Float_t LorsY ( )const{return AliHMPIDParam::LorsY(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2Y(fPad)); } //center of the pad y, [cm]
//
- inline Float_t Mathieson (Float_t x )const; //Mathieson distribution
- inline Float_t IntPartMathi(Float_t z, Int_t axis )const; //integral in 1-dim of Mathieson
- inline Float_t IntMathieson(Float_t x,Float_t y )const; //integral in 2-dim of Mathieson
+ inline Double_t MathiesonX (Double_t x )const; //Mathieson distribution along wires X
+ inline Double_t MathiesonY (Double_t x )const; //Mathieson distribution perp to wires Y
+ inline Double_t IntPartMathiX(Double_t z )const; //integral in 1-dim of Mathieson X
+ inline Double_t IntPartMathiY(Double_t z )const; //integral in 1-dim of Mathieson Y
+ inline Double_t IntMathieson (Double_t x,Double_t y )const; //integral in 2-dim of Mathieson
Int_t PadPcX ( )const{return AliHMPIDParam::A2X(fPad);} //pad pc x # 0..79
Int_t PadPcY ( )const{return AliHMPIDParam::A2Y(fPad);} //pad pc y # 0..47
Int_t PadChX ( )const{return (Pc()%2)*AliHMPIDParam::kPadPcX+PadPcX();} //pad ch x # 0..159
Float_t Q ( )const{return fQ;} //charge, [QDC]
inline void Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const;
inline Bool_t Set (Int_t c,Int_t p,Int_t x,Int_t y,Int_t tid=0); //manual creation
- void SetQ (Float_t q ) {fQ=q;if(fQ>4095)fQ=4095;} //manual creation
-
+ void SetQ (Float_t q ) {fQ=q;if(fQ>4095)fQ=4095;} //setter for charge
+ void SetPad (Int_t pad ) {fPad=pad;} //setter for pad
protected: //AliDigit has fTracks[3]
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Float_t AliHMPIDDigit::Mathieson(Float_t x)const
+Double_t AliHMPIDDigit::MathiesonX(Double_t x)const
+{
+// Mathieson function.
+// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
+// Arguments: x- position of the center of Mathieson distribution
+// Returns: value of the Mathieson function
+
+ Double_t lambda = x/AliHMPIDParam::PitchAnodeCathode();
+ Double_t tanh = TMath::TanH(AliHMPIDParam::K2x()*lambda);
+ Double_t a=1-tanh*tanh;
+ Double_t b=1+AliHMPIDParam::SqrtK3x()*AliHMPIDParam::SqrtK3x()*tanh*tanh;
+ Double_t mathi = AliHMPIDParam::K1x()*a/b;
+ return mathi;
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+Double_t AliHMPIDDigit::MathiesonY(Double_t y)const
{
// Mathieson function.
// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
// Arguments: x- position of the center of Mathieson distribution
// Returns: value of the Mathieson function
- Float_t kK1=0.28278795,kK2=0.96242952, kSqrtK3 =0.77459667, kD=0.445;
- Float_t lambda = x/kD;
- Float_t a=1-TMath::TanH(kK2*lambda)*TMath::TanH(kK2*lambda);
- Float_t b=1+kSqrtK3*kSqrtK3*TMath::TanH(kK2*lambda)*TMath::TanH(kK2*lambda);
- Float_t mathi = kK1*a/b;
+
+ Double_t lambda = y/AliHMPIDParam::PitchAnodeCathode();
+ Double_t tanh = TMath::TanH(AliHMPIDParam::K2y()*lambda);
+ Double_t a=1-tanh*tanh;
+ Double_t b=1+AliHMPIDParam::SqrtK3y()*AliHMPIDParam::SqrtK3y()*tanh*tanh;
+ Double_t mathi = AliHMPIDParam::K1y()*a/b;
return mathi;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Float_t AliHMPIDDigit::IntPartMathi(Float_t z, Int_t axis)const
+Double_t AliHMPIDDigit::IntPartMathiX(Double_t x)const
{
// Integration of Mathieson.
// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
// Arguments: x,y- position of the center of Mathieson distribution
// Returns: a charge fraction [0-1] imposed into the pad
- Float_t shift1,shift2;
- if(axis==1) {
- shift1 = -LorsX()+0.5*AliHMPIDParam::SizePadX();
- shift2 = -LorsX()-0.5*AliHMPIDParam::SizePadX();
- } else {
- shift1 = -LorsY()+0.5*AliHMPIDParam::SizePadY();
- shift2 = -LorsY()-0.5*AliHMPIDParam::SizePadY();
- }
+ Double_t shift1 = -LorsX()+0.5*AliHMPIDParam::SizePadX();
+ Double_t shift2 = -LorsX()-0.5*AliHMPIDParam::SizePadX();
- Float_t kK2=0.96242952, kSqrtK3 =0.77459667, kK4=0.37932926, kD=0.445;
+ Double_t ux1=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift1)/AliHMPIDParam::PitchAnodeCathode());
+ Double_t ux2=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift2)/AliHMPIDParam::PitchAnodeCathode());
+
+ return AliHMPIDParam::K4x()*(TMath::ATan(ux2)-TMath::ATan(ux1));
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- Float_t ux1=kSqrtK3*TMath::TanH(kK2*(z+shift1)/kD);
- Float_t ux2=kSqrtK3*TMath::TanH(kK2*(z+shift2)/kD);
+Double_t AliHMPIDDigit::IntPartMathiY(Double_t y)const
+{
+// Integration of Mathieson.
+// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
+// Arguments: x,y- position of the center of Mathieson distribution
+// Returns: a charge fraction [0-1] imposed into the pad
+ Double_t shift1 = -LorsY()+0.5*AliHMPIDParam::SizePadY();
+ Double_t shift2 = -LorsY()-0.5*AliHMPIDParam::SizePadY();
+
+ Double_t uy1=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift1)/AliHMPIDParam::PitchAnodeCathode());
+ Double_t uy2=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift2)/AliHMPIDParam::PitchAnodeCathode());
+
+ return AliHMPIDParam::K4y()*(TMath::ATan(uy2)-TMath::ATan(uy1));
- return kK4*(TMath::ATan(ux2)-TMath::ATan(ux1));
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Float_t AliHMPIDDigit::IntMathieson(Float_t x,Float_t y)const
+Double_t AliHMPIDDigit::IntMathieson(Double_t x,Double_t y)const
{
// Integration of Mathieson.
// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
// Arguments: x,y- position of the center of Mathieson distribution
// Returns: a charge fraction [0-1] imposed into the pad
- Float_t xm = IntPartMathi(x,1);
- Float_t ym = IntPartMathi(y,2);
+ Double_t xm = IntPartMathiX(x);
+ Double_t ym = IntPartMathiY(y);
return 4*xm*ym;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff