RICH/AliRICHParam.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 #include "AliRICHParam.h" //class header
  16 #include "AliESD.h"
  17 #include <TCanvas.h>      //TestXXX()
  18 #include <TLatex.h>
  19 #include <THStack.h>
  20 #include <TLegend.h>
  21 #include <TView.h>
  22 #include <TPolyMarker3D.h>
  23 #include <TPolyLine3D.h>
  24 #include <TPolyLine.h>
  25 #include <TSystem.h>
  26 #include <TVector2.h>
  27 #include <TVector3.h>
  28 #include <TRotation.h>
  29 #include <AliCDBManager.h> //CdbRead()
  30 #include <AliCDBStorage.h> //CdbRead()
  31 #include <AliCDBEntry.h>   //CdbRead()
  32 #include <AliRunLoader.h>  //Stack()
  33 #include <AliStack.h>      //Stack()
  34 #include <TParticle.h>     //Stack()
  35 #include "AliRICHHelix.h"  //TestTrans()
  36 #include <TLine.h>
  37
  38
  39
  40 ClassImp(AliRICHParam)
  41 AliRICHParam * AliRICHParam::fgInstance             =0x0;     //singleton pointer
  42 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  43 AliRICHParam::AliRICHParam():TNamed("RichParam","default version")
  44 {
  45 // Here all the intitializition is taken place when AliRICHParam::Instance() is invoked for the first time.
  46 // In particulare, matrices to be used for LORS<->MARS trasnformations are initialized from TGeo structure.
  47 // Note that TGeoManager should be already initialized from geometry.root file
  48   for(Int_t iCh=0;iCh<kNchambers;iCh++) fMatrix[iCh]=(TGeoHMatrix*)gGeoManager->GetVolume("ALIC")->GetNode(Form("RICH_%i",iCh+1))->GetMatrix();
  49   CdbRead(0,0);
  50   fgInstance=this;
  51 }//ctor
  52 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  53 Float_t AliRICHParam::AbsCH4(Float_t eV)
  54 {
  55 // Evaluate the absorbtion lenght of CH4 for a photon of energy eV in electron-volts
  56   const Float_t kLoschmidt=2.686763e19;                                      // LOSCHMIDT NUMBER IN CM-3
  57   const Float_t kPressure=750.0;          //mm of Hg
  58   const Float_t kTemperature=283.0;       //K (10 grad C)
  59   const Float_t kPn=kPressure/760.;
  60   const Float_t kTn=kTemperature/273.16;
  61   const Float_t kC0=-1.655279e-1;
  62   const Float_t kC1= 6.307392e-2;
  63   const Float_t kC2=-8.011441e-3;
  64   const Float_t kC3= 3.392126e-4;
  65
  66   Float_t crossSection=0;
  67   if (eV<7.75)
  68     crossSection=0.06e-22;
  69   else                 //------ METHANE CROSS SECTION cm-2 ASTROPH. J. 214, L47 (1978)
  70     crossSection=(kC0+kC1*eV+kC2*eV*eV+kC3*eV*eV*eV)*1.e-18;
  71
  72     Float_t density=kLoschmidt*kPn/kTn; //CH4 molecular concentration (cm^-3)
  73     return 1.0/(density*crossSection);
  74 }//AbsoCH4()
  75 //__________________________________________________________________________________________________sss
  76 void AliRICHParam::CdbRead(Int_t run,Int_t version)
  77 {
  78 // This methode read all the calibration information and initialise corresponding fields for requested run number
  79 // Arguments: run - run number for which to retrieve calibration
  80 //            version- version number
  81 //   Returns: none
  82
  83   AliCDBEntry *pEntry=AliCDBManager::Instance()->Get("RICH/RICHConfig/RefIdxC6F14",run,0,version); //try to get from common local storage
  84   if(pEntry){
  85     fIdxC6F14=(TF2*)pEntry->GetObject();
  86     if(!(AliCDBManager::Instance()->GetCacheFlag())) delete pEntry;
  87   }else{
  88     AliWarning("No valid calibarion, the hardcoded will be used!");
  89     fIdxC6F14=new TF2("RidxC4F14","sqrt(1+0.554*(1239.84e-9/x)^2/((1239.84e-9/x)^2-5796)-0.0005*(y-20))",5.5e-9,8.5e-9,0,50); //DiMauro mail
  90     fIdxC6F14->SetUniqueID(20);//T=20 deg C
  91   }
  92 }//CdbRead()
  93 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  94 void AliRICHParam::Print(Option_t* opt) const
  95 {
  96 // print some usefull (hopefully) info on some internal guts of RICH parametrisation
  97   Printf("Pads in chamber (%3i,%3i) in sector (%2i,%2i) pad size (%4.2f,%4.2f)",NpadsX(),NpadsY(),NpadsXsec(),NpadsYsec(),PadSizeX(),PadSizeY());
  98
  99   for(Int_t i=0;i<kNchambers;i++) fMatrix[i]->Print(opt);
 100 }//Print()
 101 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 102 void AliRICHParam::TestSeg()
 103 {
 104 // Provides a set of pictures to test segementation currently in use.
