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"
  16 #include "AliRICHChamber.h"
  17 #include "AliRICHDisplFast.h"
  18 #include <TCanvas.h>
  19 #include <TLatex.h>
  20 #include <THStack.h>
  21 #include <TLegend.h>
  22 #include <TView.h>
  23 #include <TPolyMarker3D.h>
  24 #include <TPolyLine3D.h>
  25
  26 ClassImp(AliRICHParam)
  27 Bool_t   AliRICHParam::fgIsWireSag            =kTRUE;   //take ware sagita into account?
  28 Bool_t   AliRICHParam::fgIsResolveClusters    =kTRUE;   //do cluster resolving?
  29 Bool_t   AliRICHParam::fgIsRadioSrc           =kFALSE;  //put radioactive source instead of radiators?
  30 Bool_t   AliRICHParam::fgIsAerogel            =kFALSE;  //special aerogel configuration
  31 Bool_t   AliRICHParam::fgIsTestBeam           =kFALSE;  //special test beam configuration
  32
  33 Int_t    AliRICHParam::fgHV[kNsectors]        ={2050,2050,2050,2050,2050,2050};
  34 Int_t    AliRICHParam::fgNsigmaTh             =4;
  35 Float_t  AliRICHParam::fgSigmaThMean          =1.132; //QDC
  36 Float_t  AliRICHParam::fgSigmaThSpread        =0.035; //
  37
  38 //__________________________________________________________________________________________________
  39 void AliRICHParam::Print(Option_t*)
  40 {
  41   AliInfo(Form("Pads in chamber (%3i,%3i) in sector (%2i,%2i)",NpadsX(),NpadsY(),NpadsXsec(),NpadsYsec()));
  42   AliInfo(Form("Resolve clusters %i sagita %i Radio source %i Aerogel %i TestBeam %i",
  43                 IsResolveClusters(),IsWireSag(),IsRadioSrc(),IsAerogel(),IsTestBeam()));
  44   fpChambers->Print();
  45 }//Print()
  46 //__________________________________________________________________________________________________
  47 void AliRICHParam::CreateChambers()
  48 {
  49 //Create all RICH Chambers on each call. Previous chambers deleted.
  50   if(fpChambers) delete fpChambers;
  51   if(fgIsTestBeam){
  52     fpChambers=new TObjArray(1);//test beam configuration 1 chamber
  53     fpChambers->AddAt(new AliRICHChamber(0),0);
  54   }else{
  55     fpChambers=new TObjArray(kNchambers);//normal configuration 7 chambers
  56     for(int iChamberN=0;iChamberN<kNchambers;iChamberN++)  fpChambers->AddAt(new AliRICHChamber(iChamberN+1),iChamberN);
  57   }
  58   fpChambers->SetOwner();
  59 }//CreateChambers()
  60 //__________________________________________________________________________________________________
  61 Float_t AliRICHParam::AbsCH4(Float_t eV)
  62 {
  63 //Evaluate the absorbtion lenght of CH4 for a photon of energy eV in electron-volts
  64   const Float_t kLoschmidt=2.686763e19;                                      // LOSCHMIDT NUMBER IN CM-3
  65   const Float_t kPressure=750.0;          //mm of Hg
  66   const Float_t kTemperature=283.0;       //K (10 grad C)
  67   const Float_t kPn=kPressure/760.;
  68   const Float_t kTn=kTemperature/273.16;
  69   const Float_t kC0=-1.655279e-1;
  70   const Float_t kC1= 6.307392e-2;
  71   const Float_t kC2=-8.011441e-3;
  72   const Float_t kC3= 3.392126e-4;
  73
  74   Float_t crossSection=0;
  75   if (eV<7.75)
  76     crossSection=0.06e-22;
  77   else                 //------ METHANE CROSS SECTION cm-2 ASTROPH. J. 214, L47 (1978)
  78     crossSection=(kC0+kC1*eV+kC2*eV*eV+kC3*eV*eV*eV)*1.e-18;
  79
  80     Float_t density=kLoschmidt*kPn/kTn; //CH4 molecular concentration (cm^-3)
  81     return 1.0/(density*crossSection);
  82 }//AbsoCH4()
  83 //__________________________________________________________________________________________________
  84 void AliRICHParam::TestSeg()
  85 {
  86
  87   new TCanvas("name","PC segmentation");
  88   gPad->Range(-20,-20,200,150);
  89   AliRICHDisplFast::DrawSectors();
  90
  91   TLatex t; t.SetTextSize(0.02);
  92   t.DrawText(0,140,"View from interaction point");
  93   t.DrawLatex(PcSizeX()+10,120,Form("Pc  %6.2fx%6.2fcm %3ix%3ipads",PcSizeX()    ,PcSizeY(),    NpadsX()   ,NpadsY()));
  94   t.DrawLatex(PcSizeX()+10,115,Form("Sec %6.2fx%5.2fcm %3ix%2ipads",SectorSizeX(),SectorSizeY(),NpadsXsec(),NpadsYsec()));
  95   t.DrawLatex(PcSizeX()+10,110,Form("Pad %6.2fx%4.2fcm DeadZone %6.2fcm",PadSizeX()   ,PadSizeY(),DeadZone()));
  96
  97   TVector2 v2;
  98   t.SetTextAlign(12);
  99   v2=AliRICHParam::Pad2Loc( 1,24);  t.DrawText(v2.X(),v2.Y(),"sec 1");
 100   v2=AliRICHParam::Pad2Loc(81,24);  t.DrawText(v2.X(),v2.Y(),"sec 2");
 101   v2=AliRICHParam::Pad2Loc( 1,70);  t.DrawText(v2.X(),v2.Y(),"sec 3");
 102   v2=AliRICHParam::Pad2Loc(81,70);  t.DrawText(v2.X(),v2.Y(),"sec 4");
 103   v2=AliRICHParam::Pad2Loc( 1,120); t.DrawText(v2.X(),v2.Y(),"sec 5");
 104   v2=AliRICHParam::Pad2Loc(81,120); t.DrawText(v2.X(),v2.Y(),"sec 6");
 105
 106 //  TGaxis *pAx=new TGaxis(0,0,140,  0,0,140,510,"-="); pAx->SetTitle("x, cm"); pAx->SetTextSize(0.05); pAx->Draw();
 107 //  TGaxis *pAy=new TGaxis(0,0,  0,140,0,140,510,"-="); pAy->SetTitle("y, cm"); pAy->SetTextSize(0.05); pAy->Draw();
 108
 109
 110   t.SetTextColor(kBlue);
 111
 112   Double_t margin=5;
 113   Double_t x0=0; Double_t x1=SectorSizeX(); Double_t x2=SectorSizeX()+DeadZone(); Double_t x3=PcSizeX();
 114   Double_t y0=0; Double_t y1=SectorSizeY(); Double_t y2=SectorSizeY()+DeadZone();
 115   Double_t y3=2*SectorSizeY()+DeadZone(); Double_t y4=PcSizeY()-SectorSizeY();
 116   Double_t y5=PcSizeY();
 117
 118 //write pad numbers along x
 119   t.SetTextAlign(13); t.DrawText(x0,y0,"1");
 120   t.SetTextAlign(33); t.DrawText(x1,y0,"80");
 121   t.SetTextAlign(13); t.DrawText(x2,y0,"81");
 122   t.SetTextAlign(33); t.DrawText(x3,y0,"160");
 123 //write pad numbers along y
 124   t.SetTextAlign(31); t.DrawText(x0,y0,"1");
 125   t.SetTextAlign(33); t.DrawText(x0,y1,"48");
 126   t.SetTextAlign(31); t.DrawText(x0,y2,"49");
 127   t.SetTextAlign(33); t.DrawText(x0,y3,"96");
 128   t.SetTextAlign(31); t.DrawText(x0,y4,"97");
 129   t.SetTextAlign(33); t.DrawText(x0,y5,"144");
 130
 131
 132 //positions along x
 133   t.SetTextColor(kGreen);
 134   t.SetTextAlign(11);t.DrawText(x0,y0-margin,Form("%5.2f",x0));
 135   t.SetTextAlign(31);t.DrawText(x1,y0-margin,Form("%5.2f",x1));
 136   t.SetTextAlign(11);t.DrawText(x2,y0-margin,Form("%5.2f",x2));
 137   t.SetTextAlign(31);t.DrawText(x3,y0-margin,Form("%5.2f",x3));
 138 //positions along y
