#define AliRICHParam_h
#include <TObject.h>
-#include "AliRICHConst.h"
+#include <TMath.h>
+#include <TVector3.h>
+#include <TRandom.h>
+
+
+static const int kNCH=7; //number of RICH chambers
+static const int kNpadsX = 144; //number of pads along X in single chamber
+static const int kNpadsY = 160; //number of pads along Y in single chamber
+static const int kBad=-101; //useful static const to mark initial (uninitalised) values
+
+
+static const int kadc_satm = 4096; //dynamic range (10 bits)
+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 AliRICHParam :public TObject
{
public:
- AliRICHParam();
- virtual ~AliRICHParam() {;}
+ AliRICHParam() {;}
+ virtual ~AliRICHParam() {;}
+ static const Int_t NpadsX() {return kNpadsX;}
+ static const Int_t NpadsY() {return kNpadsY;}
+ 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 MathiesonDeltaX() {return 5*0.18;}
+ static Double_t MathiesonDeltaY() {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;}
- void Recalc(); //Recalculates dependent parameters after changes applied
- Int_t Sector(Float_t &x,Float_t &y)const; //Returns sector number for given point (x,y)
- Int_t L2P(Float_t x,Float_t y,Int_t &padx,Int_t &pady)const;//Which pad contains point (x,y), returns sector code
- inline Int_t L2Px(Float_t x,Float_t y)const; //Which pad contains point (x,y), returns padx
- inline Int_t L2Py(Float_t x,Float_t y)const; //Which pad contains point (x,y), returns padx
- inline Int_t Wire(Float_t x)const; //Returns wire number for local point (x,y)
- inline void SigGenInit(Float_t x,Float_t y);
- inline Bool_t SigGenCond(Float_t x,Float_t y);
- Float_t Gain(Float_t y); //Returns total charge induced by single photon
- Float_t TotalCharge(Int_t iPID,Float_t eloss,Float_t y); //Returns total charge induced by particle lost eloss GeV
- Float_t PadCharge(Int_t /* iPadX */,Int_t /* iPadY */) {return 0;} //Returns charge for a given pad
- void FirstPad(Float_t x,Float_t y);
-
- void Segmentation(Int_t Nx,Int_t Ny) {fNpadsX=Nx;fNpadsY=Ny;Recalc();}
- Int_t NpadsX() const{return fNpadsX;}
- Int_t NpadsY() const{return fNpadsY;}
- void DeadZone(Float_t a) { fDeadZone=a;Recalc();}
- Float_t DeadZone() const{return fDeadZone;}
- void PadSize(Float_t x,Float_t y) { fPadSizeX=x;fPadSizeY=y;Recalc();}
- Float_t PadSizeX() const{return fPadSizeX;}
- Float_t PadSizeY() const{return fPadSizeY;}
- Float_t SectorSizeX() const{return fSectorSizeX;}
- Float_t SectorSizeY() const{return fSectorSizeY;}
- Float_t PcSizeX() const{return fPcSizeX;}
- Float_t PcSizeY() const{return fPcSizeY;}
-
- void Size(Float_t x,Float_t y,Float_t z){fSizeX=x;fSizeY=y;fSizeZ=z;}
- void GeantSize(Float_t *pArr) const{pArr[0]=fSizeX/2;pArr[1]=fSizeY/2;pArr[2]=fSizeZ/2;}
- Float_t SizeX() const{return fSizeX;}
- Float_t SizeY() const{return fSizeY;}
- Float_t SizeZ() const{return fSizeZ;}
- void Offset(Float_t offset) { fOffset=offset;}
- Float_t Offset() const{return fOffset;}
- void Angles(Float_t xy,Float_t yz) { fAngleXY=xy;fAngleYZ=yz;}
- Float_t AngleYZ() const{return fAngleYZ*kD2r;}
- Float_t AngleXY() const{return fAngleXY*kD2r;}
- void AngleRot(Float_t angle) { fAngleRot=angle;}
- Float_t AngleRot() const{return fAngleRot*kD2r;}
- void GapThickness(Float_t a) { fGapThickness=a;}
- Float_t GapThickness() const{return fGapThickness;}
- void ProximityGapThickness(Float_t a) { fProximityGapThickness=a;}
- Float_t ProximityGapThickness() const{return fProximityGapThickness;}
- void QuartzLength(Float_t a) { fQuartzLength=a;}
- Float_t QuartzLength() const{return fQuartzLength;}
- void QuartzWidth(Float_t a) { fQuartzWidth=a;}
- Float_t QuartzWidth() const{return fQuartzWidth;}
- void QuartzThickness(Float_t a) { fQuartzThickness=a;}
- Float_t QuartzThickness() const{return fQuartzThickness;}
- void OuterFreonLength(Float_t a) { fOuterFreonLength=a;}
- Float_t OuterFreonLength() const{return fOuterFreonLength;}
- void OuterFreonWidth(Float_t a) { fOuterFreonWidth=a;}
- Float_t OuterFreonWidth() const{return fOuterFreonWidth;}
- void InnerFreonLength(Float_t a) { fInnerFreonLength=a;}
- Float_t InnerFreonLength() const{return fInnerFreonLength;}
- void InnerFreonWidth(Float_t a) { fInnerFreonWidth=a;}
- Float_t InnerFreonWidth() const{return fInnerFreonWidth;}
- void FreonThickness(Float_t a) { fFreonThickness=a;}
- Float_t FreonThickness() const{return fFreonThickness;}
- void RadiatorToPads(Float_t a) { fRadiatorToPads=a;}
- Float_t RadiatorToPads() const{return fRadiatorToPads;}
-
- void SigmaIntegration(Float_t a) { fSigmaIntegration=a;}
- Float_t SigmaIntegration() const{return fSigmaIntegration;}
- void ChargeSpreadX(Float_t a) { fChargeSpreadX=a;}
- Float_t ChargeSpreadX() const{return fChargeSpreadX;}
- void ChargeSpreadY(Float_t a) { fChargeSpreadY=a;}
- Float_t ChargeSpreadY() const{return fChargeSpreadY;}
- Float_t AreaX() const{return fSigmaIntegration*fChargeSpreadX;}
- Float_t AreaY() const{return fSigmaIntegration*fChargeSpreadY;}
- void ChargeSlope(Float_t a) { fChargeSlope=a;}
- Float_t ChargeSlope() {return fChargeSlope;}
- void MaxAdc(Int_t a) { fMaxAdc=a;}
- Int_t MaxAdc() const{return fMaxAdc;}
- void Pitch(Float_t a) { fPitch=a;}
- Float_t Pitch() const{return fPitch;}
- void AlphaFeedback(Float_t a) { fAlphaFeedback=a;}
- Float_t AlphaFeedback() const{return fAlphaFeedback;}
- void EIonisation(Float_t a) { fEIonisation=a;}
- Float_t EIonisation() const{return fEIonisation;}
- void SqrtKx3(Float_t a) { fSqrtKx3=a;};
- void Kx2(Float_t a) { fKx2=a;}
- void Kx4(Float_t a) { fKx4=a;}
- void SqrtKy3(Float_t a) { fSqrtKy3=a;}
- void Ky2(Float_t a) { fKy2=a;}
- void Ky4(Float_t a) { fKy4=a;}
- void WireSag(Int_t a) { fWireSag=a;}
- void Voltage(Int_t a) { fVoltage=a;}
- Float_t Voltage() const{return fVoltage;}
-protected:
- Int_t fNpadsX; Int_t fNpadsY; //number of pads along X-Y in whole chamber (6 sectors)
- Int_t fNpadsXsector; Int_t fNpadsYsector; //number of pads along X-Y in one sector
- Float_t fDeadZone; //space between PC sectors, cm
- Float_t fPadSizeX,fPadSizeY; //pad size, cm
- Float_t fSectorSizeX,fSectorSizeY; //photocathod sector size, cm
- Float_t fWirePitch; //
-
- Int_t fCurrentPadX,fCurrentPadY; //???
- Int_t fCurrentWire; //???
-
- Float_t fSizeX; Float_t fSizeY; Float_t fSizeZ; //chamber outer size, cm
- Float_t fAngleRot; //azimuthal rotation XY plane, deg
- Float_t fAngleYZ; //angle between chambers YZ plane, deg
- Float_t fAngleXY; //angle between chambers XY plane, deg
- Float_t fOffset; //chambers offset from IP, cm
- Float_t fGapThickness; //gap thickness, cm
- Float_t fProximityGapThickness; //proximity gap thickness, cm
- Float_t fQuartzLength; Float_t fQuartzWidth; Float_t fQuartzThickness; //quartz window size, cm
- Float_t fOuterFreonLength; Float_t fOuterFreonWidth; //freon box outer size, cm
- Float_t fInnerFreonLength; Float_t fInnerFreonWidth; //freon box inner size, cm
- Float_t fFreonThickness; //freon thickness
- Float_t fRadiatorToPads; //distance from radiator to pads, cm
- Float_t fPcSizeX,fPcSizeY; //photocathod active area size,cm
+ static Bool_t IsResolveClusters() {return fgIsResolveClusters;}
+ static Bool_t IsWireSag() {return fgIsWireSag;}
+ static Int_t HV(Int_t) {return fgHV;}
+ static Double_t AngleRot() {return fgAngleRot*TMath::DegToRad();}
+ static void SetResolveClusters(Bool_t a){fgIsResolveClusters=a;}
+ 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 Mathieson(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);
- Float_t fChargeSlope; //Slope of the charge distribution
- Float_t fChargeSpreadX; //Width of the charge distribution in x
- Float_t fChargeSpreadY; //Width of the charge distribution in y
- Float_t fSigmaIntegration; //Number of sigma's used for charge distribution
- Float_t fAlphaFeedback; //Feedback photons coefficient
- Float_t fEIonisation; //Mean ionisation energy
- Int_t fMaxAdc; //Maximum ADC channel
- Float_t fSqrtKx3; //Mathieson parameters for x
- Float_t fKx2; //Mathieson parameters for x
- Float_t fKx4; //Mathieson parameters for x
- Float_t fSqrtKy3; //Mathieson parameters for y
- Float_t fKy2; //Mathieson parameters for y
- Float_t fKy4; //Mathieson parameters for y
- Float_t fPitch; //Anode-cathode pitch
- Int_t fWireSag; //Flag to turn on/off (0/1) wire sag
- Int_t fVoltage; //Working voltage (2000, 2050, 2100, 2150)
-
- ClassDef(AliRICHParam,1) //RICH main parameters
+ inline static Int_t Loc2Sec(Double_t &x,Double_t &y);
+ inline static Int_t Pad2Sec(Int_t &padx,Int_t &pady);
+ static Int_t Sector(Int_t padx,Int_t pady) {return Pad2Sec(padx,pady);}
+ inline Bool_t IsOverTh(Int_t iChamber, Int_t x, Int_t y, Double_t q);
+ static Int_t NsigmaTh() {return fgNsigmaTh;}
+ static Float_t SigmaThMean() {return fgSigmaThMean;}
+ static Float_t SigmaThSpread() {return fgSigmaThSpread;}
+ void GenSigmaThMap();
+protected:
+ static Bool_t fgIsWireSag; //is wire sagitta taken into account
+ static Bool_t fgIsResolveClusters; //performs declustering or not
+ static Int_t fgHV; //HV applied to anod wires
+ static Double_t fgAngleRot; //rotation of RICH from up postion (0,0,490)cm
+ static Float_t fSigmaThMap[kNCH][kNpadsX][kNpadsY]; // sigma of the pedestal distributions for all pads
+ 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,4) //RICH main parameters
};
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Wire(Float_t x)const
+Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4])
{
- Int_t iWire=(x>0)?Int_t(x/fWirePitch)+1:Int_t(x/fWirePitch)-1;
- return iWire;
-}//Int_t AliRICHParam::Wire(Float_t x, Float_t y)
+ Int_t nPads=0;
+ if(iPadY!=NpadsY()&&iPadY!=NpadsYsec()) {listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;}
+ if(iPadX!=NpadsXsec()&&iPadX!=2*NpadsXsec()&&iPadX!=NpadsX()){listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;}
+ if(iPadY!=1&&iPadY!=NpadsYsec()+1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;}
+ if(iPadX!=1&&iPadX!=NpadsXsec()+1&&iPadX!=2*NpadsXsec()+1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;}
+
+ return nPads;
+}//Pad2ClosePads()
//__________________________________________________________________________________________________
-void AliRICHParam::SigGenInit(Float_t x,Float_t y)
-{//Initialises pad and wire position during stepping
- L2P(x,y,fCurrentPadX,fCurrentPadY);
- fCurrentWire= (x>0) ? Int_t(x/fWirePitch)+1 : Int_t(x/fWirePitch)-1 ;
-}
+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 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+3;}
+ else {return kBad;}
+}//Loc2Sec(Double_t x, Double_t y)
//__________________________________________________________________________________________________
-Bool_t AliRICHParam::SigGenCond(Float_t x,Float_t y)
-{//Signal will be generated if particle crosses pad boundary or boundary between two wires.
- Int_t curPadX,curPadY;
- L2P(x,y,curPadX,curPadY);
- Int_t currentWire=(x>0) ? Int_t(x/fWirePitch)+1 : Int_t(x/fWirePitch)-1;
- if((curPadX != fCurrentPadX) || (curPadY != fCurrentPadY) || (currentWire!=fCurrentWire))
- return kTRUE;
- else
- return kFALSE;
-}//Bool_t AliRICHParam::SigGenCond(Float_t x,Float_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.