 105 // Arguments: none
 106 //   Returns: none
 107   new TCanvas("pads","View from electronics side, IP is behind the picture.");
 108   gPad->Range(-5,-5,PcSizeX()+5,PcSizeY()+5);
 109 // list of corners:
 110   DrawSectors(kTRUE);
 111   TLatex t;
 112   t.SetTextSize(0.02);
 113   t.SetTextColor(kRed)    ;t.SetTextAlign(11); t.DrawLatex(0         ,PcSizeY(),Form("Pad size %.2fx%.2fcm dead zone %.2fcm",PadSizeX(),PadSizeY(),DeadZone()));
 114   t.SetTextColor(kBlue)   ;t.SetTextAlign(21); t.DrawLatex(SecSizeX(),PcSizeY(),Form("Pc  size %.2fx%.2fcm %ix%i pads"      ,PcSizeX() ,PcSizeY() ,NpadsX()    ,NpadsY()));
 115   t.SetTextColor(kMagenta);t.SetTextAlign(31); t.DrawLatex(PcSizeX() ,PcSizeY(),Form("Sec size %.2fx%.2fcm %ix%i pads"      ,SecSizeX(),SecSizeY(),NpadsXsec() ,NpadsYsec()));
 116
 117
 118 //  TVector p(2);   TVector2 c;    TVector2 b;   //current: pad, pad center, pad boundary
 119 //  Double_t x0=0,x1=SecSizeX(),x2=SecSizeX()+DeadZone()                                                      ,x3=PcSizeX();
 120 //  Double_t y0=0,y1=SecSizeY(),y2=SecSizeY()+DeadZone(),y3=2*SecSizeY()+DeadZone(),y4=PcSizeY()-SecSizeY(),y5=PcSizeY();
 121   t.SetTextSize(0.015); t.SetTextColor(kBlue);
 122
 123 //   b.Set(x0,y0);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 124 //   b.Set(x0,y1);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 125 //   b.Set(x0,y2);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 126 //   b.Set(x0,y3);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 127 //   b.Set(x0,y4);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 128 //   b.Set(x0,y5);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 129 //
 130 //   b.Set(x1,y0);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 131 //   b.Set(x1,y1);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 132 //   b.Set(x1,y2);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 133 //   b.Set(x1,y3);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 134 //   b.Set(x1,y4);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 135 //   b.Set(x1,y5);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 136 //
 137 //   b.Set(x2,y0);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 138 //   b.Set(x2,y1);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 139 //   b.Set(x2,y2);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 140 //   b.Set(x2,y3);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 141 //   b.Set(x2,y4);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(11);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 142 //   b.Set(x2,y5);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(13);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 143 //
 144 //   b.Set(x3,y0);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 145 //   b.Set(x3,y1);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 146 //   b.Set(x3,y2);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 147 //   b.Set(x3,y3);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 148 //   b.Set(x3,y4);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(31);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 149 //   b.Set(x3,y5);p=Loc2Pad(b);c=Pad2Loc(p);t.SetTextAlign(33);t.DrawText(c.X(),c.Y(),Form("(%.2f,%.2f)-(%.0f,%.0f)-(%.2f,%.2f)",b.X(),b.Y(),p(0),p(1),c.X(),c.Y()));
 150
 151 //Now all chambers view
 152   TCanvas *pC=new TCanvas("cc","Chambers view from electronics side - IP is behind the picture"); pC->Divide(3,3);
 153   t.SetTextSize(0.05);
 154   for(Int_t i=1;i<=7;i++){
 155     if(i==1) pC->cd(9); if(i==2) pC->cd(8); if(i==3) pC->cd(6); if(i==4) pC->cd(5); if(i==5) pC->cd(4); if(i==6) pC->cd(2); if(i==7) pC->cd(1);
 156     gPad->Range(-5,-5,PcSizeX()+5,PcSizeY()+10);
 157     DrawSectors(kTRUE);
 158     t.SetTextColor(kBlack);   t.SetTextAlign(21); t.DrawText(SecSizeX(),PcSizeY(),Form("Cham %i",i));
 159     t.SetTextColor(41);       t.SetTextAlign(11); t.DrawText(0         ,PcSizeY(),Form("DDL ID %i",1536+2*i-2)); //left half of chamber
 160     t.SetTextColor(29);       t.SetTextAlign(31); t.DrawText(PcSizeX() ,PcSizeY(),Form("DDL ID %i",1536+2*i-1)); //right half of chamber
 161   }
 162 }//TestSeg()
 163 //__________________________________________________________________________________________________
 164 void AliRICHParam::TestResp()
 165 {
 166 // Provides a set of plot to check the response parametrisation currently in use.
 167 // Arguments: none
 168 //   Returns: none
 169   TCanvas *pC=new TCanvas("c","Amplification test",900,800);
 170   pC->Divide(1,2);
 171
 172
 173   const Int_t kNpoints=8;
 174   THStack *pStackPhot=new THStack("StackPhot","photons");
 175   THStack *pStackMip =new THStack("StackMip","mips");
 176   TLegend *pLeg=new TLegend(0.6,0.2,0.9,0.5,"legend");
 177   TH1F *apHphot[kNpoints];
 178   TH1F *apHmip[kNpoints];
 179
 180   Double_t starty=0;
 181   Double_t deltay=AliRICHParam::SecSizeY()/kNpoints;
 182
 183   for(int i=0;i<kNpoints;i++){
 184     apHphot[i]=new TH1F(Form("hphot%i",i),"Qdc for Photon;QDC;Counts",500,0,500); apHphot[i]->SetLineColor(i);pStackPhot->Add(apHphot[i]);
 185     apHmip[i] =new TH1F(Form("hmip%i",i),"Qdc for Mip;QDC;Counts",4000,0,4000);   apHmip[i]->SetLineColor(i);pStackMip->Add(apHmip[i]);
 186
 187     pLeg->AddEntry(apHphot[i],Form("@(10,%5.2f->%5.2f)",starty+i*deltay,starty+i*deltay-SecSizeY()/2));
 188   }
 189
 190
 191   TVector2 x2(0,0);
 192   for(Int_t i=0;i<10000;i++){//events loop
 193     for(int j=0;j<kNpoints;j++){
 194       x2.Set(10,starty+j*deltay);
 195       apHphot[j]->Fill(TotQdc(x2,0));
 196       apHmip[j]->Fill(TotQdc(x2,gRandom->Landau(600,150)*1e-9));
 197     }
 198   }
 199
 200   pC->cd(1);  pStackMip->Draw("nostack");
 201   pC->cd(2);  pStackPhot->Draw("nostack"); pLeg->Draw();
 202 }//TestResp()
 203 //__________________________________________________________________________________________________
 204 void AliRICHParam::TestTrans()
 205 {
 206 // Tests transformation methods
 207 // Arguments: none
 208 //   Returns: none
 209
 210   AliRICHParam *pParam=AliRICHParam::Instance();
 211   Int_t iNpointsX=50,iNpointsY=50;
 212   new TCanvas("trasform","Test LORS-MARS transform"); TLatex t; t.SetTextSize(0.02);
 213
 214   TView *pView=new TView(1);  pView->SetRange(-400,-400,-400,400,400,400);
 215   DrawAxis();
 216   for(Int_t iCham=1;iCham<=7;iCham++){//chamber loop
 217     AliRICHHelix helix(2.5,Norm(iCham).Theta()*TMath::RadToDeg(),Norm(iCham).Phi()*TMath::RadToDeg());
 218     helix.RichIntersect(AliRICHParam::Instance());
 219     TPolyMarker3D *pChamber=new TPolyMarker3D(iNpointsX*iNpointsY);
 220     Int_t i=0;
 221     for(Double_t x=0;x<PcSizeX();x+=PcSizeX()/iNpointsX)
 222       for(Double_t y=0;y<PcSizeY();y+=PcSizeY()/iNpointsY){//step loop
 223         TVector3 v3=pParam->Lors2Mars(iCham,x,y,kPc); TVector2 v2=pParam->Mars2Lors(iCham,v3,kPc);//LORS->MARS->LORS
 224         Double_t dx=v2.X()-x , dy=v2.Y()-y;
 225         if(dx>0.000001 || dy>0.000001) Printf("Problem in MARS<->LORS transformations dx=%f dy=%f!!!",dx,dy);
 226         pChamber->SetPoint(i++,v3.X(),v3.Y(),v3.Z());//Pc plane point in MARS
 227       }//step loop
 228     pChamber->SetMarkerSize(1);
 229     pChamber->SetMarkerColor(iCham);
 230     pChamber->Draw();
 231     helix.Draw();
 232     t.SetNDC();t.SetTextColor(iCham); t.DrawText(0.1,iCham*0.1,Form("Chamber %i",iCham));
