#ifndef AliRICHParam_h #define AliRICHParam_h #include "AliRICHConst.h" #include #include #include #include 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;} 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 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); 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); 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 ClassDef(AliRICHParam,4) //RICH main parameters }; //__________________________________________________________________________________________________ Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4]) { Int_t nPads=0; if(iPadY1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;} if(iPadX>1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;} 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 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) //__________________________________________________________________________________________________ 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::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 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() //__________________________________________________________________________________________________ Double_t AliRICHParam::GainVariation(Double_t y,Int_t sector) { 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; } //__________________________________________________________________________________________________ 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 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 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)); } //__________________________________________________________________________________________________ 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); }// #endif //AliRICHParam_h