+// **************************************************************************
+// * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+// * *
+// * Author: The ALICE Off-line Project. *
+// * Contributors are mentioned in the code where appropriate. *
+// * *
+// * Permission to use, copy, modify and distribute this software and its *
+// * documentation strictly for non-commercial purposes is hereby granted *
+// * without fee, provided that the above copyright notice appears in all *
+// * copies and that both the copyright notice and this permission notice *
+// * appear in the supporting documentation. The authors make no claims *
+// * about the suitability of this software for any purpose. It is *
+// * provided "as is" without express or implied warranty. *
+// **************************************************************************
#include "AliRICHParam.h"
-#include "AliRICHConst.h"
-#include <TMath.h>
-#include <TRandom.h>
-
+#include "AliESD.h"
+#include "AliRICHChamber.h"
+#include <TCanvas.h>
+#include <TLatex.h>
+#include <THStack.h>
+#include <TLegend.h>
+#include <TView.h>
+#include <TPolyMarker3D.h>
+#include <TPolyLine3D.h>
+#include <TPolyLine.h>
+#include <TSystem.h>
+#include <TVector2.h>
+#include <TVector3.h>
+#include <TRotation.h>
+
+
ClassImp(AliRICHParam)
+Bool_t AliRICHParam::fgIsWireSag =kTRUE; //take ware sagita into account?
+Bool_t AliRICHParam::fgIsResolveClusters =kTRUE; //do cluster resolving?
+Bool_t AliRICHParam::fgIsFeedback =kTRUE; //generate feedback photons?
+Bool_t AliRICHParam::fgIsRadioSrc =kFALSE; //put radioactive source instead of radiators?
+Bool_t AliRICHParam::fgIsAerogel =kFALSE; //special aerogel configuration
+Bool_t AliRICHParam::fgIsTestBeam =kFALSE; //special test beam configuration
+
+Int_t AliRICHParam::fgHV[kNsectors] ={2050,2050,2050,2050,2050,2050};
+Int_t AliRICHParam::fgNsigmaTh =4;
+Float_t AliRICHParam::fgSigmaThMean =1.132; //QDC
+Float_t AliRICHParam::fgSigmaThSpread =0.035; //
+Double_t AliRICHParam::fgErrChrom[4][330]; //
+Double_t AliRICHParam::fgErrGeom[4][330]; //
+Double_t AliRICHParam::fgErrLoc[4][330]; //Chromatic, Geometric and Localization array to parametrize SigmaCerenkov
+
-// RICH main parameters manipulator
-//__________________________________________________________________________________________________
-AliRICHParam::AliRICHParam():
-fNpadsX(0),fNpadsY(0),fNpadsXsector(0),fNpadsYsector(0),
-fDeadZone(0),
-fPadSizeX(0),fPadSizeY(0),
-fSectorSizeX(0),fSectorSizeY(0),
-fWirePitch(0),
-fCurrentPadX(0),fCurrentPadY(0),fCurrentWire(0),
-fSizeZ(0),
-fAngleRot(0),fAngleYZ(0),fAngleXY(0),
-fOffset(0),
-fGapThickness(0),
-fProximityGapThickness(0),
-fQuartzLength(0),
-fQuartzWidth(0),
-fQuartzThickness(0),
-fOuterFreonLength(0),
-fOuterFreonWidth(0),
-fInnerFreonLength(0),
-fInnerFreonWidth(0),
-fFreonThickness(0),
-fRadiatorToPads(0),
-fPcSizeX(0),
-fPcSizeY(0),
-fChargeSlope(0),
-fChargeSpreadX(0),
-fChargeSpreadY(0),
-fSigmaIntegration(0),
-fAlphaFeedback(0),
-fEIonisation(0),
-fMaxAdc(0),
-fSqrtKx3(0),
-fKx2(0),
-fKx4(0),
-fSqrtKy3(0),
-fKy2(0),
-fKy4(0),
-fPitch(0),
-fWireSag(0),
-fVoltage(0)
-{//defines the default parameters
- Segmentation (144,160); //nx,ny for the whole chamber
- DeadZone (3*kcm); //spacer between PC planes
- PadSize (8.4*kmm,8.0*kmm);
