void AliEMCALGeometry::Init(void){
// Initializes the EMCAL parameters
+ fgInit = kFALSE; // Assume failer untill proven otherwise.
if(!( (strcmp( fName, "EMCALArch1a" ) == 0) |
(strcmp( fName, "EMCALArch1b" ) == 0) |
(strcmp( fName, "EMCALArch2a" ) == 0) |
(strcmp( fName, "EMCALArch2b" ) == 0) )){
- fgInit = kFALSE;
cout <<"Instance " << fName << " undefined" << endl;
} // end if
- fgInit = kTRUE;
-
- // geometry
- fAirGap = 5.0;
- fArm1PhiMin = 0.0;
- fArm1PhiMax = 120.0;
-
- fIPDistance = 454.0;
- fZLength = 817.0;
- fEnvelop[0] = fIPDistance;
- fEnvelop[2] = fZLength;
- fGap2Active = 1.0;
- fShellThickness = 3.18 + 1.2 + (double)((2*fNLayers -3)/2);
- fEnvelop[1] = fIPDistance + fShellThickness;
-
+ //
if (((strcmp( fName, "EMCALArch1a" )) == 0) |
((strcmp( fName, "EMCALArch1b" )) == 0)){
fNZ = 96;
((strcmp( fName, "EMCALArch2b" )) == 0)){
fNLayers = 25;
} // end if
+
+ // geometry
+ fAirGap = 5.0; // cm, air gap between EMCAL mother volume and
+ // active material.
+ fAlFrontThick = 3.18; // cm, Thickness of front Al layer
+ fPbRadThickness = 0.5; // cm, Thickness of theh Pb radiators.
+ fPreShowerSintThick = 0.6; // cm, Thickness of the sintilator for the
+ // preshower part of the calorimeter
+ fFullShowerSintThick = 0.5; // cm, Thickness of the sintilator for the
+ // full shower part of the calorimeter
+ fArm1PhiMin = 0.0; // degrees, Starting EMCAL Phi position
+ fArm1PhiMax = 120.0; // degrees, Ending EMCAL Phi position
+ fArm1EtaMin = -0.7; // pseudorapidity, Starting EMCAL Eta position
+ fArm1EtaMax = +0.7; // pseudorapidity, Ending EMCAL Eta position
+ fIPDistance = 454.0; // cm, Radial distance to inner surface of EMCAL
+ fShellThickness = GetAlFrontThickness() + 2.*GetPreSintThick() +
+ (fNLayers-2)*GetFullSintThick()+(fNLayers-1)*GetPbRadThick();
+ //below; cm, Z lenght of the EMCAL.
+ fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax);
+ fEnvelop[0] = fIPDistance; // mother volume inner radius
+ fEnvelop[1] = fIPDistance + fShellThickness; // mother volume outer r.
+ fEnvelop[2] = 1.00001*fZLength; // add some padding for mother volume.
+ fGap2Active = 1.0; // cm, Gap between
+ fgInit = kTRUE;
}
//______________________________________________________________________
AliEMCALGeometry * AliEMCALGeometry::GetInstance(){
return rv;
}
//______________________________________________________________________
-Int_t AliEMCALGeometry::TowerIndex(Int_t iz,Int_t iphi,Int_t ipre){
+Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi,Int_t ipre){
// Returns the tower index number from the based on the Z and Phi
// index numbers. There are 2 times the number of towers to separate
// out the full towsers from the pre-towsers.
// Inputs:
- // Int_t iz // index allong z axis [1-fNZ]
+ // Int_t ieta // index allong z axis [1-fNZ]
// Int_t iphi // index allong phi axis [1-fNPhi]
// Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
// Outputs:
// Int_t the absoulute tower index. [1-2*fNZ*fNPhi]
Int_t index;
- if((iz<=0 || iz>GetNZ()) || (iphi<=0 || iphi>GetNPhi()) ||
+ if((ieta<=0 || ieta>GetNEta()) || (iphi<=0 || iphi>GetNPhi()) ||
(ipre<0 || ipre>1) ){
- cout << "inputs out of range iz=" << iz << "[1-" << GetNZ();
- cout << "] iPhi=" << iphi << "[1-" << GetNPhi() << "] ipre=";
+ cout << "inputs out of range ieta=" << ieta << " [1-" << GetNEta();
+ cout << "] iphi=" << iphi << " [1-" << GetNPhi() << "] ipre=";
cout << ipre << "[0,1]. returning -1" << endl;
return -1;
} // end if
- index = iphi + GetNPhi()*(iz-1) + ipre*(GetNPhi()*GetNZ());
+ index = iphi + GetNPhi()*(ieta-1) + ipre*(GetNPhi()*GetNEta());
return index;
}
//______________________________________________________________________
-void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &iz,Int_t &iphi,
+void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi,
Int_t &ipre){
// given the tower index number it returns the based on the Z and Phi
// index numbers and if it is for the full tower or the pre-tower number.
// Inputs:
// Int_t index // Tower index number [1-2*fNZ*fNPhi]
// Outputs:
- // Int_t iz // index allong z axis [1-fNZ]
+ // Int_t ieta // index allong z axis [1-fNZ]
// Int_t iphi // index allong phi axis [1-fNPhi]
// Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
// Returned
// none.
Int_t itowers;
- itowers = GetNZ()*GetNPhi();
+ itowers = GetNEta()*GetNPhi();
if(index<1 || index>2*itowers){
cout << "index=" << index <<" is out of range [1-";
cout << 2*itowers << "], returning -1 for all." << endl;
- iz = -1; iphi = -1; ipre = -1;
+ ieta = -1; iphi = -1; ipre = -1;
return ;
} // end if
ipre = 0;
ipre = 1;
index = index - itowers;
} // end if
- iz = 1+ (Int_t)(index/GetNPhi());
- iphi = index - GetNPhi()*(iz-1);
+ ieta = 1+ (Int_t)(index/GetNPhi());
+ iphi = index - GetNPhi()*(ieta-1) +1;
return;
}
//______________________________________________________________________
// Float_t phi // phi of center of tower in degrees
// Returned
// none.
- Int_t iz,iphi,ipre;
- Double_t dz,dphi,zmax,z,phid,r;
+ Int_t ieta,iphi,ipre;
+ Double_t deta,dphi,phid;
- TowerIndexes(index,iz,iphi,ipre);
- zmax = (Double_t) GetZLength();
- dz = zmax/((Double_t)GetNZ());
- r = GetIPDistance();
- z = dz*((Double_t)iz - 0.5); // iz range [1-fNZ].
- eta = -TMath::Log(TMath::Tan(0.5*TMath::ATan2(r,z)));
- dphi = GetArm1PhiMax() - GetArm1PhiMin(); // in degrees.
- phid = GetArm1PhiMin() + dphi*((Double_t)iphi -0.5);//iphi range [1-fNphi].
+ TowerIndexes(index,ieta,iphi,ipre);
+ deta = (GetArm1EtaMax()-GetArm1EtaMin())/((Float_t)GetNEta());
+ eta = GetArm1EtaMin() + (((Float_t)ieta)-0.5)*deta;
+ dphi = (GetArm1PhiMax() - GetArm1PhiMin())/((Float_t)GetNPhi()); // in degrees.
+ phid = GetArm1PhiMin() + dphi*((Float_t)iphi -0.5);//iphi range [1-fNphi].
phi = phid;
}
//______________________________________________________________________
// none.
// Returned
// Int_t index // Tower index number [1-fNZ*fNPhi]
- Int_t iz,iphi;
- Double_t z,zp,r,zl;
+ Int_t ieta,iphi;
- r = GetIPDistance();
- z = 2.0*TMath::ATan(TMath::Exp(-eta));
- z = TMath::Tan(z);
- if(z!=0.0) z = r/z;
- else z = 0.0;
- zp = z;
- zl = GetZLength();
- z = 0.5*zl+z;
- iz = (Int_t)(((Double_t)GetNZ())*z/zl);
- if(iz<=0 || iz>GetNZ()){
- cout << "z=" << zp << " is outside of EMCAL. r=" << r << " eta =";
- cout << eta << " z length =" << zl ;
+ ieta = 1 + (Int_t)(((Float_t)GetNEta())*(eta-GetArm1EtaMin())/
+ (GetArm1EtaMax() - GetArm1EtaMin()));
+ if(ieta<=0 || ieta>GetNEta()){
+ cout << "TowerIndexFromEtaPhi:";
+ cout << "ieta = "<< ieta << " eta=" << eta << " is outside of EMCAL. etamin=";
+ cout << GetArm1EtaMin() << " to etamax=" << GetArm1EtaMax();
cout << " returning -1" << endl;
return -1;
} // end if
- iphi =(Int_t)(((Double_t)GetNPhi())*((Double_t)phi)/
- ((Double_t)(GetArm1PhiMax() - GetArm1PhiMin())));
+ iphi = 1 + (Int_t)(((Float_t)GetNPhi())*(phi-GetArm1PhiMin())/
+ ((Float_t)(GetArm1PhiMax() - GetArm1PhiMin())));
if(iphi<=0 || iphi>GetNPhi()){
- cout << "phi=" << phi << " is outside of EMCAL. r=" << r;
+ cout << "TowerIndexFromEtaPhi:";
+ cout << "iphi=" << iphi << " phi=" << phi << " is outside of EMCAL.";
cout << " Phimin=" << GetArm1PhiMin() << " PhiMax=" << GetArm1PhiMax();
cout << " returning -1" << endl;
return -1;
} // end if
- return TowerIndex(iz,iphi,0);
+ return TowerIndex(ieta,iphi,0);
}
//______________________________________________________________________
Int_t AliEMCALGeometry::PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi){
// Returned
// Int_t index // PreTower index number [fNZ*fNPhi-2*fNZ*fNPhi]
- return GetNZ()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi);
+ return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi);
}
//______________________________________________________________________
Bool_t AliEMCALGeometry::AbsToRelNumbering(Int_t AbsId, Int_t *relid){
// Outputs:
// Int_t *relid // array of 5. Discribed above.
Bool_t rv = kTRUE ;
- Int_t iz=0,iphi=0,ipre=0,index=AbsId;
+ Int_t ieta=0,iphi=0,ipre=0,index=AbsId;
- TowerIndexes(index,iz,iphi,ipre);
+ TowerIndexes(index,ieta,iphi,ipre);
relid[0] = 1;
relid[1] = 0;
if(ipre==1) relid[1] = -1;
- relid[2] = iz;
+ relid[2] = ieta;
relid[3] = iphi;
return rv;
Float_t &phi){
// Converts the relative numbering into the local PHOS-module (x, z)
// coordinates
- Int_t iz = relid[2]; // offset along x axis
+ Int_t ieta = relid[2]; // offset along x axis
Int_t iphi = relid[3]; // offset along z axis
Int_t ipre = relid[1]; // indecates -1 preshower, or 0 full tower.
Int_t index;
Float_t eta;
if(ipre==-1) ipre = 1;
- index = TowerIndex(iz,iphi,ipre);
+ index = TowerIndex(ieta,iphi,ipre);
EtaPhiFromIndex(index,eta,phi);
theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
// Returned
// Boot_t kTRUE if the towers are neighbours otherwise false.
Boot_t anb = kFALSE;
- Int_t iz1 = 0, iz2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0;
+ Int_t ieta1 = 0, ieta2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0;
- TowerIndexes(index1,iz1,iphi1,ipre1);
- TowerIndexes(index2,iz2,iphi2,ipre2);
+ TowerIndexes(index1,ieta1,iphi1,ipre1);
+ TowerIndexes(index2,ieta2,iphi2,ipre2);
if(ipre1!=ipre2) return anb;
- if((iz1>=iz2-1 && iz1<=iz2+1) && (iphi1>=iphi2-1 && iphi1<=iphi2+1))
+ if((ieta1>=ieta2-1 && ieta1<=ieta2+1) && (iphi1>=iphi2-1 &&iphi1<=iphi2+1))
anb = kTRUE;
return anb;
}
#include "AliGeometry.h"
-
class AliEMCALGeometry : public AliGeometry {
public:
AliEMCALGeometry() {
// Return EMCA geometrical parameters
// geometry
const Float_t GetAirGap() const { return fAirGap ; }
+ const Float_t GetAlFrontThickness() const { return fAlFrontThick;}
const Float_t GetArm1PhiMin() const { return fArm1PhiMin ; }
const Float_t GetArm1PhiMax() const { return fArm1PhiMax ; }
+ const Float_t GetArm1EtaMin() const { return fArm1EtaMin;}
+ const Float_t GetArm1EtaMax() const { return fArm1EtaMax;}
const Float_t GetIPDistance() const { return fIPDistance ; }
const Float_t GetEnvelop(Int_t index) const { return fEnvelop[index] ; }
const Float_t GetShellThickness() const { return fShellThickness ; }
const Float_t GetZLength() const { return fZLength ; }
const Float_t GetGap2Active() const {return fGap2Active ; }
+ const Float_t GetDeltaEta() const {return (fArm1EtaMax-fArm1EtaMin)/
+ ((Float_t)fNZ);}
+ const Float_t GetDeltaPhi() const {return (fArm1PhiMax-fArm1PhiMin)/
+ ((Float_t)fNPhi);}
const Int_t GetNLayers() const {return fNLayers ;}
const Int_t GetNZ() const {return fNZ ;}
+ const Int_t GetNEta() const {return fNZ ;}
const Int_t GetNPhi() const {return fNPhi ;}
+ const Float_t GetPbRadThick(){ // returns Pb radiator thickness in cm.