 139   t.SetTextAlign(31);t.DrawText(x0-margin,y0,Form("%5.2f",y0));
 140   t.SetTextAlign(33);t.DrawText(x0-margin,y1,Form("%5.2f",y1));
 141   t.SetTextAlign(31);t.DrawText(x0-margin,y2,Form("%5.2f",y2));
 142   t.SetTextAlign(33);t.DrawText(x0-margin,y3,Form("%5.2f",y3));
 143   t.SetTextAlign(31);t.DrawText(x0-margin,y4,Form("%5.2f",y4));
 144   t.SetTextAlign(33);t.DrawText(x0-margin,y5,Form("%5.2f",y5));
 145 //coners
 146   t.SetTextColor(kRed);
 147   t.SetTextSize(0.01);
 148   TVector pad(2);
 149 //sector 1
 150   v2=Pad2Loc(Loc2Pad(TVector2(x0,y0)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 151   v2=Pad2Loc(Loc2Pad(TVector2(x0,y1)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 152   v2=Pad2Loc(Loc2Pad(TVector2(x1,y1)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 153   v2=Pad2Loc(Loc2Pad(TVector2(x1,y0)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 154 //secr 3
 155   v2=Pad2Loc(Loc2Pad(TVector2(x0,y2)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 156   v2=Pad2Loc(Loc2Pad(TVector2(x0,y3)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 157   v2=Pad2Loc(Loc2Pad(TVector2(x1,y3)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 158   v2=Pad2Loc(Loc2Pad(TVector2(x1,y2)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 159 //secr 5
 160   v2=Pad2Loc(Loc2Pad(TVector2(x0,y4)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 161   v2=Pad2Loc(Loc2Pad(TVector2(x0,y5)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 162   v2=Pad2Loc(Loc2Pad(TVector2(x1,y5)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 163   v2=Pad2Loc(Loc2Pad(TVector2(x1,y4)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 164
 165   v2=Pad2Loc(Loc2Pad(TVector2(x2,y4)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 166   v2=Pad2Loc(Loc2Pad(TVector2(x2,y5)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 167   v2=Pad2Loc(Loc2Pad(TVector2(x3,y5)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 168   v2=Pad2Loc(Loc2Pad(TVector2(x3,y4)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 169
 170   v2=Pad2Loc(Loc2Pad(TVector2(x2,y2)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 171   v2=Pad2Loc(Loc2Pad(TVector2(x2,y3)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 172   v2=Pad2Loc(Loc2Pad(TVector2(x3,y3)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 173   v2=Pad2Loc(Loc2Pad(TVector2(x3,y2)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 174
 175   v2=Pad2Loc(Loc2Pad(TVector2(x2,y0)));t.SetTextAlign(11);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 176   v2=Pad2Loc(Loc2Pad(TVector2(x2,y1)));t.SetTextAlign(13);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 177   v2=Pad2Loc(Loc2Pad(TVector2(x3,y1)));t.SetTextAlign(33);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 178   v2=Pad2Loc(Loc2Pad(TVector2(x3,y0)));t.SetTextAlign(31);t.DrawText(v2.X(),v2.Y(),Form("%5.2f,%5.2f",v2.X(),v2.Y()));
 179 }//TestSeg()
 180 //__________________________________________________________________________________________________
 181 void AliRICHParam::TestResp()
 182 {
 183 //test the response set of methodes
 184   TCanvas *pC=new TCanvas("c","Amplification test",900,800);