 233   }//chambers loop
 234 }//TestTrans()
 235 //__________________________________________________________________________________________________
 236 void AliRICHParam::DrawAxis()
 237 {
 238 // This utility methode draws axis on geometry scene
 239 // Arguments: none
 240 //   Returns: none
 241   Double_t x[6]={0,0,0,300,0,0};  Double_t y[6]={0,0,0,0,300,0};  Double_t z[6]={0,0,0,0,0,300};
 242   TPolyLine3D *pXaxis=new TPolyLine3D(2,x);pXaxis->SetLineColor(kRed);   pXaxis->Draw();
 243   TPolyLine3D *pYaxis=new TPolyLine3D(2,y);pYaxis->SetLineColor(kGreen); pYaxis->Draw();
 244   TPolyLine3D *pZaxis=new TPolyLine3D(2,z);pZaxis->SetLineColor(kBlue);  pZaxis->Draw();
 245 }
 246 //__________________________________________________________________________________________________
 247 void AliRICHParam::DrawSectors(Bool_t isInfo)
 248 {
 249 // Utility methode draws RICH chamber sectors on event display.
 250 // Arguments: none
 251 //   Returns: none
 252   Double_t xLeft[5]  = {0,0,SecSizeX(),SecSizeX(),0};
 253   Double_t xRight[5] = {SecSizeX()+DeadZone(),SecSizeX()+DeadZone(),PcSizeX(),PcSizeX(),SecSizeX()+DeadZone()};
 254
 255   Double_t yDown[5]   = {0,SecSizeY(),SecSizeY(),0,0};
 256   Double_t yCenter[5] = {  SecSizeY()+DeadZone(),2*SecSizeY()+DeadZone(),2*SecSizeY()+DeadZone(),
 257                            SecSizeY()+DeadZone(),SecSizeY()+DeadZone()};
 258   Double_t yUp[5]     = {2*SecSizeY()+2*DeadZone(),PcSizeY(),PcSizeY(),2*SecSizeY()+2*DeadZone(),2*SecSizeY()+2*DeadZone()};
 259
 260   Int_t iColorLeft=29,iColorRight=41;
 261   TPolyLine *sec[6];
 262
 263   sec[0]= new TPolyLine(5,xLeft ,yDown);
 264   sec[1]= new TPolyLine(5,xRight,yDown);
 265   sec[2]= new TPolyLine(5,xLeft ,yCenter);
 266   sec[3]= new TPolyLine(5,xRight,yCenter);
 267   sec[4]= new TPolyLine(5,xLeft, yUp);
 268   sec[5]= new TPolyLine(5,xRight,yUp);
 269
 270   for(Int_t iSec=0;iSec<6;iSec++){
 271     if(isInfo){
 272       (iSec%2)? sec[iSec]->SetFillColor(iColorLeft): sec[iSec]->SetFillColor(iColorRight);
 273       sec[iSec]->Draw("f");
 274     }else
 275       sec[iSec]->Draw();
 276   }
 277
 278   if(!isInfo) return;
 279
 280   TText t; t.SetTextSize(0.02);
 281   t.DrawText(32,20,"Sec 1");
 282   t.DrawText(98,20,"Sec 2");
 283   t.DrawText(32,65,"Sec 3");
 284   t.DrawText(98,65,"Sec 4");
 285   t.DrawText(32,106,"Sec 5");
 286   t.DrawText(98,106,"Sec 6");
 287
 288   Double_t x246=SecSizeX()+DeadZone();
 289   Double_t y34=SecSizeY()+DeadZone();
 290   Double_t y56=2*y34;
 291
 292   for(Int_t iRow=1;iRow<=8;iRow++){//dilogic chip serves 8x6 pads
 293     Double_t y=(iRow-1)*6*PadSizeY();
 294     TLine *pL1=new TLine(0   ,y    ,SecSizeX(),y    ); pL1->Draw(); t.SetTextAlign(31); t.DrawText(0        ,y    ,Form("r%i",iRow)   );//sec1
 295     TLine *pL2=new TLine(x246,y    ,PcSizeX() ,y    ); pL2->Draw(); t.SetTextAlign(11); t.DrawText(PcSizeX(),y    ,Form("r%i",25-iRow));//sec2
 296
 297     TLine *pL3=new TLine(0   ,y+y34,SecSizeX(),y+y34); pL3->Draw(); t.SetTextAlign(31); t.DrawText(0        ,y+y34,Form("r%i",iRow+8) );//sec3
 298     TLine *pL4=new TLine(x246,y+y34,PcSizeX() ,y+y34); pL4->Draw(); t.SetTextAlign(11); t.DrawText(PcSizeX(),y+y34,Form("r%i",17-iRow));//sec4
 299
 300     TLine *pL5=new TLine(0   ,y+y56,SecSizeX(),y+y56); pL5->Draw(); t.SetTextAlign(31); t.DrawText(0        ,y+y56,Form("r%i",iRow+16));//sec5
 301     TLine *pL6=new TLine(x246,y+y56,PcSizeX() ,y+y56); pL6->Draw(); t.SetTextAlign(11); t.DrawText(PcSizeX(),y+y56,Form("r%i",9-iRow) );//sec4
 302   }
 303
 304   for(Int_t iDilogic=1;iDilogic<=10;iDilogic++){
 305     Double_t x=(iDilogic-1)*8*PadSizeX();
 306     TLine *pL1=new TLine(x     ,0,x     ,SecSizeY()); pL1->Draw(); t.DrawText(x     ,0,Form("d%i",11-iDilogic));
 307     TLine *pL2=new TLine(x+x246,0,x+x246,SecSizeY()); pL2->Draw(); t.DrawText(x+x246,0,Form("d%i",11-iDilogic));
 308
 309     TLine *pL3=new TLine(x     ,y34,x     ,y34+SecSizeY()); pL3->Draw(); t.DrawText(x     ,y34,Form("d%i",11-iDilogic));
 310     TLine *pL4=new TLine(x+x246,y34,x+x246,y34+SecSizeY()); pL4->Draw(); t.DrawText(x+x246,y34,Form("d%i",11-iDilogic));
 311
 312     TLine *pL5=new TLine(x     ,y56,x     ,y56+SecSizeY()); pL5->Draw(); t.DrawText(x     ,y56,Form("d%i",11-iDilogic));
 313     TLine *pL6=new TLine(x+x246,y56,x+x246,y56+SecSizeY()); pL6->Draw(); t.DrawText(x+x246,y56,Form("d%i",11-iDilogic));
 314   }
 315
 316   t.SetTextAlign(13); t.DrawText(0         ,0,"pad1");  t.DrawText(x246     ,0,"pad81");
 317   t.SetTextAlign(33); t.DrawText(SecSizeX(),0,"pad80"); t.DrawText(PcSizeX(),0,"pad160");
 318 }//DrawSectors()
 319 //__________________________________________________________________________________________________
 320 TVector3 AliRICHParam::ForwardTracing(TVector3 entranceTrackPoint, TVector3 vectorTrack, Double_t thetaC, Double_t phiC)
 321 {
 322 // Trace a single Ckov photon from a given emission point up to photocathode taking into account ref indexes of materials it travereses
 323   TVector3 vBad(-999,-999,-999);
 324   TVector3 nPlane(0,0,1);
 325   Double_t planeZposition = 0.5*RadThick();
 326   TVector3 planePoint(0,0,0.5*RadThick()); //this is plane parallel to window which contains emission point
 327   TVector3 emissionPoint = PlaneIntersect(vectorTrack,entranceTrackPoint,nPlane,planePoint);
 328   Double_t thetaout,phiout;
 329   AnglesInDRS(vectorTrack.Theta(),vectorTrack.Phi(),thetaC,phiC,thetaout,phiout);
 330   TVector3 vectorPhotonInC6F14;
 331   vectorPhotonInC6F14.SetMagThetaPhi(1,thetaout,phiout);
 332   planeZposition=RadThick();
 333   planePoint.SetXYZ(0,0,planeZposition);
 334   TVector3 entranceToSiO2Point = PlaneIntersect(vectorPhotonInC6F14,emissionPoint,nPlane,planePoint);
 335
 336   Double_t photonEn = EckovMean();
 337   Double_t angleInSiO2 = SnellAngle(IdxC6F14(EckovMean()),IdxSiO2(EckovMean()),vectorPhotonInC6F14.Theta());if(angleInSiO2<0) return vBad;
 338   TVector3 vectorPhotonInSiO2;
 339   vectorPhotonInSiO2.SetMagThetaPhi(1,angleInSiO2,phiout);
 340 //  planeZposition+=AliRICHParam::SiO2Thickness();
 341   planeZposition+=WinThick();
 342   planePoint.SetXYZ(0,0,planeZposition);
 343   TVector3 entranceToCH4 = PlaneIntersect(vectorPhotonInSiO2,entranceToSiO2Point,nPlane,planePoint);
 344 //  entranceToCH4.Dump();
 345
 346   //  Double_t angleInCH4 = SnellAngle(AliRICHParam::IndOfRefSiO2(6.755),AliRICHParam::IndOfRefCH4,angleInSiO2);
 347   Double_t angleInCH4 = SnellAngle(IdxSiO2(photonEn),IdxCH4(photonEn),vectorPhotonInSiO2.Theta());if(angleInCH4<0) return vBad;
 348   TVector3 vectorPhotonInCH4;
 349   vectorPhotonInCH4.SetMagThetaPhi(1,angleInCH4,phiout);
 350 //  planeZposition+=AliRICHParam::GapProx();
 351   planeZposition+=Pc2Win();
 352   planePoint.SetXYZ(0,0,planeZposition);
 353   TVector3 impactToPC = PlaneIntersect(vectorPhotonInCH4,entranceToCH4,nPlane,planePoint);
 354 //  impactToPC.Dump();
 355   return impactToPC;
 356 }//FowardTracing
 357 //__________________________________________________________________________________________________
 358 TVector3 AliRICHParam::PlaneIntersect(const TVector3 &lineDir,const TVector3 &linePoint,const TVector3 &planeNorm,const TVector3 &planePoint)
 359 {
 360 // Finds an intersection point between a line and plane.
 361 // Arguments:  lineDir,linePoint    - vector along the line and any point of the line
 362 //             planeNorm,planePoint - vector normal to the plane and any point of the plane
 363 //   Returns:  point of intersection if any
 364   if(planeNorm*lineDir==0) return   TVector3(-999,-999,-999);
 365   TVector3 diff=planePoint-linePoint;
 366   Double_t sint=(planeNorm*diff)/(planeNorm*lineDir);
 367   return linePoint+sint*lineDir;
 368 }//PlaneIntersect
 369 //__________________________________________________________________________________________________
 370 Double_t AliRICHParam::SnellAngle(Float_t n1, Float_t n2, Float_t theta1)
 371 {
 372 // Compute the angle of refraction out of Snell law
 373 // Arguments: n1 - ref idx of first substance
 374 //            n2 - ref idx of second substance
 375 //            n1 - photon impact angle in the first substance i.e. angle between the photon direction and vector normal to the surface (radians)
 376 //   Returns: photon refraction angle, i.e. angle in the second substance (radians)
 377   Double_t sinref=(n1/n2)*TMath::Sin(theta1);
 378   if(sinref>1.)    return -999;
 379   else             return TMath::ASin(sinref);
 380 }//SnellAngle
 381 //__________________________________________________________________________________________________
 382 void AliRICHParam::AnglesInDRS(Double_t trackTheta,Double_t trackPhi,Double_t thetaCerenkov,Double_t phiCerenkov,Double_t &tout,Double_t &pout)
 383 {
 384 // Setup the rotation matrix of the track...
 385
 386   TRotation mtheta;
 387   TRotation mphi;
 388   TRotation minv;
 389   TRotation mrot;
 390
 391   mtheta.RotateY(trackTheta);
 392   mphi.RotateZ(trackPhi);
 393
 394   mrot = mphi * mtheta;
 395     //  minv = mrot.Inverse();
 396
 397   TVector3 photonInRadiator(1,1,1);
 398
 399   photonInRadiator.SetTheta(thetaCerenkov);
 400   photonInRadiator.SetPhi(phiCerenkov);
 401   photonInRadiator = mrot * photonInRadiator;
 402   tout=photonInRadiator.Theta();
 403   pout=photonInRadiator.Phi();
 404 }//AnglesInDRS
 405 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 406 void AliRICHParam::TestHit2SDigs(Double_t x,Double_t y,Double_t e,Bool_t isNew)
 407 {
 408 //Test  hit->sdigits procedures
 409 //Arguments: isNew - if true use new (abs pad) procedure else use old one (TVector)
 410 //  Returns: none
 411   TClonesArray *pSDigLst=new TClonesArray("AliRICHDigit");
 412   Int_t iQtot=-1;
 413   if(isNew){
 414     iQtot=Hit2SDigs(10101,e,pSDigLst);        //new technique
 415   }else{
 416     iQtot=Hit2SDigs(TVector2(x,y),e,pSDigLst);//old technique
 417   }
 418   pSDigLst->Print();
 419   Double_t dQsum=0;
 420   for(Int_t i=0;i<pSDigLst->GetEntriesFast();i++)
 421     dQsum+=((AliRICHDigit*)pSDigLst->At(i))->Qdc();
 422   Printf("Qtot=%i Qsum=%.2f ",iQtot,dQsum);
 423 }
 424 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 425 Int_t AliRICHParam::Stack(Int_t evt,Int_t tid)
 426 {
 427 // Prints some usefull info from stack
 428 // Arguments: evt - event number. if not -1 print info only for that event
 429 //            tid - track id. if not -1 then print it and all it's mothers if any
 430 //   Returns: mother tid of the given tid if any
 431   AliRunLoader *pAL=AliRunLoader::Open();
 432   if(pAL->LoadHeader()) return -1;
 433   if(pAL->LoadKinematics()) return -1;
 434
 435   Int_t mtid=-1;
 436   Int_t iNevt=pAL->GetNumberOfEvents();     Printf("This session contains %i event(s)",iNevt);
 437
 438   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
 439     if(evt!=-1 && evt!=iEvt) continue; //in case one needs to print the requested event, ignore all others
 440     pAL->GetEvent(iEvt);
 441     AliStack *pStack=pAL->Stack();
 442     if(tid==-1){                        //print all tids for this event
 443       for(Int_t i=0;i<pStack->GetNtrack();i++) pStack->Particle(i)->Print();
 444       Printf("totally %i tracks including %i primaries for event %i out of %i event(s)",pStack->GetNtrack(),pStack->GetNprimary(),iEvt,iNevt);
 445     }else{                              //print only this tid and it;s mothers
 446       if(tid<0 || tid>pStack->GetNtrack()) {Printf("Wrong tid, valid tid range for event %i is 0-%i",iEvt,pStack->GetNtrack());break;}
 447       TParticle *pTrack=pStack->Particle(tid); mtid=pTrack->GetFirstMother();
 448       TString str=pTrack->GetName();
 449       while((tid=pTrack->GetFirstMother()) >= 0){
 450         pTrack=pStack->Particle(tid);
 451         str+=" from ";str+=pTrack->GetName();
 452       }
 453       Printf("%s",str.Data());
 454     }//if(tid==-1)
 455   }//events loop
 456   pAL->UnloadHeader();  pAL->UnloadKinematics();
 457   return mtid;
 458 }
 459 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 460 Int_t AliRICHParam::StackCount(Int_t pid,Int_t evt)
 461 {
 462 // Counts total number of particles of given sort (including secondary) for a given event
 463   AliRunLoader *pAL=AliRunLoader::Open();
 464   pAL->GetEvent(evt);
 465   if(pAL->LoadHeader()) return 0;
 466   if(pAL->LoadKinematics()) return 0;
 467   AliStack *pStack=pAL->Stack();
 468
 469   Int_t iCnt=0;
 470   for(Int_t i=0;i<pStack->GetNtrack();i++) if(pStack->Particle(i)->GetPdgCode()==pid) iCnt++;
 471
 472   pAL->UnloadHeader();  pAL->UnloadKinematics();
 473   return iCnt;
 474 }
 475 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++