- fWirePitch=PadSizeX()/2;
-
- Size (132.6*kcm,26*kcm,136.7*kcm); //full length, not GEANT half notation
- AngleRot (60); //rotation of the whole RICH around Z, deg
- Angles (20,19.5); //XY angle, YZ angle deg
- Offset (490*kcm+1.267*kcm); //1.267???????cm distance from IP to the center of module
- GapThickness (8*kcm);
- ProximityGapThickness(0.4*kcm);
- QuartzLength (133*kcm);
- QuartzWidth (127.9*kcm);
- QuartzThickness (0.5*kcm);
- OuterFreonLength (133*kcm);
- OuterFreonWidth (41.3*kcm);
- InnerFreonLength (133*kcm);
- InnerFreonWidth (41.3*kcm);
- FreonThickness (1.5*kcm);
- RadiatorToPads (80*kmm);
-
- ChargeSlope(27.);
- ChargeSpreadX(0.18);ChargeSpreadY(0.18);
- SigmaIntegration(5.);
- MaxAdc(4096);
- AlphaFeedback(0.036);
- EIonisation(26.e-9);
- SqrtKx3(0.77459667);
- Kx2(0.962);
- Kx4(0.379);
- SqrtKy3(0.77459667);
- Ky2(0.962);
- Ky4(0.379);
- Pitch(0.25);
- WireSag(1); // 1->On, 0->Off
- Voltage(2150); // Should only be 2000, 2050, 2100 or 2150
-
- Recalc();
-}//AliRICHParam::named ctor
-//__________________________________________________________________________________________________
-void AliRICHParam::Recalc()
-{//recalculate
- fNpadsXsector=NpadsX()/3; fNpadsYsector=NpadsY()/2;
- fPcSizeX=NpadsX()*fPadSizeX+2*fDeadZone;
- fPcSizeY=NpadsY()*fPadSizeY+fDeadZone;
- fSectorSizeX=(fPcSizeX-2*fDeadZone)/3;
- fSectorSizeY=(fPcSizeY-fDeadZone)/2;
-}//void AliRICHParam::Recalc()
-//__________________________________________________________________________________________________
-Int_t AliRICHParam::Sector(Float_t &x, Float_t &y)const
-{//Determines sector for a given hit (x,y) and trasform this point to the local system of that sector.
-
- Int_t sector=kBad;
- if(x<=-fSectorSizeX/2-fDeadZone&&x>=-fPcSizeX/2) {sector=1;x+=fPcSizeX/2;}
- else if(x>=-fSectorSizeX/2 && x<=fSectorSizeX/2) {sector=2;x+=fSectorSizeX/2;}
- else if(x>= fSectorSizeX/2+fDeadZone&&x<=fPcSizeX/2) {sector=3;x-=fSectorSizeX/2+fDeadZone;}
- else if(x<-fPcSizeX/2||x>fPcSizeX/2) {Error("Sector","given x position is out of active PC area");return kBad;}
- else {return kBad;} //in dead zone
-
- if(y>=-fPcSizeY/2&&y<= -fDeadZone/2) {y+=fPcSizeY/2; return -sector;}
- else if(y>-fDeadZone/2&&y<fDeadZone/2) {return kBad;} //in dead zone
- else if(y>=fDeadZone/2&&y<=fPcSizeY/2) {y-=fDeadZone/2; return sector;}
- else {Error("Sector","given y position is out of active PC area");return kBad;}
-}//Int_t AliRICHParam::Sector(Float_t x, Float_t y)
-//__________________________________________________________________________________________________
-Int_t AliRICHParam::L2P(Float_t x, Float_t y, Int_t &padx, Int_t &pady)const
-{//returns pad numbers (iPadX,iPadY) for given point in local coordinates (x,y)
- //count starts in lower left corner from 1,1 to 144,180
-
- padx=pady=kBad;
- Int_t sector=Sector(x,y);
- if(sector==kBad) return sector;
-
- padx=Int_t(x/fPadSizeX)+1;
- if(padx>fNpadsXsector) padx=fNpadsXsector;
- if(sector==2||sector==-2) padx+=fNpadsXsector;
- else if(sector==3||sector==-3) padx+=fNpadsXsector*2;
-
- pady=Int_t(y/fPadSizeY)+1;
- if(pady>fNpadsYsector) padx=fNpadsYsector;
- if(sector>0) pady+=fNpadsYsector;
-
- return sector;
-}//void AliRICHParam::L2P(Float_t x, Float_t y, Int_t &padx, Int_t &pady)
-//__________________________________________________________________________________________________
-Float_t AliRICHParam::Gain(Float_t y)
-{//Calculates the gain
- if(fWireSag){
- Float_t gainK=9e-6*TMath::Power(y,4)+2e-7*TMath::Power(y,3)-0.0316*TMath::Power(y,2)-3e-4*y+25.367;
- Float_t gain = (ChargeSlope()+ChargeSlope()*gainK/100)*0.9;
- return -gain*TMath::Log(gRandom->Rndm());
- }else
- return -ChargeSlope()*TMath::Log(gRandom->Rndm());
-}//Float_t AliRICHParam::IntPH(Float_t yhit)
-//__________________________________________________________________________________________________
-Float_t AliRICHParam::TotalCharge(Int_t iPID,Float_t eloss,Float_t y)
-{//Get number of electrons and return charge
+//__________________________________________________________________________________________________
+void AliRICHParam::Print(Option_t*) const
+{
+//print some usefull (hopefully) info on some internal guts of RICH parametrisation
+ AliInfo(Form("Pads in chamber (%3i,%3i) in sector (%2i,%2i) pad size (%4.2f,%4.2f)",NpadsX(),NpadsY(),NpadsXsec(),NpadsYsec(),PadSizeX(),PadSizeY()));
+ AliInfo(Form("Resolve clusters %i sagita %i Radio source %i Aerogel %i TestBeam %i",
+ IsResolveClusters(),IsWireSag(),IsRadioSrc(),IsAerogel(),IsTestBeam()));
+ fpChambers->Print();
+}//Print()
+//__________________________________________________________________________________________________
+void AliRICHParam::CreateChambers()
+{
+//Create all RICH Chambers on each call. Previous chambers deleted.
+ if(fpChambers) delete fpChambers;
+ if(fgIsTestBeam){
+ fpChambers=new TObjArray(1);//test beam configuration 1 chamber
+ fpChambers->AddAt(new AliRICHChamber(0),0);
+ }else{
+ fpChambers=new TObjArray(kNchambers);//normal configuration 7 chambers
+ for(int iChamberN=0;iChamberN<kNchambers;iChamberN++) fpChambers->AddAt(new AliRICHChamber(iChamberN+1),iChamberN);
+ }
+ fpChambers->SetOwner();
+}//CreateChambers()
+//__________________________________________________________________________________________________
+Float_t AliRICHParam::AbsCH4(Float_t eV)
+{
+//Evaluate the absorbtion lenght of CH4 for a photon of energy eV in electron-volts
+ const Float_t kLoschmidt=2.686763e19; // LOSCHMIDT NUMBER IN CM-3
+ const Float_t kPressure=750.0; //mm of Hg
+ const Float_t kTemperature=283.0; //K (10 grad C)
+ const Float_t kPn=kPressure/760.;
+ const Float_t kTn=kTemperature/273.16;
+ const Float_t kC0=-1.655279e-1;
+ const Float_t kC1= 6.307392e-2;
+ const Float_t kC2=-8.011441e-3;
+ const Float_t kC3= 3.392126e-4;
+
+ Float_t crossSection=0;
+ if (eV<7.75)
+ crossSection=0.06e-22;
+ else //------ METHANE CROSS SECTION cm-2 ASTROPH. J. 214, L47 (1978)
+ crossSection=(kC0+kC1*eV+kC2*eV*eV+kC3*eV*eV*eV)*1.e-18;
- if(iPID>50000)//it's photon no more then 1 electron after photoelectron conversion
- return Gain(y);
- else{
- Int_t iNelectrons=Int_t(eloss/fEIonisation);if(iNelectrons==0) iNelectrons=1;
- Float_t charge=0;
- for(Int_t i=1;i<=iNelectrons;i++)
- charge+=Gain(y);
- return charge;
+ Float_t density=kLoschmidt*kPn/kTn; //CH4 molecular concentration (cm^-3)
+ return 1.0/(density*crossSection);
+}//AbsoCH4()
+//__________________________________________________________________________________________________
+void AliRICHParam::TestSeg()
+{
+//Provides a set of pictures to test segementation currently in use.
+ new TCanvas("pads","PC segmentation - pads display",700,600);
+ gPad->Range(-5,-5,PcSizeX()+5,PcSizeY()+15);
+ TVector p(2); TVector2 c; TVector2 b; //current: pad, pad center, pad boundary
+// list of corners:
+ Double_t x0=0,x1=SectorSizeX(),x2=SectorSizeX()+DeadZone(), x3=PcSizeX();
+ Double_t y0=0,y1=SectorSizeY(),y2=SectorSizeY()+DeadZone(),y3=2*SectorSizeY()+DeadZone(),y4=PcSizeY()-SectorSizeY(),y5=PcSizeY();
+ DrawSectors();
+//header
+ TLatex t;
+ t.SetTextSize(0.02); t.SetTextColor(kBlack); t.SetTextAlign(11);
+ t.DrawLatex(0,PcSizeY()+10,Form("IP in front of this page. pad size %.2fx%.2fcm dead zone %.2fcm",PadSizeX(),PadSizeY(),DeadZone()));
+ t.DrawLatex(0,PcSizeY()+ 5,Form("Pc %.2fx%.2f cm %ix%i pads Sec %.2fx%.2f cm %ix%i pads",
+ PcSizeX() , PcSizeY() , NpadsX() , NpadsY() ,
+ SectorSizeX() , SectorSizeY() , NpadsXsec() , NpadsYsec() ));
+//sectors
+ t.SetTextSize(0.015); t.SetTextColor(kRed); t.SetTextAlign(22);
+ c=Pad2Loc( 40, 24); t.DrawText(c.X(),c.Y(),Form("sec 1 (%.2f,%.2f)",c.X(),c.Y() ));
+ c=Pad2Loc( 40, 75); t.DrawText(c.X(),c.Y(),Form("sec 3 (%.2f,%.2f)",c.X(),c.Y() ));
+ c=Pad2Loc( 40,121); t.DrawText(c.X(),c.Y(),Form("sec 5 (%.2f,%.2f)",c.X(),c.Y() ));
+ c=Pad2Loc(120, 24); t.DrawText(c.X(),c.Y(),Form("sec 2 (%.2f,%.2f)",c.X(),c.Y() ));
+ c=Pad2Loc(120, 75); t.DrawText(c.X(),c.Y(),Form("sec 4 (%.2f,%.2f)",c.X(),c.Y() ));
+ c=Pad2Loc(120,121); t.DrawText(c.X(),c.Y(),Form("sec 6 (%.2f,%.2f)",c.X(),c.Y() ));
+//coners
+ t.SetTextSize(0.015); t.SetTextColor(kBlue);
+
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+ 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()));
+}//TestSeg()
+//__________________________________________________________________________________________________
+void AliRICHParam::TestResp()
+{
+//Provides a set of plot to check the response parametrisation currently in use.
+ TCanvas *pC=new TCanvas("c","Amplification test",900,800);
+ pC->Divide(1,2);
+
+
+ const Int_t kNpoints=8;
+ THStack *pStackPhot=new THStack("StackPhot","photons");
+ THStack *pStackMip =new THStack("StackMip","mips");
+ TLegend *pLeg=new TLegend(0.6,0.2,0.9,0.5,"legend");
+ TH1F *apHphot[kNpoints];
+ TH1F *apHmip[kNpoints];
+
+ Double_t starty=0;
+ Double_t deltay=AliRICHParam::SectorSizeY()/kNpoints;
+
+ for(int i=0;i<kNpoints;i++){
+ apHphot[i]=new TH1F(Form("hphot%i",i),"Qdc for Photon;QDC;Counts",500,0,500); apHphot[i]->SetLineColor(i);pStackPhot->Add(apHphot[i]);
+ apHmip[i] =new TH1F(Form("hmip%i",i),"Qdc for Mip;QDC;Counts",4000,0,4000); apHmip[i]->SetLineColor(i);pStackMip->Add(apHmip[i]);
+
+ pLeg->AddEntry(apHphot[i],Form("@(10,%5.2f->%5.2f)",starty+i*deltay,starty+i*deltay-SectorSizeY()/2));
+ }
+
+
+ TVector2 x2(0,0);
+ for(Int_t i=0;i<10000;i++){//events loop
+ for(int j=0;j<kNpoints;j++){
+ x2.Set(10,starty+j*deltay);
+ apHphot[j]->Fill(TotQdc(x2,0));
+ apHmip[j]->Fill(TotQdc(x2,gRandom->Landau(600,150)*1e-9));
+ }
+ }
+
+ pC->cd(1); pStackMip->Draw("nostack");
+ pC->cd(2); pStackPhot->Draw("nostack"); pLeg->Draw();
+}//TestResp()
+//__________________________________________________________________________________________________
+void AliRICHParam::TestTrans()
+{
+//Provides a set of plots to test transformation methods
+ new TCanvas("trasform","Test LRS-MRS transform");
+ TLatex t; t.SetTextSize(0.02);
+
+ TView *pView=new TView(1);
+ pView->SetRange(-600,-600,-600,600,600,600);
+ DrawAxis();
+//Draw PC for all chambers by trasfering Pc plane using Pc2Mrs methode
+ Int_t iNpointsX=50,iNpointsY=50;
+ for(Int_t iChamberN=1;iChamberN<=7;iChamberN++){//chamber loop
+ TPolyMarker3D *pChamber=new TPolyMarker3D(iNpointsX*iNpointsY);
+ Int_t i=0;
+ for(Double_t x=0;x<PcSizeX();x+=PcSizeX()/iNpointsX)
+ for(Double_t y=0;y<PcSizeY();y+=PcSizeY()/iNpointsY){//step loop
+ TVector3 v3=C(iChamberN)->Pc2Mrs(TVector2(x,y));//from regular grid of local PC points to MRS presentation
+ pChamber->SetPoint(i++,v3.X(),v3.Y(),v3.Z());//Pc plane poing in MRS
+ }//step loop
+ pChamber->SetMarkerSize(1);
+ pChamber->SetMarkerColor(iChamberN);
+ pChamber->Draw();
+ t.SetNDC();t.SetTextColor(iChamberN); t.DrawText(0.1,iChamberN*0.1,Form("Chamber %i",iChamberN));
+ }//chamber loop
+// gPad->GetView()->RotateView(94,45);
+}//TestTrans()
+//__________________________________________________________________________________________________
+void AliRICHParam::DrawAxis()
+{
+//Utility: draws axis on geometry scene
+ 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};
+ TPolyLine3D *pXaxis=new TPolyLine3D(2,x);pXaxis->SetLineColor(kRed); pXaxis->Draw();
+ TPolyLine3D *pYaxis=new TPolyLine3D(2,y);pYaxis->SetLineColor(kGreen); pYaxis->Draw();
+ TPolyLine3D *pZaxis=new TPolyLine3D(2,z);pZaxis->SetLineColor(kBlue); pZaxis->Draw();
+}
+//__________________________________________________________________________________________________
+void AliRICHParam::DrawSectors()
+{
+//Utility: draws RICH chamber sectors on event display.
+ Double_t xLeft[5] = {0,0,SectorSizeX(),SectorSizeX(),0};
+ Double_t xRight[5] = {SectorSizeX()+DeadZone(),SectorSizeX()+DeadZone(),PcSizeX(),PcSizeX(),SectorSizeX()+DeadZone()};
+
+ Double_t yDown[5] = {0,SectorSizeY(),SectorSizeY(),0,0};
+ Double_t yCenter[5] = { SectorSizeY()+DeadZone(),2*SectorSizeY()+DeadZone(),2*SectorSizeY()+DeadZone(),
+ SectorSizeY()+DeadZone(),SectorSizeY()+DeadZone()};
+ Double_t yUp[5] = {2*SectorSizeY()+2*DeadZone(),PcSizeY(),PcSizeY(),2*SectorSizeY()+2*DeadZone(),2*SectorSizeY()+2*DeadZone()};
+
+ TPolyLine *sec1 = new TPolyLine(5,xLeft ,yDown); sec1->SetLineColor(21); sec1->Draw();
+ TPolyLine *sec2 = new TPolyLine(5,xRight,yDown); sec2->SetLineColor(21); sec2->Draw();
+ TPolyLine *sec3 = new TPolyLine(5,xLeft ,yCenter); sec3->SetLineColor(21); sec3->Draw();
+ TPolyLine *sec4 = new TPolyLine(5,xRight,yCenter); sec4->SetLineColor(21); sec4->Draw();
+ TPolyLine *sec5 = new TPolyLine(5,xLeft, yUp); sec5->SetLineColor(21); sec5->Draw();
+ TPolyLine *sec6 = new TPolyLine(5,xRight,yUp); sec6->SetLineColor(21); sec6->Draw();
+}//DrawSectors()
+//__________________________________________________________________________________________________
+void AliRICHParam::ReadErrFiles()
+{
+// Read the three files corresponding to Chrom,Geom and Loc
+// They are parameters of a polynomial of 6th order...
+
+ static Bool_t count = kFALSE;
+
+ Float_t c0,c1,c2,c3,c;
+ Float_t g0,g1,g2,g3,g;
+ Float_t l0,l1,l2,l3,l;
+
+ FILE *pChromErr, *pGeomErr, *pLocErr;
+
+ if(!count) {
+ AliInfoGeneral("ReadErrFiles","reading RICH error parameters...");
+ pChromErr = fopen(Form("%s/RICH/RICHConfig/SigmaChromErr.txt",gSystem->Getenv("ALICE_ROOT")),"r");
+ pGeomErr = fopen(Form("%s/RICH/RICHConfig/SigmaGeomErr.txt",gSystem->Getenv("ALICE_ROOT")),"r");
+ pLocErr = fopen(Form("%s/RICH/RICHConfig/SigmaLocErr.txt",gSystem->Getenv("ALICE_ROOT")),"r");
+ if(!pChromErr||!pGeomErr||!pLocErr) {AliErrorGeneral("ReadErrFiles"," RICH ERROR READING Parameter FILES: can't open files!!! ");return;}
+ for(Int_t i=0;i<330;i++) {
+ fscanf(pChromErr,"%f%f%f%f%f\n",&c0,&c1,&c2,&c3,&c);
+ fscanf(pGeomErr,"%f%f%f%f%f\n",&g0,&g1,&g2,&g3,&g);
+ fscanf(pLocErr,"%f%f%f%f%f\n",&l0,&l1,&l2,&l3,&l);
+ fgErrChrom[0][i] = c0;
+ fgErrChrom[1][i] = c1;
+ fgErrChrom[2][i] = c2;
+ fgErrChrom[3][i] = c3;
+ fgErrGeom[0][i] = g0;
+ fgErrGeom[1][i] = g1;
+ fgErrGeom[2][i] = g2;
+ fgErrGeom[3][i] = g3;
+ fgErrLoc[0][i] = l0;
+ fgErrLoc[1][i] = l1;
+ fgErrLoc[2][i] = l2;
+ fgErrLoc[3][i] = l3;
+ }
+ AliInfoGeneral("ReadErrFiles","DONE successfully!");
+ fclose(pChromErr);
+ fclose(pGeomErr);
+ fclose(pLocErr);
+ }
+ count = kTRUE;
+}//ReadErrFiles()
+//__________________________________________________________________________________________________
+TVector3 AliRICHParam::SigmaSinglePhoton(Int_t partID, Double_t mom, Double_t theta, Double_t phi)
+
+{
+// Find sigma for single photon. It returns the thrree different errors. If you want
+// to have the error---> TVector3.Mag()
+
+ TVector3 v(-999,-999,-999);
+ Double_t pmom;
+
+ ReadErrFiles();
+ Double_t mass = AliPID::ParticleMass(partID);
+ Double_t massRef = AliPID::ParticleMass(AliPID::kProton); // all the files are calculated for protons...so mass ref is proton mass
+ pmom = mom*massRef/mass; // normalized momentum respect to proton...
+ if(pmom>6.5) pmom = 6.5;
+ Double_t oneOverRefIndex = 1/RefIdxC6F14(6.755);
+ Double_t pmin = mass*oneOverRefIndex/TMath::Sqrt(1-oneOverRefIndex*oneOverRefIndex);
+ if(pmom<pmin) return v;
+ v.SetX(Interpolate(fgErrChrom,pmom,theta,phi));
+ v.SetY(Interpolate(fgErrGeom,pmom,theta,phi));
+ v.SetZ(Interpolate(fgErrLoc,pmom,theta,phi));
+
+ return v;
+}//SigmaSinglePhoton
+//__________________________________________________________________________________________________
+Double_t AliRICHParam::Interpolate(Double_t par[4][330], Double_t x, Double_t y, Double_t phi)
+
+{
+ static Double_t amin = 1.15; static Double_t astep = 0.2;
+ static Double_t bmin = 0; static Double_t bstep = 1;
+
+ Double_t Phi = (phi - 180)/300.;
+
+ Double_t Sigma[30][11];
+
+ for(Int_t j=0;j<11;j++) { for(Int_t i=0;i<30;i++) {
+ Sigma[i][j] = par[0][j+11*i] + par[1][j+11*i]*Phi*Phi + par[2][j+11*i]*TMath::Power(Phi,4) + par[3][j+11*i]*TMath::Power(Phi,6);
+ }
}
-}//Float_t AliRICHParam::TotalCharge(Int_t iPID,Float_t eloss, Float_t y)
+
+ Int_t i=0;Int_t j=0;
+
+ i = (Int_t)((x-amin)/astep);
+ j = (Int_t)((y-bmin)/bstep);
+ Double_t ai = amin+i*astep;
+ Double_t ai1 = ai+astep;
+ Double_t bj = bmin+j*bstep;
+ Double_t bj1 = bj+bstep;
+ Double_t t = (x-ai)/(ai1-ai);
+ Double_t gj = (1-t)*Sigma[i][j]+t*Sigma[i+1][j];
+ Double_t gj1 = (1-t)*Sigma[i][j+1]+t*Sigma[i+1][j+1];
+ Double_t u = (y-bj)/(bj1-bj);
+ return (1-u)*gj+u*gj1;
+}//Interpolate
//__________________________________________________________________________________________________
-void AliRICHParam::FirstPad(Float_t x,Float_t y)
+TVector3 AliRICHParam::ForwardTracing(TVector3 entranceTrackPoint, TVector3 vectorTrack, Double_t thetaC, Double_t phiC)
{
- Int_t padx,pady;
- L2P(x,y,padx,pady);
-}//void AliRICHParam::FirstPad(Float_t x,Float_t y)
+//
+ TVector3 vBad(-999,-999,-999);
+ TVector3 nPlane(0,0,1);
+ Double_t planeZposition = 0.5*Zfreon();
+ TVector3 planePoint(0,0,planeZposition);
+ TVector3 emissionPoint = PlaneIntersect(vectorTrack,entranceTrackPoint,nPlane,planePoint);
+// emissionPoint.Dump();
+ Double_t thetaout,phiout;
+ AnglesInDRS(vectorTrack.Theta(),vectorTrack.Phi(),thetaC,phiC,thetaout,phiout);
+// cout << "thetaout "<<thetaout << " phiout " << phiout << endl;
+ TVector3 vectorPhotonInC6F14;
+ vectorPhotonInC6F14.SetMagThetaPhi(1,thetaout,phiout);
+// vectorPhotonInC6F14.Dump();
+// planeZposition=AliRICHParam::C6F14Thickness();
+ planeZposition=Zfreon();
+ planePoint.SetXYZ(0,0,planeZposition);
+ TVector3 entranceToSiO2Point = PlaneIntersect(vectorPhotonInC6F14,emissionPoint,nPlane,planePoint);
+// entranceToSiO2Point.Dump();
+
+ Double_t photonEn = MeanCkovEnergy();
+ Double_t angleInSiO2 = SnellAngle(RefIdxC6F14(photonEn),RefIdxSiO2(photonEn),vectorPhotonInC6F14.Theta());if(angleInSiO2<0) return vBad;
+ TVector3 vectorPhotonInSiO2;
+ vectorPhotonInSiO2.SetMagThetaPhi(1,angleInSiO2,phiout);
+// planeZposition+=AliRICHParam::SiO2Thickness();
+ planeZposition+=Zwin();
+ planePoint.SetXYZ(0,0,planeZposition);
+ TVector3 entranceToCH4 = PlaneIntersect(vectorPhotonInSiO2,entranceToSiO2Point,nPlane,planePoint);
+// entranceToCH4.Dump();
+
+ // Double_t angleInCH4 = SnellAngle(AliRICHParam::IndOfRefSiO2(6.755),AliRICHParam::IndOfRefCH4,angleInSiO2);
+ Double_t angleInCH4 = SnellAngle(RefIdxSiO2(photonEn),RefIdxCH4(photonEn),vectorPhotonInSiO2.Theta());if(angleInCH4<0) return vBad;
+ TVector3 vectorPhotonInCH4;
+ vectorPhotonInCH4.SetMagThetaPhi(1,angleInCH4,phiout);
+// planeZposition+=AliRICHParam::GapProx();
+ planeZposition+=Pc2Win();
+ planePoint.SetXYZ(0,0,planeZposition);
+ TVector3 impactToPC = PlaneIntersect(vectorPhotonInCH4,entranceToCH4,nPlane,planePoint);
+// impactToPC.Dump();
+ return impactToPC;
+}//FowardTracing
+//__________________________________________________________________________________________________
+TVector3 AliRICHParam::PlaneIntersect(TVector3 vstart,TVector3 p0,TVector3 n,TVector3 v0)
+{
+//
+ TVector3 parallel(-999,-999,-999);
+ // vstart = given vector
+ // p0 = origin of the given vector
+ // n = normal to a given plane
+ // v0 = point of the given plane
+// cout << " n*vstart = " << n*vstart << endl;
+ if(n*vstart==0) return parallel;
+ TVector3 diff=v0-p0;
+ Double_t sint=(n*diff)/(n*vstart);
+ return p0+sint*vstart;
+}//PlaneIntersect
+//__________________________________________________________________________________________________
+Double_t AliRICHParam::SnellAngle(Float_t n1, Float_t n2, Float_t theta1)
+{
+// Snell law
+// Compute the Snell angle
+
+ Double_t sinrefractangle;
+ Double_t refractangle;
+
+ sinrefractangle = (n1/n2)*sin(theta1);
+
+ if(sinrefractangle>1.) {
+ // cout << " PROBLEMS IN SNELL ANGLE !!!!! " << endl;
+ refractangle = -999.;
+ return refractangle;
+ }
+
+ refractangle = asin(sinrefractangle);
+ return refractangle;
+}//SnellAngle
+//__________________________________________________________________________________________________
+void AliRICHParam::AnglesInDRS(Double_t trackTheta,Double_t trackPhi,Double_t thetaCerenkov,Double_t phiCerenkov,Double_t &tout,Double_t &pout)
+{
+// Setup the rotation matrix of the track...
+
+ TRotation mtheta;
+ TRotation mphi;
+ TRotation minv;
+ TRotation mrot;
+
+ mtheta.RotateY(trackTheta);
+ mphi.RotateZ(trackPhi);
+
+ mrot = mphi * mtheta;
+ // minv = mrot.Inverse();
+
+ TVector3 photonInRadiator(1,1,1);
+
+ photonInRadiator.SetTheta(thetaCerenkov);
+ photonInRadiator.SetPhi(phiCerenkov);
+ photonInRadiator = mrot * photonInRadiator;
+ tout=photonInRadiator.Theta();
+ pout=photonInRadiator.Phi();
+}//AnglesInDRS
+//__________________________________________________________________________________________________
+
+//__________________________________________________________________________________________________
+//__________________________________________________________________________________________________
+/*
+void DrawRing()
+{
+
+ // Float_t xGraph[1000],yGraph[1000];
+
+ Float_t type;
+ Float_t MassOfParticle;
+ Float_t beta;
+ Float_t nfreon;
+
+ Float_t ThetaCerenkov;
+
+ Float_t Xtoentr = GetEntranceX();
+ Float_t Ytoentr = GetEntranceY();
+
+ Float_t pmod = GetTrackMomentum();
+ Float_t TrackTheta = GetTrackTheta();
+ Float_t TrackPhi = GetTrackPhi();
+
+ SetPhotonEnergy(AliRICHParam::MeanCkovEnergy());
+ SetFreonRefractiveIndex();
+
+ SetEmissionPoint(RadiatorWidth/2.);
+
+ ThetaCerenkov = GetThetaCerenkov();
+ FindBetaFromTheta(ThetaCerenkov);
+ nfreon = GetFreonRefractiveIndex();
+
+ Int_t nPoints = 100;
+
+ Int_t nPointsToDraw = 0;
+ for(Int_t i=0;i<nPoints;i++)
+ {
+ Float_t phpad = 2*TMath::Pi()*i/nPoints;
+ SetThetaPhotonInTRS(thetacer);
+ SetPhiPhotonInTRS(phpad);
+ FindPhotonAnglesInDRS();
+ Float_t Radius = FromEmissionToCathode();
+ if (Radius == 999.) continue;
+ xGraph[nPointsToDraw] = GetXPointOnCathode() + GetShiftX();
+ yGraph[nPointsToDraw] = GetYPointOnCathode() + GetShiftY();
+ nPointsToDraw++;
+ }
+ gra = new TGraph(nPointsToDraw,xGraph,yGraph);
+ gra->Draw("AC");
+}
+//__________________________________________________________________________________________________
+*/
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff