a list of RICH clusters  for a given event
 728   Info("PrintClusters","List of RICH clusters for event %i",iEvtN);
 729   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 730   if(R()->GetLoader()->LoadRecPoints()) return;
 731
 732   Int_t iTotalClusters=0;
 733   R()->GetLoader()->TreeR()->GetEntry(0);
 734   for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){
 735     R()->Clusters(iChamber)->Print();
 736     iTotalClusters+=R()->Clusters(iChamber)->GetEntries();
 737   }
 738   R()->GetLoader()->UnloadRecPoints();
 739   Info("PrintClusters","totally %i clusters",iTotalClusters);
 740 }
 741 //__________________________________________________________________________________________________
 742 void AliRICH::PrintTracks(Int_t iEvtN)
 743 {
 744 //prints a list of tracks (including secondaru) for a given event
 745   Info("PrintTracks","List of all tracks for event %i",iEvtN);
 746   R()->GetLoader()->GetRunLoader()->GetEvent(iEvtN);
 747   if(R()->GetLoader()->GetRunLoader()->LoadHeader()) return;
 748   if(R()->GetLoader()->GetRunLoader()->LoadKinematics()) return;
 749   Int_t iTracksCounter=0;
 750   Info("PrintTracks","totally %i tracks",iTracksCounter);
 751 }