 185   pC->Divide(1,2);
 186
 187
 188   const Int_t nPoints=8;
 189   THStack *pStackPhot=new THStack("StackPhot","photons");
 190   THStack *pStackMip =new THStack("StackMip","mips");
 191   TLegend *pLeg=new TLegend(0.6,0.2,0.9,0.5,"legend");
 192   TH1F *apHphot[nPoints];
 193   TH1F *apHmip[nPoints];
 194
 195   Double_t starty=0;
 196   Double_t deltay=AliRICHParam::SectorSizeY()/nPoints;
 197
 198   for(int i=0;i<nPoints;i++){
 199     apHphot[i]=new TH1F(Form("hphot%i",i),"Qdc for Photon;QDC;Counts",500,0,500); apHphot[i]->SetLineColor(i);pStackPhot->Add(apHphot[i]);
 200     apHmip[i] =new TH1F(Form("hmip%i",i),"Qdc for Mip;QDC;Counts",4000,0,4000);   apHmip[i]->SetLineColor(i);pStackMip->Add(apHmip[i]);
 201
 202     pLeg->AddEntry(apHphot[i],Form("@(10,%5.2f->%5.2f)",starty+i*deltay,starty+i*deltay-SectorSizeY()/2));
 203   }
 204
 205
 206   TVector2 x2(0,0);
 207   for(Int_t i=0;i<10000;i++){//events loop
 208     for(int j=0;j<nPoints;j++){
 209       x2.Set(10,starty+j*deltay);
 210       apHphot[j]->Fill(TotQdc(x2,0));
 211       apHmip[j]->Fill(TotQdc(x2,gRandom->Landau(600,150)*1e-9));
 212     }
 213   }
 214
 215   pC->cd(1);  pStackMip->Draw("nostack");
 216   pC->cd(2);  pStackPhot->Draw("nostack"); pLeg->Draw();
 217 }//TestResp()
 218 //__________________________________________________________________________________________________
 219 void AliRICHParam::TestTrans()
 220 {
 221 //test the set of transformation methods
 222   new TCanvas("trasform","Test LRS-MRS transform");
 223   TLatex t; t.SetTextSize(0.02);
 224
 225   TView *pView=new TView(1);
 226   pView->SetRange(-600,-600,-600,600,600,600);
 227   DrawAxis();
 228 //Draw PC for all chambers by trasfering Pc plane using Pc2Mrs methode
 229   Int_t iNpointsX=50,iNpointsY=50;
 230   for(Int_t iChamberN=1;iChamberN<=7;iChamberN++){//chamber loop
 231     TPolyMarker3D *pChamber=new TPolyMarker3D(iNpointsX*iNpointsY);
 232     Int_t i=0;
 233     for(Double_t x=0;x<PcSizeX();x+=PcSizeX()/iNpointsX)
 234       for(Double_t y=0;y<PcSizeY();y+=PcSizeY()/iNpointsY){//step loop
 235         TVector3 v3=C(iChamberN)->Pc2Mrs(TVector2(x,y));//from regular grid of local PC points to MRS presentation
 236         pChamber->SetPoint(i++,v3.X(),v3.Y(),v3.Z());//Pc plane poing in MRS
 237       }//step loop
 238     pChamber->SetMarkerSize(1);
 239     pChamber->SetMarkerColor(iChamberN);
 240     pChamber->Draw();
 241     t.SetNDC();t.SetTextColor(iChamberN); t.DrawText(0.1,iChamberN*0.1,Form("Chamber %i",iChamberN));
 242   }//chamber loop
 243 //  gPad->GetView()->RotateView(94,45);
 244 }//TestTrans()
 245 //__________________________________________________________________________________________________
 246 void AliRICHParam::DrawAxis()
 247 {
 248   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};
 249   TPolyLine3D *pXaxis=new TPolyLine3D(2,X);pXaxis->SetLineColor(kRed);   pXaxis->Draw();
 250   TPolyLine3D *pYaxis=new TPolyLine3D(2,Y);pYaxis->SetLineColor(kGreen); pYaxis->Draw();
 251   TPolyLine3D *pZaxis=new TPolyLine3D(2,Z);pZaxis->SetLineColor(kBlue);  pZaxis->Draw();
 252 }