+ return fPbRadThickness;
+ }
+ const Float_t GetFullSintThick(){ // returns Full tower sintilator
+ // thickness in cm.
+ return fFullShowerSintThick;
+ }
+ const Float_t GetPreSintThick(){ // returns PreShower tower sintilator
+ // thickness in cm.
+ return fPreShowerSintThick;
+ }
+ Float_t AngleFromEta(Float_t eta){ // returns angle in radians for a given
+ // pseudorapidity.
+ return 2.0*TMath::ATan(TMath::Exp(-eta));
+ }
+ Float_t ZFromEtaR(Float_t r,Float_t eta){ // returns z in for a given
+ // pseudorapidity and r=sqrt(x*x+y*y).
+ return r/TMath::Tan(AngleFromEta(eta));
+ }
Int_t TowerIndex(Int_t iz,Int_t iphi,Int_t ipre); // returns tower index
// returns tower indexs iz, iphi.
void TowerIndexes(Int_t index,Int_t &iz,Int_t &iphi,Int_t &ipre);
protected:
AliEMCALGeometry(const Text_t* name, const Text_t* title="") :
- AliGeometry(name, title) {
- // ctor only for internal usage (singleton)
- Init() ;
+ AliGeometry(name, title) {// ctor only for internal usage (singleton)
+ Init();
};
void Init(void) ; // initializes the parameters of EMCAL
+
private:
static AliEMCALGeometry * fgGeom ; // pointer to the unique instance
// of the singleton
- static Bool_t fgInit ;// Tells if geometry has been succesfully set up
- // geometry
- Float_t fAirGap ; // Distance between envelop and active material
- Float_t fArm1PhiMin ; // Minimum angular position of EMCAL in Phi (degrees)
- Float_t fArm1PhiMax ; // Maximum angular position of EMCAL in Phi (degrees)
+ static Bool_t fgInit;// Tells if geometry has been succesfully set up.
+ Float_t fAirGap; // Distance between envelop and active material
+ Float_t fAlFrontThick; // Thickness of the front Al face of the support box
+ Float_t fPreShowerSintThick; // Thickness of the sintilator for the
+ // preshower part of the calorimeter
+ Float_t fFullShowerSintThick;// Thickness of the sintilaor for the full
+ // shower part of the calorimeter
+ Float_t fPbRadThickness; // Thickness of Pb radiators cm.
+ Float_t fArm1PhiMin; // Minimum angular position of EMCAL in Phi (degrees)
+ Float_t fArm1PhiMax; // Maximum angular position of EMCAL in Phi (degrees)
+ Float_t fArm1EtaMin; // Minimum pseudorapidity position of EMCAL in Eta
+ Float_t fArm1EtaMax; // Maximum pseudorapidity position of EMCAL in Eta
// It is assumed that Arm1 and Arm2 have the same following parameters
- Float_t fEnvelop[3] ; // the GEANT TUB for the detector
- Float_t fIPDistance ; // Distance of the inner surface to the
- // interaction point
- Float_t fShellThickness ; // Total thickness in (x,y) direction
- Float_t fZLength ; // Total length in z direction
- Float_t fGap2Active ; // Gap between the envelop and the active material
- Int_t fNLayers ; // Number of layers of material in the R direction
- Int_t fNZ ; // Number of Towers in the Z direction
- Int_t fNPhi ; //Number of Towers in the Phi Direction
+ Float_t fEnvelop[3]; // the GEANT TUB for the detector
+ Float_t fIPDistance; // Radial Distance of the inner surface of the EMCAL
+ Float_t fShellThickness; // Total thickness in (x,y) direction
+ Float_t fZLength; // Total length in z direction
+ Float_t fGap2Active; // Gap between the envelop and the active material
+ Int_t fNLayers; // Number of layers of material in the R direction
+ Int_t fNZ; // Number of Towers in the Z direction
+ Int_t fNPhi; //Number of Towers in the Phi Direction
- ClassDef(AliEMCALGeometry,2) // EMCAL geometry class
+ ClassDef(AliEMCALGeometry,3) // EMCAL geometry class
-} ;
+};
#endif // AliEMCALGEOMETRY_H
-
-
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff