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