#ifndef AliRICHParam_h
#define AliRICHParam_h
-#include "AliRICHConst.h"
+#include <TError.h>
+#include <TMath.h>
+#include <TObjArray.h>
#include <TObject.h>
#include <TMath.h>
+#include <TRandom.h>
+#include <TVector.h>
+#include <TVector2.h>
#include <TVector3.h>
#include <TRandom.h>
+#include <TError.h>
+#include <TObjArray.h>
+#include <AliLog.h>
+#include <TClass.h>
+
+
+static const int kNchambers=7; //number of RICH chambers
+static const int kNpadsX = 160; //number of pads along X in single chamber
+static const int kNpadsY = 144; //number of pads along Y in single chamber
+static const int kBad=-101; //useful static const to mark initial (uninitalised) values
+static const int kNsectors=6; //number of sectors per chamber
+
+static const int kCerenkov=50000050; //??? go to something more general like TPDGCode
+static const int kFeedback=50000051; //??? go to something more general like TPDGCode
+
+class AliRICHChamber;
class AliRICHParam :public TObject
{
public:
- AliRICHParam() {;}
- virtual ~AliRICHParam() {;}
- static Int_t NpadsX() {return 144;}
- static Int_t NpadsY() {return 160;}
- static Int_t NpadsXsec() {return NpadsX()/3;}
- static Int_t NpadsYsec() {return NpadsY()/2;}
- static Double_t DeadZone() {return 2.6;}
- static Double_t PadSizeX() {return 0.84;}
- static Double_t PadSizeY() {return 0.8;}
- static Double_t SectorSizeX() {return NpadsX()*PadSizeX()/3;}
- static Double_t SectorSizeY() {return NpadsY()*PadSizeY()/2;}
- static Double_t PcSizeX() {return NpadsX()*PadSizeX()+2*DeadZone();}
- static Double_t PcSizeY() {return NpadsY()*PadSizeY()+DeadZone();}
- static Double_t WirePitch() {return PadSizeX()/2;}
- static Double_t SizeX() {return 132.6;}
- static Double_t SizeY() {return 26;}
- static Double_t SizeZ() {return 136.7;}
- static Double_t Offset() {return 490+1.267;}
- static Double_t AngleYZ() {return 19.5*TMath::DegToRad();}
- static Double_t AngleXY() {return 20*TMath::DegToRad();}
- static Double_t FreonThickness() {return 1.5;}
- static Double_t QuartzThickness() {return 0.5;}
- static Double_t GapThickness() {return 8.0;}
- static Double_t RadiatorToPads() {return FreonThickness()+QuartzThickness()+GapThickness();}
- static Double_t ProximityGapThickness() {return 0.4;}
- static Double_t AnodeCathodeGap() {return 0.2;}
- static Double_t QuartzLength() {return 133;}
- static Double_t QuartzWidth() {return 127.9;}
- static Double_t OuterFreonLength() {return 133;}
- static Double_t OuterFreonWidth() {return 41.3;}
- static Double_t InnerFreonLength() {return 133;}
- static Double_t InnerFreonWidth() {return 41.3;}
- static Double_t IonisationPotential() {return 26.0e-9;}
- static Double_t MathiensonDeltaX() {return 5*0.18;}
- static Double_t MathiensonDeltaY() {return 5*0.18;}
- static Int_t MaxQdc() {return 4095;}
- static Double_t QdcSlope(Int_t sec) {HV(sec);return 27;}
- static Double_t AlphaFeedback(Int_t sec) {HV(sec);return 0.036;}
+//ctor&dtor
+ AliRICHParam():TObject(),fpChambers(0) {CreateChambers();}
+ virtual ~AliRICHParam() {delete fpChambers;}
+//test methodes
+ void Print(const Option_t *opt=""); //print current parametrization
+ void Test() {TestSeg();TestTrans();TestResp();} //test all groups of methodes
+ void TestResp(); //test the response group of methodes
+ void TestSeg(); //test the segmentation group of methodes
+ void TestTrans(); //test the transform group of methodes
+ void DrawAxis();
+//flags staff
+ static void SetAerogel(Bool_t a) {fgIsAerogel=a;}
+ static Bool_t IsAerogel() {return fgIsAerogel;}
+ static void SetRadioSrc(Bool_t a) {fgIsRadioSrc=a;}
+ static Bool_t IsRadioSrc() {return fgIsRadioSrc;}
+ static void SetTestBeam(Bool_t a) {fgIsTestBeam=a;}
+ static Bool_t IsTestBeam() {return fgIsTestBeam;}
+ static void SetWireSag(Bool_t a) {fgIsWireSag=a;}
+ static Bool_t IsWireSag() {return fgIsWireSag;}
+ static void SetResolveClusters(Bool_t a) {fgIsResolveClusters=a;}
+ static Bool_t IsResolveClusters() {return fgIsResolveClusters;}
+//Chambers manipulation methodes
+ void CreateChambers(); //form chamber structure
+ AliRICHChamber* C(Int_t i) {return (AliRICHChamber*)fpChambers->UncheckedAt(i-1);} //returns pointer to chamber i
+ Int_t Nchambers() {return fpChambers->GetEntriesFast();} //returns number of chambers
+//Geometrical properties
+ static Int_t NpadsX() {return kNpadsX;} //pads along X in chamber
+ static Int_t NpadsY() {return kNpadsY;} //pads along Y in chamber
+ static Int_t NpadsXsec() {return NpadsX()/2;} //pads along X in sector
+ static Int_t NpadsYsec() {return NpadsY()/3;} //pads along Y in sector
+ static Double_t DeadZone() {return 2.6;} //dead zone size in cm
+ static Double_t PadSizeX() {return 0.8;} //pad size x, cm
+ static Double_t PadSizeY() {return 0.84;} //pad size y, cm
- static Bool_t IsWireSag() {return fgIsWireSag;}
- static Int_t HV(Int_t) {return fgHV;}
- static Double_t AngleRot() {return fgAngleRot*TMath::DegToRad();}
- static void SetWireSag(Bool_t status) {fgIsWireSag=status;}
- static void SetHV(Int_t hv) {fgHV =hv;}
- static void SetAngleRot(Double_t rot) {fgAngleRot =rot;}
-
- inline static Double_t Mathienson(Double_t lx1,Double_t lx2,Double_t ly1,Double_t ly2);
- inline static void Loc2Area(TVector3 hitX3,Int_t &padxMin,Int_t &padyMin,Int_t &padxMax,Int_t &padyMax);
- inline static Int_t PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]);
- inline static Int_t Loc2Pad(Double_t x,Double_t y,Int_t &padx,Int_t &pady);
- inline static void Pad2Loc(Int_t padx,Int_t pady,Double_t &x,Double_t &y);
- inline static Double_t GainVariation(Double_t y,Int_t sector);
- inline static Int_t Loc2TotQdc(TVector3 locX3,Double_t eloss,Int_t iPid, Int_t §or);
- inline static Double_t Loc2PadFrac(TVector3 locX3,Int_t padx,Int_t pady);
+ static Double_t SectorSizeX() {return NpadsX()*PadSizeX()/2;} //sector size x, cm
+ static Double_t SectorSizeY() {return NpadsY()*PadSizeY()/3;} //sector size y, cm
+ static Double_t PcSizeX() {return NpadsX()*PadSizeX()+DeadZone();} //PC size x, cm
+ static Double_t PcSizeY() {return NpadsY()*PadSizeY()+2*DeadZone();} //PC size y, cm
+//
+ static Double_t Zfreon() {return 1.5;} //freon thinkness, cm
+ static Double_t Zwin() {return 0.5;} //radiator quartz window, cm
+ static Double_t Pc2Win() {return 8.0;} //cm between CsI PC and radiator quartz window
+ static Double_t Pc2Coll() {return 7.0;} //cm between CsI PC and third wire grid (collection wires)
+ static Double_t Pc2Anod() {return 0.204;} //cm between CsI PC and first wire grid (anod wires)
+ static Double_t Pc2Cath() {return 0.445;} //cm between CsI PC and second wire grid (cathode wires)
+ static Double_t Freon2Pc() {return Zfreon()+Zwin()+Pc2Win();} //cm between CsI PC and entrance to freon
+ static Double_t PitchAnod() {return PadSizeY()/2;} //cm between anode wires
+ static Double_t PitchCath() {return PadSizeY()/4;} //cm between cathode wires
+ static Double_t PitchColl() {return 0.5;} //cm between collection wires
- void SigGenInit(Double_t,Double_t){;}
- Bool_t SigGenCond(Double_t,Double_t){return kFALSE;}
- inline static Int_t Loc2Sec(Double_t &x,Double_t &y);
- inline static Int_t Pad2Sec(Int_t &padx,Int_t &pady);
+ static Double_t IonisationPotential() {return 26.0e-9;} //for CH4 in GeV taken from ????
+ static TVector2 MathiesonDelta() {return TVector2(5*0.18,5*0.18);} //area of 5 sigmas of Mathieson distribution (cm)
+ static Int_t MaxQdc() {return 4095;} //QDC number of channels
-protected:
- static Bool_t fgIsWireSag; //is wire sagitta taken into account
- static Int_t fgHV; //HV applied to anod wires
- static Double_t fgAngleRot; //rotation of RICH from up postion (0,0,490)cm
+ static Int_t HV(Int_t sector) {
+ if (sector>=1 && sector <=6)
+ return fgHV[sector-1];
+ else {
+ return kBad;
+ }
+ } //high voltage for this sector
+ static void SetHV(Int_t sector,Int_t hv){fgHV[sector-1]=hv;}
+//optical properties methodes
+ static Float_t PhotonEnergy(Int_t i) {return 0.1*i+5.5;} //photon energy (eV) for i-th point
+ static Float_t AbsCH4(Float_t ev); //CH4 absorption length (cm) for photon with given energy (eV)
+ static Float_t AbsGel(Float_t) {return 500;} //Aerogel absorption length (cm) for photon with given energy (eV)
+ static Float_t RefIdxC6F14(Float_t eV) {return eV*0.0172+1.177;} //Freon ref index for photon with given energy (eV)
+ static Float_t RefIdxCH4(Float_t) {return 1.000444;} //Methane ref index for photon with given energy (eV)
+ static Float_t RefIdxSiO2(Float_t eV) {Float_t e1=10.666,e2=18.125,f1=46.411,f2= 228.71;
+ return TMath::Sqrt(1.+f1/(e1*e1-eV*eV)+f2/(e2*e2-eV*eV));}//Quartz window ref index from TDR p.35
+ static Float_t RefIdxGel(Float_t) {return 1.05;} //aerogel ref index
+ static Float_t DenGel() {return (RefIdxGel(0)-1)/0.21;} //aerogel density gr/cm^3 parametrization by E.Nappi
+//trasformation methodes
+ inline static TVector Loc2Area(const TVector2 &x2); //return area affected by hit x2
+ inline static Int_t Loc2Sec(const TVector2 &x2); //return sector for given position
+ inline static TVector Loc2Pad(const TVector2 &x2); //return pad containing given position
+ inline static TVector2 Pad2Loc(TVector pad); //return center of the pad
+ static TVector2 Pad2Loc(Int_t x,Int_t y) {TVector pad(2);pad[0]=x;pad[1]=y;return Pad2Loc(pad);}//return center of the pad (x,y)
+ inline static Int_t Pad2Sec(const TVector &pad); //return sector of given pad
+ inline static Int_t PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]); //number of neighbours for this pad
+ static Bool_t IsAccepted(const TVector2 &x2) {return ( x2.X()>=0 && x2.X()<=PcSizeX() && x2.Y()>=0 && x2.Y()<=PcSizeY() ) ? kTRUE:kFALSE;}
+//charge response methodes
+ inline static Double_t Mathieson(Double_t x1,Double_t x2,Double_t y1,Double_t y2); //Mathienson integral over given limits
+ inline static Double_t GainSag(Double_t x,Int_t sector); //gain variations in %
+ static Double_t QdcSlope(Int_t sec){switch(sec){case kBad: return 0; default: return 33;}} //weight of electon in QDC channels
+ static Double_t Gain(const TVector2 &x2){//gives chamber gain in terms of QDC channels for given point in local ref system
+ if(fgIsWireSag) return QdcSlope(Loc2Sec(x2))*(1+GainSag(x2.X(),Loc2Sec(x2))/100);
+ else return QdcSlope(Loc2Sec(x2));}
+ inline static Double_t FracQdc(const TVector2 &x2,const TVector &pad); //charge fraction to pad from hit
+ inline static Int_t TotQdc(TVector2 x2,Double_t eloss); //total charge for hit eloss=0 for photons
+ inline Bool_t IsOverTh(Int_t c,TVector pad,Double_t q); //is QDC of the pad registered by FEE
+ static Int_t NsigmaTh() {return fgNsigmaTh;} //
+ static Float_t SigmaThMean() {return fgSigmaThMean;} //QDC electronic noise mean
+ static Float_t SigmaThSpread() {return fgSigmaThSpread;} //QDC electronic noise width
+
+ inline static Double_t CogCorr(Double_t x) {return 3.31267e-2*TMath::Sin(2*TMath::Pi()/PadSizeX()*x) //correction of cluster CoG due to sinoidal
+ -2.66575e-3*TMath::Sin(4*TMath::Pi()/PadSizeX()*x)
+ +2.80553e-3*TMath::Sin(6*TMath::Pi()/PadSizeX()*x);}
- ClassDef(AliRICHParam,4) //RICH main parameters
+ static Bool_t fgIsAerogel; //aerogel geometry instead of normal RICH flag
+protected:
+ static Bool_t fgIsRadioSrc; //radioactive source instead of radiators flag
+ static Bool_t fgIsTestBeam; //test beam geometry instead of normal RICH flag
+ static Bool_t fgIsWireSag; //wire sagitta ON/OFF flag
+ static Bool_t fgIsResolveClusters; //declustering ON/OFF flag
+
+ TObjArray *fpChambers; //list of chambers
+ static Int_t fgHV[6]; //HV applied to anod wires
+ static Int_t fgNsigmaTh; //n. of sigmas to cut for zero suppression
+ static Float_t fgSigmaThMean; //sigma threshold value
+ static Float_t fgSigmaThSpread; //spread of sigma
+ ClassDef(AliRICHParam,5) //RICH main parameters class
};
//__________________________________________________________________________________________________
Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4])
{
+//Determines all the neighbouring pads for the given one (iPadX,iPadY). Returns total number of these pads.
+//Dead zones are taken into account, meaning pads from different sector are not taken.
+// 1
+// 2 3
+// 4
Int_t nPads=0;
- if(iPadY<NpadsY()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;}
- if(iPadX<NpadsX()){listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;}
- if(iPadY>1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;}
- if(iPadX>1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;}
+ if(iPadY!=NpadsY()&&iPadY!=2*NpadsYsec()&&iPadY!=NpadsYsec()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;} //1
+ if(iPadX!=1&&iPadX!=NpadsXsec()+1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;} //2
+ if(iPadX!=NpadsXsec()&&iPadX!=NpadsX()) {listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;} //3
+ if(iPadY!=1&&iPadY!=NpadsYsec()+1&&2*NpadsYsec()+1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;} //4
+
return nPads;
}//Pad2ClosePads()
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2Sec(Double_t &x,Double_t &y)
-{//Determines sector for a given hit (x,y) and trasform this point to the local system of that sector.
+Int_t AliRICHParam::Loc2Sec(const TVector2 &v2)
+{
+//Determines sector containing the given point.
+//Returns sector code:
+//y ^ 5 6
+// | 3 4
+// | 1 2
+// -------> x
+ Double_t x0=0; Double_t x1=SectorSizeX(); Double_t x2=SectorSizeX()+DeadZone(); Double_t x3=PcSizeX();
+ Double_t y0=0; Double_t y1=SectorSizeY(); Double_t y2=SectorSizeY()+DeadZone(); Double_t y3=2*SectorSizeY()+DeadZone();
+ Double_t y4=PcSizeY()-SectorSizeY(); Double_t y5=PcSizeY();
+
Int_t sector=kBad;
- Double_t x1=-PcSizeX()/2; Double_t x2=-SectorSizeX()/2-DeadZone(); Double_t x3=-SectorSizeX()/2;
- Double_t x4= SectorSizeX()/2; Double_t x5= SectorSizeX()/2+DeadZone(); Double_t x6= PcSizeX()/2;
-
- if (x>=x1&&x<=x2) {sector=1;x+=PcSizeX()/2;}
- else if(x>=x3&&x<=x4) {sector=2;x+=SectorSizeX()/2;}
- else if(x>=x5&&x<=x6) {sector=3;x-=SectorSizeX()/2+DeadZone();}
- else {return kBad;} //in dead zone
-
- if (y>=-PcSizeY()/2 &&y<=-DeadZone()/2) {y+=PcSizeY()/2; return -sector;}
- else if(y> -DeadZone()/2 &&y< DeadZone()/2) {return kBad;} //in dead zone
- else if(y>= DeadZone()/2 &&y<= PcSizeY()/2) {y-=DeadZone()/2; return sector;}
- else {return kBad;}
+ if (v2.X() >= x0 && v2.X() <= x1 ) sector=1;
+ else if(v2.X() >= x2 && v2.X() <= x3 ) sector=2;
+ else return kBad;
+
+ if (v2.Y() >= y0 && v2.Y() <= y1 ) ; //sectors 1 or 2
+ else if(v2.Y() >= y2 && v2.Y() <= y3 ) sector+=2; //sectors 3 or 4
+ else if(v2.Y() >= y4 && v2.Y() <= y5 ) sector+=4; //sectors 5 or 6
+ else return kBad;
+ return sector;
}//Loc2Sec(Double_t x, Double_t y)
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Pad2Sec(Int_t &padx, Int_t &pady)
-{//Determines sector for a given pad (padx,pady) and trasform this point to the local system of that sector.
+TVector AliRICHParam::Loc2Pad(const TVector2 &loc)
+{
+//Determines pad number TVector(padx,pady) containing the given point x2 defined in the chamber RS.
+//Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber.
+//y ^ 5 6
+// | 3 4
+// | 1 2
+// -------> x
+ TVector pad(2);
+ Int_t sec=Loc2Sec(loc);//trasforms x2 to sector reference system
+ if(sec==kBad) {pad[0]=pad[1]=kBad; return pad;}
+//first we deal with x
+ if(sec==1||sec==3||sec==5) pad[0]= Int_t( loc.X() / PadSizeX() )+1; //sector 1 or 3 or 5
+ else pad[0]=NpadsX() - Int_t( (PcSizeX()-loc.X()) / PadSizeX() ) ; //sector 2 or 4 or 6
+//second deal with y
+ if(sec==1||sec==2) pad[1]=Int_t( loc.Y() / PadSizeY() )+1; //sector 1 or 2
+ else if(sec==3||sec==4) pad[1]=Int_t( (loc.Y()-SectorSizeY()-DeadZone()) / PadSizeY() )+NpadsYsec(); //sector 3 or 4
+ else pad[1]=NpadsY() - Int_t( (PcSizeY()-loc.Y()) / PadSizeY() ); //sector 5 or 6
+ return pad;
+}
+//__________________________________________________________________________________________________
+Int_t AliRICHParam::Pad2Sec(const TVector &pad)
+{
+//Determines sector containing the given pad.
Int_t sector=kBad;
- if (padx>=1 &&padx<=NpadsXsec()) {sector=1;}
- else if(padx> NpadsXsec() &&padx<=NpadsXsec()*2) {sector=2;padx-=NpadsXsec();}
- else if(padx> NpadsXsec()*2&&padx<=NpadsX()) {sector=3;padx-=NpadsXsec()*2;}
- else {return kBad;}
+ if (pad[0] >= 1 && pad[0] <= NpadsXsec() ) {sector=1;}
+ else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX() ) {sector=2;}
+ else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
+
+ if (pad[1] >= 1 && pad[1] <= NpadsYsec() ) {}
+ else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec() ) {sector+=2;}
+ else if(pad[1] > 2*NpadsYsec() && pad[1] <= NpadsY() ) {sector+=4;}
+ else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
- if (pady>=1 &&pady<= NpadsYsec()) {return -sector;}
- else if(pady>NpadsYsec()&&pady<= NpadsY()) {pady-=NpadsYsec();return sector;}
- else {return kBad;}
+ return sector;
}//Pad2Sec()
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2Pad(Double_t x, Double_t y, Int_t &padx, Int_t &pady)
-{//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=Loc2Sec(x,y);
- if(sector==kBad) return sector;
-
- padx=Int_t(x/PadSizeX())+1;
- if(padx>NpadsXsec()) padx= NpadsXsec();
- if(sector==2||sector==-2) padx+=NpadsXsec();
- else if(sector==3||sector==-3) padx+=NpadsXsec()*2;
+TVector2 AliRICHParam::Pad2Loc(TVector pad)
+{
+//Returns position of the center of the given pad in local system of the chamber (cm)
+// y ^ 5 6
+// | 3 4 sector numbers
+// | 1 2
+// -------> x
+ Double_t x=kBad,y=kBad;
+ if(pad[0] > 0 && pad[0] <= NpadsXsec())//it's 1 or 3 or 5
+ x=(pad[0]-0.5)*PadSizeX();
+ else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX())//it's 2 or 4 or 6
+ x=(pad[0]-0.5)*PadSizeX()+DeadZone();
+ else
+ AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
- pady=Int_t(y/PadSizeY())+1;
- if(pady>NpadsYsec()) padx= NpadsYsec();
- if(sector>0) pady+=NpadsYsec();
-
- return sector;
-}//Loc2Pad()
+ if(pad[1] > 0 && pad[1] <= NpadsYsec())//it's 1 or 2
+ y=(pad[1]-0.5)*PadSizeY();
+ else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec())//it's 3 or 4
+ y=(pad[1]-0.5)*PadSizeY()+DeadZone();
+ else if(pad[1] > 2*NpadsYsec() && pad[1]<= NpadsY())//it's 5 or 6
+ y=(pad[1]-0.5)*PadSizeY()+2*DeadZone();
+ else
+ AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
+
+ return TVector2(x,y);
+}
//__________________________________________________________________________________________________
-void AliRICHParam::Pad2Loc(Int_t padx,Int_t pady,Double_t &x,Double_t &y)
+Double_t AliRICHParam::GainSag(Double_t x,Int_t sector)
{
- Int_t sector=Pad2Sec(padx,pady);
- if(sector>0)
- y=0.5*DeadZone()+pady*PadSizeY()-0.5*PadSizeY();
- else{
- sector=-sector;
- y=-0.5*PcSizeY()+pady*PadSizeY()-0.5*PadSizeY();
+//Returns % of gain variation due to wire sagita.
+//All curves are parametrized as per sector basis, so x must be apriory transformed to the Sector RS.
+//Here x is a distance along wires.
+ x-=SectorSizeX()/2;
+ if(x>SectorSizeX()) x-=SectorSizeX();
+ switch(HV(sector)){
+ case 2150: return 9e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0316*TMath::Power(x,2)-3e-4*x+25.367;//%
+ case 2100: return 8e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0283*TMath::Power(x,2)-2e-4*x+23.015;
+ case 2050: return 7e-6*TMath::Power(x,4)+1e-7*TMath::Power(x,3)-0.0254*TMath::Power(x,2)-2e-4*x+20.888;
+ case 2000: return 6e-6*TMath::Power(x,4)+8e-8*TMath::Power(x,3)-0.0227*TMath::Power(x,2)-1e-4*x+18.961;
+ default: return 0;
}
- if(sector==1)
- x=-0.5*PcSizeX()+padx*PadSizeX()-0.5*PadSizeX();
- else if(sector==2)
- x=-0.5*SectorSizeX()+padx*PadSizeX()-0.5*PadSizeX();
- else
- x= 0.5*SectorSizeX()+DeadZone()+padx*PadSizeX()-0.5*PadSizeX();
- return;
-}//Pad2Loc()
+}
//__________________________________________________________________________________________________
-Double_t AliRICHParam::GainVariation(Double_t y,Int_t sector)
+Int_t AliRICHParam::TotQdc(TVector2 x2,Double_t eloss)
{
- if(IsWireSag()){
- if(y>0) y-=SectorSizeY()/2; else y+=SectorSizeY()/2;
- switch(HV(sector)){
- case 2150:
- default:
- return 9e-6*TMath::Power(y,4)+2e-7*TMath::Power(y,3)-0.0316*TMath::Power(y,2)-3e-4*y+25.367;//%
- }
- }else
- return 0;
+//Calculates the total charge produced by the eloss in point x2 (Chamber RS).
+//Returns this change parametrised in QDC channels, or 0 if the hit in the dead zone.
+//eloss=0 means photon which produces 1 electron only eloss > 0 for Mip
+ if(Loc2Sec(x2)==kBad) return 0; //hit in the dead zone
+ Int_t iNelectrons=Int_t(eloss/IonisationPotential()); if(iNelectrons==0) iNelectrons=1;
+ Double_t qdc=0;
+ for(Int_t i=1;i<=iNelectrons;i++) qdc+=-Gain(x2)*TMath::Log(gRandom->Rndm());
+ return Int_t(qdc);
}
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2TotQdc(TVector3 x3,Double_t eloss,Int_t iPid,Int_t §or)
-{//calculates the total charge produced by the hit given in local refenrence system
- Double_t x=x3.X(),y=x3.Y();
-
- sector=Loc2Sec(x,y);
-
- Double_t gain=QdcSlope(sector)*(1+GainVariation(x3.Y(),sector)/100);
-
-
- if(iPid>50000){//it's photon => 1 electron
- return Int_t(gain*-TMath::Log(gRandom->Rndm()));
- }else{//it's MIP
- Int_t iNelectrons=Int_t(eloss/IonisationPotential());
- if(iNelectrons==0) return 0;
- Double_t qdc=0;
- for(Int_t i=1;i<=iNelectrons;i++) qdc+=gain*-TMath::Log(gRandom->Rndm());
- return Int_t(qdc);
- }
+Double_t AliRICHParam::FracQdc(const TVector2 &x2,const TVector &pad)
+{
+//Calculates the charge fraction induced to given pad by the hit from the given point.
+//Integrated Mathieson distribution is used.
+ TVector2 center2=Pad2Loc(pad);//gives center of requested pad
+ Double_t normXmin=(x2.X()-center2.X()-PadSizeX()/2) /Pc2Cath();//parametrise for Mathienson
+ Double_t normXmax=(x2.X()-center2.X()+PadSizeX()/2) /Pc2Cath();
+ Double_t normYmin=(x2.Y()-center2.Y()-PadSizeY()/2) /Pc2Cath();
+ Double_t normYmax=(x2.Y()-center2.Y()+PadSizeY()/2) /Pc2Cath();
+
+//requested pad might not belong to the sector of the given hit position, hence the check:
+ return (Loc2Sec(x2)!=Pad2Sec(pad)) ? 0:Mathieson(normXmin, normYmin, normXmax, normYmax);
}
//__________________________________________________________________________________________________
-Double_t AliRICHParam::Loc2PadFrac(TVector3 hitX3,Int_t padx,Int_t pady)
-{//
- Double_t padXcenter=0,padYcenter=0; Pad2Loc(padx,pady,padXcenter,padYcenter);
-
- //correction to the position of the nearest wire
-
- Double_t normXmin=(hitX3.X()-padXcenter-PadSizeX()/2) /AnodeCathodeGap();
- Double_t normXmax=(hitX3.X()-padXcenter+PadSizeX()/2) /AnodeCathodeGap();
- Double_t normYmin=(hitX3.Y()-padYcenter-PadSizeY()/2) /AnodeCathodeGap();
- Double_t normYmax=(hitX3.Y()-padYcenter+PadSizeY()/2) /AnodeCathodeGap();
-
- return Mathienson(normXmin,normYmin,normXmax,normYmax);
-}//Loc2PadQdc()
-//__________________________________________________________________________________________________
-Double_t AliRICHParam::Mathienson(Double_t xMin,Double_t yMin,Double_t xMax,Double_t yMax)
-{//see NIM A370(1988)602-603
- const Double_t SqrtKx3=0.77459667;const Double_t Kx2=0.962;const Double_t Kx4=0.379;
- const Double_t SqrtKy3=0.77459667;const Double_t Ky2=0.962;const Double_t Ky4=0.379;
+Double_t AliRICHParam::Mathieson(Double_t xMin,Double_t yMin,Double_t xMax,Double_t yMax)
+{
+//All arguments are parametrised according to NIM A370(1988)602-603
+//Returns a charge fraction.
+ const Double_t kSqrtKx3=0.77459667;const Double_t kX2=0.962;const Double_t kX4=0.379;
+ const Double_t kSqrtKy3=0.77459667;const Double_t kY2=0.962;const Double_t kY4=0.379;
- Double_t ux1=SqrtKx3*TMath::TanH(Kx2*xMin);
- Double_t ux2=SqrtKx3*TMath::TanH(Kx2*xMax);
- Double_t uy1=SqrtKy3*TMath::TanH(Ky2*yMin);
- Double_t uy2=SqrtKy3*TMath::TanH(Ky2*yMax);
- return 4*Kx4*(TMath::ATan(ux2)-TMath::ATan(ux1))*Ky4*(TMath::ATan(uy2)-TMath::ATan(uy1));
+ Double_t ux1=kSqrtKx3*TMath::TanH(kX2*xMin);
+ Double_t ux2=kSqrtKx3*TMath::TanH(kX2*xMax);
+ Double_t uy1=kSqrtKy3*TMath::TanH(kY2*yMin);
+ Double_t uy2=kSqrtKy3*TMath::TanH(kY2*yMax);
+ return 4*kX4*(TMath::ATan(ux2)-TMath::ATan(ux1))*kY4*(TMath::ATan(uy2)-TMath::ATan(uy1));
}
//__________________________________________________________________________________________________
-void AliRICHParam::Loc2Area(TVector3 hitX3,Int_t &iPadXmin,Int_t &iPadYmin,Int_t &iPadXmax,Int_t &iPadYmax)
-{//calculates the area of disintegration for a given hit. Area is a rectangulare set pf pads
- //defined by its left-down and right-up coners
- // hitX3.SetX(Shift2NearestWire(hitX3.X());
- Loc2Pad(hitX3.X()-MathiensonDeltaX(),hitX3.Y()-MathiensonDeltaY(),iPadXmin,iPadYmin);
- Loc2Pad(hitX3.X()+MathiensonDeltaX(),hitX3.Y()+MathiensonDeltaY(),iPadXmax,iPadYmax);
-}//
+TVector AliRICHParam::Loc2Area(const TVector2 &x2)
+{
+//Calculates the area of disintegration for a given point. It's assumed here that this points lays on anode wire.
+//Area is a rectangulare set of pads defined by its left-down and right-up coners.
+ TVector area(4);
+ TVector pad=Loc2Pad(x2);
+ area[0]=area[2]=pad[0]; area[1]=area[3]=pad[1];//area is just a pad fired
+ if(pad[0]!=1 && pad[0]!= NpadsXsec()+1 ) area[0]--; //left down coner X
+ if(pad[1]!=1 && pad[1]!= NpadsYsec()+1 && pad[1]!= 2*NpadsYsec()+1) area[1]--; //left down coner Y
+ if(pad[0]!=NpadsXsec() && pad[0]!= NpadsX() ) area[2]++; //right up coner X
+ if(pad[1]!=NpadsYsec() && pad[1]!= 2*NpadsYsec() && pad[1]!= NpadsY() ) area[3]++; //right up coner Y
+ return area;
+}
+//__________________________________________________________________________________________________
+Bool_t AliRICHParam::IsOverTh(Int_t ,TVector ,Double_t q)
+{
+//Checks if the current q is over threshold and FEE will save this value to data concentrator.
+ return (q>NsigmaTh()*(SigmaThMean()+(1.-2*gRandom->Rndm())*SigmaThSpread()));
+}
#endif //AliRICHParam_h
+
+
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