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It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$*/ //_________________________________________________________________________ // Geometry class for EMCAL : singleton // EMCAL consists of layers of scintillator and lead // Places the the Barrel Geometry of The EMCAL at Midrapidity // between 0 and 120 degrees of Phi and // -0.7 to 0.7 in eta // Number of Modules and Layers may be controlled by // the name of the instance defined // EMCALArch2x has more modules along both phi and eta // EMCALArchxa has less Layers in the Radial Direction //*-- Author: Sahal Yacoob (LBL / UCT) // and : Yves Schutz (SUBATECH) // and : Jennifer Klay (LBL) // --- ROOT system --- // --- Standard library --- #include // --- AliRoot header files --- #include #include #include // -- ALICE Headers. #include "AliConst.h" // --- EMCAL headers #include "AliEMCALGeometry.h" ClassImp(AliEMCALGeometry); AliEMCALGeometry *AliEMCALGeometry::fgGeom = 0; Bool_t AliEMCALGeometry::fgInit = kFALSE; //______________________________________________________________________ AliEMCALGeometry::~AliEMCALGeometry(void){ // dtor } //______________________________________________________________________ const Bool_t AliEMCALGeometry::AreInSameTower(Int_t id1, Int_t id2) const { Int_t idmax = TMath::Max(id1, id2) ; Int_t idmin = TMath::Min(id1, id2) ; if ( ((idmax - GetNZ() * GetNPhi()) == idmin ) || ((idmax - 2 * GetNZ() * GetNPhi()) == idmin ) ) return kTRUE ; else return kFALSE ; } //______________________________________________________________________ void AliEMCALGeometry::Init(void){ // Initializes the EMCAL parameters // naming convention : GUV_L_WX_N_YZ_M gives the composition of a tower // UV inform about the compsition of the pre-shower section: // thickness in mm of Pb radiator (U) and of scintillator (V), and number of scintillator layers (L) // WX inform about the composition of the EM calorimeter section: // thickness in mm of Pb radiator (W) and of scintillator (X), and number of scintillator layers (N) // YZ inform about the composition of the hadron calorimeter section: // thickness in mm of Cu radiator (Y) and of scintillator (Z), and number of scintillator layers (M) // Valid geometries are G56_2_55_19_104_14 // G56_2_55_19 or EMCAL_5655_21 // G65_2_64_19 or EMCAL_6564_21 fgInit = kFALSE; // Assume failer untill proven otherwise. TString name(GetName()) ; if ( name == "G56_2_55_19_104_14" ) { fPRPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the preshower section fPRScintThick = 0.6; // cm, Thickness of the sintilator for the preshower section of the tower fNPRLayers = 2; // number of scintillator layers in the preshower section fECPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the EM calorimeter section fECScintThick = 0.5; // cm, Thickness of the sintilator for the EM alorimeter section of the tower fNECLayers = 19; // number of scintillator layers in the EM calorimeter section fHCCuRadThickness = 1.0; // cm, Thickness of the Cu radiators. fHCScintThick = 0.4; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower fNHCLayers = 14; // number of scintillator layers in the hadronic calorimeter section fSampling = 11.3 ; fSummationFraction = 0.8 ; fAlFrontThick = 3.0; // cm, Thickness of front Al layer fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator } else if ( name == "G56_2_55_19" || name == "EMCAL_5655_21" ) { fPRPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the preshower section fPRScintThick = 0.6; // cm, Thickness of the sintilator for the preshower section of the tower fNPRLayers = 2; // number of scintillator layers in the preshower section fECPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the EM calorimeter section fECScintThick = 0.5; // cm, Thickness of the sintilator for the EM alorimeter section of the tower fNECLayers = 19; // number of scintillator layers in the EM calorimeter section fHCCuRadThickness = 0.0; // cm, Thickness of the Cu radiators. fHCScintThick = 0.0; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower fNHCLayers = 0; // number of scintillator layers in the hadronic calorimeter section fSampling = 11.3 ; fSummationFraction = 0.8 ; fAlFrontThick = 3.0; // cm, Thickness of front Al layer fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator } else if ( name == "G65_2_64_19" || name == "EMCAL_6564_21" ) { fPRPbRadThickness = 0.6; // cm, Thickness of the Pb radiators for the preshower section fPRScintThick = 0.5; // cm, Thickness of the sintilator for the preshower section of the tower fNPRLayers = 2; // number of scintillator layers in the preshower section fECPbRadThickness = 0.6; // cm, Thickness of the Pb radiators for the EM calorimeter section fECScintThick = 0.4; // cm, Thickness of the sintilator for the EM alorimeter section of the tower fNECLayers = 19; // number of scintillator layers in the EM calorimeter section fHCCuRadThickness = 0.0; // cm, Thickness of the Cu radiators. fHCScintThick = 0.0; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower fNHCLayers = 0; // number of scintillator layers in the hadronic calorimeter section fSampling = 16. ; fSummationFraction = 0.8 ; fAlFrontThick = 3.0; // cm, Thickness of front Al layer fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator } else Fatal("Init", "%s is an undefined geometry!", name.Data()) ; // if( name != "EMCALArch1a" && // name != "EMCALArch1b" && // name != "EMCALArch2a" && // name != "EMCALArch2b" && // name != "EMCALArch1aN" ){ // Fatal("Init", "%s is not a known geometry (choose among EMCALArch1a, EMCALArch1b, EMCALArch2a and EMCALArch2b, EMCALArch1aN)", name.Data()) ; // } // end if // // // if ( name == "EMCALArch1a" || // name == "EMCALArch1b" || // name == "EMCALArch1aN") { // fNZ = 96; // fNPhi = 144; // } // end if // if ( name == "EMCALArch2a" || // name == "EMCALArch2b" ) { // fNZ = 112; // fNPhi = 168; // } // end if // if ( name == "EMCALArch1a" || // name == "EMCALArch2a" ) { // fNPRLayers = 2; // fNECLayers = 19; // fNHCLayers = 0; // } // end if // if ( name == "EMCALArch1b" || // name == "EMCALArch2b" ) { // fNPRLayers = 2; // fNECLayers = 23; // fNHCLayers = 0; // } // end if // if ( name == "EMCALArch1aN") { // fNPRLayers = 2; // fNECLayers = 19; // fNHCLayers = 14; // } // geometry fNZ = 96; // granularity along Z (eta) fNPhi = 144; // granularity in phi (azimuth) fArm1PhiMin = 60.0; // degrees, Starting EMCAL Phi position fArm1PhiMax = 180.0; // 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 = fAlFrontThick + fGap2Active + 2.*(GetPRScintThick() + GetPRPbRadThick()) + // pre shower (fNECLayers-1)*(GetECScintThick()+ GetECPbRadThick()) + // E cal -1 because the last element is a scintillator fNHCLayers*(GetHCScintThick()+ GetHCCuRadThick()) + // H cal GetHCScintThick() ; // last scintillator fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax); // Z coverage 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. fgInit = kTRUE; Info("Init", "geometry of EMCAL named %s is as follows:", name.Data()); printf( "Tower geometry pre-shower: %d x (%f mm Pb, %f mm Sc) \n", GetNPRLayers(), GetPRPbRadThick(), GetPRScintThick() ) ; printf( " ECAL : %d x (%f mm Pb, %f mm Sc) \n", GetNECLayers(), GetECPbRadThick(), GetECScintThick() ) ; if ( GetNHCLayers() > 0 ) printf( " HCAL : %d x (%f mm Pb, %f mm Sc) \n", GetNHCLayers(), GetHCCuRadThick(), GetHCScintThick() ) ; printf("Granularity: %d in eta and %d in phi\n", GetNZ(), GetNPhi()) ; printf("Layout: phi = (%f, %f), eta = (%f, %f), y = %f\n", GetArm1PhiMin(), GetArm1PhiMax(),GetArm1EtaMin(), GetArm1EtaMax(), GetIPDistance() ) ; } //______________________________________________________________________ AliEMCALGeometry * AliEMCALGeometry::GetInstance(){ // Returns the pointer of the unique instance return static_cast( fgGeom ) ; } //______________________________________________________________________ AliEMCALGeometry* AliEMCALGeometry::GetInstance(const Text_t* name, const Text_t* title){ // Returns the pointer of the unique instance AliEMCALGeometry * rv = 0; if ( fgGeom == 0 ) { if ( strcmp(name,"") == 0 ) rv = 0; else { fgGeom = new AliEMCALGeometry(name, title); if ( fgInit ) rv = (AliEMCALGeometry * ) fgGeom; else { rv = 0; delete fgGeom; fgGeom = 0; } // end if fgInit } // end if strcmp(name,"") }else{ if ( strcmp(fgGeom->GetName(), name) != 0 ) { TString message("\n") ; message += "current geometry is " ; message += fgGeom->GetName() ; message += "\n you cannot call " ; message += name ; ::Info("GetGeometry", message.Data() ) ; }else{ rv = (AliEMCALGeometry *) fgGeom; } // end if } // end if fgGeom return rv; } //______________________________________________________________________ Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi) const { // 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 towers from the pre-showers. // Inputs: // Int_t ieta // index allong z axis [1-fNZ] // Int_t iphi // index allong phi axis [1-fNPhi] // Int_t where // 1 = PRE section, 0 = EC section, 2 = HC section // Outputs: // none. // Returned // Int_t index // Tower index number if ( (ieta <= 0 || ieta>GetNEta()) || (iphi <= 0 || iphi>GetNPhi())) Fatal("TowerIndex", "Unexpected parameters eta = %d phi = %d!", ieta, iphi) ; return ( (iphi - 1)*GetNEta() + ieta ); } //______________________________________________________________________ void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi, Int_t &ipre) const { // Inputs: // Int_t index // Tower index number [1-i*fNZ*fNPhi] PRE(i=1)/ECAL(i=2)/HCAL(i=3) // Outputs: // Int_t ieta // index allong z axis [1-fNZ] // Int_t iphi // index allong phi axis [1-fNPhi] // Int_t ipre // 0 = ECAL section, 1 = Pre-shower section, 2 = HCAL section // Returned // none. Int_t nindex = 0, itowers = GetNEta() * GetNPhi(); if ( IsInPRE(index) ) { // PRE index nindex = index - itowers; ipre = 1 ; } else if ( IsInECAL(index) ) { // ECAL index nindex = index ; ipre = 0 ; } else if ( IsInHCAL(index) ) { // HCAL index nindex = index - 2*itowers; ipre = 2 ; } else Fatal("TowerIndexes", "Unexpected Id number!") ; if (nindex%GetNZ()) iphi = nindex / GetNZ() + 1 ; else iphi = nindex / GetNZ() ; ieta = nindex - (iphi - 1) * GetNZ() ; if (gDebug==2) Info("TowerIndexes", "index=%d,%d, ieta=%d, iphi = %d", index, nindex,ieta, iphi) ; return; } //______________________________________________________________________ void AliEMCALGeometry::EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi) const { // given the tower index number it returns the based on the eta and phi // of the tower. // Inputs: // Int_t index // Tower index number [1-i*fNZ*fNPhi] PRE(i=1)/ECAL(i=2)/HCAL(i=3) // Outputs: // Float_t eta // eta of center of tower in pseudorapidity // Float_t phi // phi of center of tower in degrees // Returned // none. Int_t ieta, iphi, ipre ; Float_t deta, dphi ; TowerIndexes(index,ieta,iphi,ipre); if (gDebug == 2) Info("EtaPhiFromIndex","index = %d, ieta = %d, iphi = %d", index, ieta, iphi) ; deta = (GetArm1EtaMax()-GetArm1EtaMin())/(static_cast(GetNEta())); eta = GetArm1EtaMin() + ((static_cast(ieta) - 0.5 ))*deta; dphi = (GetArm1PhiMax() - GetArm1PhiMin())/(static_cast(GetNPhi())); // in degrees. phi = GetArm1PhiMin() + dphi*(static_cast(iphi) - 0.5);//iphi range [1-fNphi]. } //______________________________________________________________________ Int_t AliEMCALGeometry::TowerIndexFromEtaPhi(Float_t eta,Float_t phi) const { // returns the tower index number based on the eta and phi of the tower. // Inputs: // Float_t eta // eta of center of tower in pseudorapidity // Float_t phi // phi of center of tower in degrees // Outputs: // none. // Returned // Int_t index // Tower index number [1-fNZ*fNPhi] Int_t ieta,iphi; ieta = static_cast ( 1 + (static_cast(GetNEta()) * (eta - GetArm1EtaMin()) / (GetArm1EtaMax() - GetArm1EtaMin())) ) ; if( ieta <= 0 || ieta > GetNEta() ) { Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ; return -1 ; } iphi = static_cast ( 1 + (static_cast(GetNPhi()) * (phi - GetArm1PhiMin()) / (GetArm1PhiMax() - GetArm1PhiMin())) ) ; if( iphi <= 0 || iphi > GetNPhi() ) { Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ; return -1 ; } return TowerIndex(ieta,iphi); } //______________________________________________________________________ Int_t AliEMCALGeometry::PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi) const { // returns the pretower index number based on the eta and phi of the tower. // Inputs: // Float_t eta // eta of center of tower in pseudorapidity // Float_t phi // phi of center of tower in degrees // Outputs: // none. // Returned // Int_t index // PreTower index number [fNZ*fNPhi-2*fNZ*fNPhi] return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi); } //______________________________________________________________________ Bool_t AliEMCALGeometry::AbsToRelNumbering(Int_t AbsId, Int_t *relid) const { // Converts the absolute numbering into the following array/ // relid[0] = EMCAL Arm number 1:1 // relid[1] = 0 ECAL section ; = 1 PRE section; = 2 HCA section // relid[2] = Row number inside EMCAL // relid[3] = Column number inside EMCAL // Input: // Int_t AbsId // Tower index number [1-2*fNZ*fNPhi] // Outputs: // Int_t *relid // array of 5. Discribed above. Bool_t rv = kTRUE ; Int_t ieta=0,iphi=0,ipre=0,index=AbsId; TowerIndexes(index,ieta,iphi,ipre); relid[0] = 1; relid[1] = ipre; relid[2] = ieta; relid[3] = iphi; return rv; } //______________________________________________________________________ void AliEMCALGeometry::PosInAlice(const Int_t *relid, Float_t &theta, Float_t &phi) const { // Converts the relative numbering into the local EMCAL-module (x, z) // coordinates Int_t sect = relid[1]; // PRE/ECAL/HCAL section 1/0/2 Int_t ieta = relid[2]; // offset along x axis Int_t iphi = relid[3]; // offset along z axis Int_t index; Float_t eta; index = TowerIndex(ieta,iphi); EtaPhiFromIndex(index,eta,phi); theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi(); // correct for distance to IP different in PRE/ECAL/HCAL Float_t d = 0. ; if (sect == 1) d = GetIP2PRESection() - GetIPDistance() ; else if (sect == 0) d = GetIP2ECALSection() - GetIPDistance() ; else if (sect == 2) d = GetIP2HCALSection() - GetIPDistance() ; else Fatal("PosInAlice", "Unexpected tower section!") ; Float_t correction = 1 + d/GetIPDistance() ; Float_t tantheta = TMath::Tan(theta) * correction ; theta = TMath::ATan(tantheta) * TMath::RadToDeg() ; if (theta < 0 ) theta += 180. ; return; } //______________________________________________________________________ void AliEMCALGeometry::PosInAlice(const Int_t absid, Float_t &theta, Float_t &phi) const { // Converts the relative numbering into the local EMCAL-module (x, z) // coordinates Int_t relid[4] ; AbsToRelNumbering(absid, relid) ; Int_t ieta = relid[2]; // offset along x axis Int_t iphi = relid[3]; // offset along z axis Int_t index; Float_t eta; index = TowerIndex(ieta,iphi); EtaPhiFromIndex(index,eta,phi); theta = 2.0*TMath::ATan(TMath::Exp(-eta)) ; // correct for distance to IP different in PRE/ECAL/HCAL Float_t d = 0. ; if (IsInPRE(absid)) d = GetIP2PRESection() - GetIPDistance() ; else if (IsInECAL(absid)) d = GetIP2ECALSection() - GetIPDistance() ; else if (IsInHCAL(absid)) d = GetIP2HCALSection() - GetIPDistance() ; else Fatal("PosInAlice", "Unexpected id # %d!", absid) ; Float_t correction = 1 + d/GetIPDistance() ; Float_t tantheta = TMath::Tan(theta) * correction ; theta = TMath::ATan(tantheta) * TMath::RadToDeg() ; if (theta < 0 ) theta += 180. ; return; } //______________________________________________________________________ void AliEMCALGeometry::XYZFromIndex(const Int_t *relid,Float_t &x,Float_t &y, Float_t &z) const { // given the tower relative number it returns the X, Y and Z // of the tower. // Outputs: // Float_t x // x of center of tower in cm // Float_t y // y of center of tower in cm // Float_t z // z of centre of tower in cm // Returned // none. Float_t eta,theta, phi,cyl_radius=0. ; Int_t ieta = relid[2]; // offset along x axis Int_t iphi = relid[3]; // offset along z axis Int_t ipre = relid[1]; // indicates 0 ECAL section, 1 PRE section, 2 HCAL section. Int_t index; index = TowerIndex(ieta,iphi); EtaPhiFromIndex(index,eta,phi); theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi(); if ( ipre == 0 ) cyl_radius = GetIP2ECALSection() ; else if ( ipre == 1 ) cyl_radius = GetIP2PRESection() ; else if ( ipre == 2 ) cyl_radius = GetIP2HCALSection() ; else Fatal("XYZFromIndex", "Unexpected Tower section # %d", ipre) ; Double_t kDeg2Rad = TMath::DegToRad() ; x = cyl_radius * TMath::Cos(phi * kDeg2Rad ) ; y = cyl_radius * TMath::Sin(phi * kDeg2Rad ) ; z = cyl_radius / TMath::Tan(theta * kDeg2Rad ) ; return; } //______________________________________________________________________ void AliEMCALGeometry::XYZFromIndex(const Int_t absid, TVector3 &v) const { // given the tower relative number it returns the X, Y and Z // of the tower. // Outputs: // Float_t x // x of center of tower in cm // Float_t y // y of center of tower in cm // Float_t z // z of centre of tower in cm // Returned // none. Float_t theta, phi,cyl_radius=0. ; PosInAlice(absid, theta, phi) ; if ( IsInECAL(absid) ) cyl_radius = GetIP2ECALSection() ; else if ( IsInPRE(absid) ) cyl_radius = GetIP2PRESection() ; else if ( IsInHCAL(absid) ) cyl_radius = GetIP2HCALSection() ; else Fatal("XYZFromIndex", "Unexpected Tower section") ; Double_t kDeg2Rad = TMath::DegToRad() ; v.SetX(cyl_radius * TMath::Cos(phi * kDeg2Rad ) ); v.SetY(cyl_radius * TMath::Sin(phi * kDeg2Rad ) ); v.SetZ(cyl_radius / TMath::Tan(theta * kDeg2Rad ) ) ; return; } //______________________________________________________________________ /* Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2) const { // Returns kTRUE if the two towers are neighbours or not, including // diagonals. Both indexes are required to be either towers or preshower. // Inputs: // Int_t index1 // index of tower 1 // Int_t index2 // index of tower 2 // Outputs: // none. // Returned // Boot_t kTRUE if the towers are neighbours otherwise false. Boot_t anb = kFALSE; Int_t ieta1 = 0, ieta2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0; TowerIndexes(index1,ieta1,iphi1,ipre1); TowerIndexes(index2,ieta2,iphi2,ipre2); if(ipre1!=ipre2) return anb; if((ieta1>=ieta2-1 && ieta1<=ieta2+1) && (iphi1>=iphi2-1 &&iphi1<=iphi2+1)) anb = kTRUE; return anb; } */