+ 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 (pady>=1 &&pady<= NpadsYsec()) {return sector;}
+ else if(pady>NpadsYsec()&&pady<= NpadsY()) {pady-=NpadsYsec();return sector+3;}
+ else {return kBad;}
+}//Pad2Sec()
//__________________________________________________________________________________________________
-Int_t AliRICHParam::L2Px(Float_t x,Float_t y)const
+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==5) padx+=NpadsXsec();
+ else if(sector==3||sector==6) padx+=NpadsXsec()*2;
+
+ pady=Int_t(y/PadSizeY())+1;
+ if(pady>NpadsYsec()) padx= NpadsYsec();
+ if(sector>0) pady+=NpadsYsec();
+
+ return sector;
+}//Loc2Pad()
+//__________________________________________________________________________________________________
+void AliRICHParam::Pad2Loc(Int_t padx,Int_t pady,Double_t &x,Double_t &y)
{
- Int_t padx,pady;
- L2P(x,y,padx,pady);
- return padx;
-}//Int_t AliRICHParam::L2Px(Float_t x,Float_t y)
+ Int_t sector=Pad2Sec(padx,pady);
+ if(sector>3)
+ y=0.5*DeadZone()+pady*PadSizeY()-0.5*PadSizeY();
+ else{
+ y=-0.5*PcSizeY()+pady*PadSizeY()-0.5*PadSizeY();
+ }
+ if(sector==1||sector==4)
+ x=-0.5*PcSizeX()+padx*PadSizeX()-0.5*PadSizeX();
+ else if(sector==2||sector==5)
+ x=-0.5*SectorSizeX()+padx*PadSizeX()-0.5*PadSizeX();
+ else
+ x= 0.5*SectorSizeX()+DeadZone()+padx*PadSizeX()-0.5*PadSizeX();
+ return;
+}//Pad2Loc()
//__________________________________________________________________________________________________
-Int_t AliRICHParam::L2Py(Float_t x,Float_t y)const
+Double_t AliRICHParam::GainVariation(Double_t y,Int_t sector)
{
- Int_t padx,pady;
- L2P(x,y,padx,pady);
- return pady;
-}//Int_t AliRICHParam::L2Px(Float_t x,Float_t y)
+//returns % of gain degradation due to wire sagita
+ if(IsWireSag()){
+ if(y>0) y-=SectorSizeY()/2; else y+=SectorSizeY()/2;
+ switch(HV(sector)){
+ case 2150: return 9e-6*TMath::Power(y,4)+2e-7*TMath::Power(y,3)-0.0316*TMath::Power(y,2)-3e-4*y+25.367;//%
+ case 2100: return 8e-6*TMath::Power(y,4)+2e-7*TMath::Power(y,3)-0.0283*TMath::Power(y,2)-2e-4*y+23.015;
+ case 2050: return 7e-6*TMath::Power(y,4)+1e-7*TMath::Power(y,3)-0.0254*TMath::Power(y,2)-2e-4*y+20.888;
+ case 2000: return 6e-6*TMath::Power(y,4)+8e-8*TMath::Power(y,3)-0.0227*TMath::Power(y,2)-1e-4*y+18.961;
+ default: return 0;
+ }
+ }else
+ return 0;
+}
+//__________________________________________________________________________________________________
+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::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 Mathieson(normXmin,normYmin,normXmax,normYmax);
+}//Loc2PadQdc()
+//__________________________________________________________________________________________________
+Double_t AliRICHParam::Mathieson(Double_t xMin,Double_t yMin,Double_t xMax,Double_t yMax)
+{//see NIM A370(1988)602-603
+ 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=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()-MathiesonDeltaX(),hitX3.Y()-MathiesonDeltaY(),iPadXmin,iPadYmin);
+ Loc2Pad(hitX3.X()+MathiesonDeltaX(),hitX3.Y()+MathiesonDeltaY(),iPadXmax,iPadYmax);
+}//
//__________________________________________________________________________________________________
+Bool_t AliRICHParam::IsOverTh(Int_t iChamber, Int_t x, Int_t y, Double_t q)
+{// Calculate the new charge subtracting pedestal and if the current digit is over threshold
+ if(q>NsigmaTh()*fSigmaThMap[iChamber-1][x-1][y-1]) return kTRUE; else return kFALSE;
+}//
#endif //AliRICHParam_h
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff