//#include <TLinearFitter.h>
//#include <TH1F.h>
//#include <TProfile2D.h>
+#include <TVector3.h>
#include "TMath.h"
+#include "AliTracker.h"
+#include "AliGeomManager.h"
#include "AliITSRecPoint.h"
#include "AliITSClusterParam.h"
+#include "AliITSReconstructor.h"
+#include "AliExternalTrackParam.h"
+#include "AliCheb3DCalc.h"
ClassImp(AliITSClusterParam)
}
//-------------------------------------------------------------------------
void AliITSClusterParam::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/,
- Float_t theta,Float_t phi,
+ Float_t tgl,Float_t tgphitr,
Float_t &ny,Float_t &nz)
{
//
- //get "mean shape"
+ // Get "mean shape" (original parametrization from AliITStrackerMI)
//
- if (layer==0){
- ny = 1.+TMath::Abs(phi)*3.2;
- nz = 1.+TMath::Abs(theta)*0.34;
+ tgl = TMath::Abs(tgl);
+ tgphitr = TMath::Abs(tgphitr);
+
+ // SPD
+ if (layer==0) {
+ ny = 1.+tgphitr*3.2;
+ nz = 1.+tgl*0.34;
return;
}
- if (layer==1){
- ny = 1.+TMath::Abs(phi)*3.2;
- nz = 1.+TMath::Abs(theta)*0.28;
+ if (layer==1) {
+ ny = 1.+tgphitr*3.2;
+ nz = 1.+tgl*0.28;
return;
}
-
- if (layer>3){
- ny = 2.02+TMath::Abs(phi)*1.95;
- nz = 2.02+TMath::Abs(phi)*2.35;
+ // SSD
+ if (layer==4 || layer==5) {
+ ny = 2.02+tgphitr*1.95;
+ nz = 2.02+tgphitr*2.35;
return;
}
- ny = 6.6-2.7*TMath::Abs(phi);
- nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
+ // SDD
+ ny = 6.6-2.7*tgphitr;
+ nz = 2.8-3.11*tgphitr+0.45*tgl;
+ return;
}
//--------------------------------------------------------------------------
-Int_t AliITSClusterParam::GetError(Int_t layer,const AliITSRecPoint*cl,
- Float_t theta,Float_t phi,Float_t expQ,
- Float_t &erry,Float_t &errz)
+Int_t AliITSClusterParam::GetError(Int_t layer,
+ const AliITSRecPoint *cl,
+ Float_t tgl,Float_t tgphitr,Float_t expQ,
+ Float_t &erry,Float_t &errz,Float_t &covyz,
+ Bool_t addMisalErr)
{
- //calculate cluster position error
+ //
+ // Calculate cluster position error
+ //
+ static Double_t bz = (Double_t)AliTracker::GetBz();
+ Int_t retval=0;
+ covyz=0.;
+ switch(AliITSReconstructor::GetRecoParam()->GetClusterErrorsParam()) {
+ case 0:
+ retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
+ break;
+ case 1:
+ retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz);
+ break;
+ case 2:
+ retval = GetErrorParamAngle(layer,cl,tgl,tgphitr,erry,errz);
+ break;
+ case 3:
+ retval = GetErrorParamAngleOld(layer,cl,tgl,tgphitr,erry,errz);
+ break;
+ default:
+ retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz);
+ break;
+ }
+
+ // for SSD use the error provided by the cluster finder
+ // if single-sided clusters are enabled
+ if(layer>=4 && AliITSReconstructor::GetRecoParam()->GetUseBadChannelsInClusterFinderSSD()) {
+ //printf("error 1 erry errz covyz %10.7f %10.7f %15.13f\n",erry,errz,covyz);
+ retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
+ //printf("type %d erry errz covyz %10.7f %10.7f %15.13f\n",cl->GetType(),erry,errz,covyz);
+ }
+
+ if(addMisalErr) {
+ // add error due to misalignment (to be improved)
+ Float_t errmisalY2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz)
+ *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz);
+ Float_t errmisalZ2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer,bz)
+ *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer,bz);
+ erry = TMath::Sqrt(erry*erry+errmisalY2);
+ errz = TMath::Sqrt(errz*errz+errmisalZ2);
+ }
+
+ return retval;
+
+}
+//--------------------------------------------------------------------------
+Int_t AliITSClusterParam::GetErrorOrigRecPoint(const AliITSRecPoint*cl,
+ Float_t &erry,Float_t &errz,Float_t &covyz)
+{
+ //
+ // Calculate cluster position error (just take error from AliITSRecPoint)
+ //
+ erry = TMath::Sqrt(cl->GetSigmaY2());
+ errz = TMath::Sqrt(cl->GetSigmaZ2());
+ covyz = cl->GetSigmaYZ();
+
+ return 1;
+}
+//--------------------------------------------------------------------------
+Int_t AliITSClusterParam::GetErrorParamMI(Int_t layer,const AliITSRecPoint*cl,
+ Float_t tgl,Float_t tgphitr,
+ Float_t expQ,
+ Float_t &erry,Float_t &errz)
+{
+ //
+ // Calculate cluster position error (original parametrization from
+ // AliITStrackerMI)
//
Float_t nz,ny;
- GetNTeor(layer, cl,theta,phi,ny,nz);
+ GetNTeor(layer, cl,tgl,tgphitr,ny,nz);
erry = TMath::Sqrt(cl->GetSigmaY2());
errz = TMath::Sqrt(cl->GetSigmaZ2());
//
errz = 0.57*scale;
return 100;
}
- Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
+ Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr));
Float_t chargematch = TMath::Max(double(normq/expQ),2.);
//
if (cl->GetType()==1 || cl->GetType()==10 ){
return 109;
}
//DRIFTS
- Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
+ Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr));
Float_t chargematch = normq/expQ;
chargematch/=2.4; // F. Prino Sept. 2007: SDD charge conversion keV->ADC
Float_t factorz=1;
return 200;
}
//--------------------------------------------------------------------------
+Int_t AliITSClusterParam::GetErrorParamAngle(Int_t layer,
+ const AliITSRecPoint *cl,
+ Float_t tgl,Float_t tgphitr,
+ Float_t &erry,Float_t &errz)
+{
+ //
+ // Calculate cluster position error (parametrization extracted from rp-hit
+ // residuals, as a function of angle between track and det module plane.
+ // Origin: M.Lunardon, S.Moretto)
+ //
+ const int kNcfSPDResX = 21;
+ const float kCfSPDResX[kNcfSPDResX] = {+1.1201e+01,+2.0903e+00,-2.2909e-01,-2.6413e-01,+4.2135e-01,-3.7190e-01,
+ +4.2339e-01,+1.8679e-01,-5.1249e-01,+1.8421e-01,+4.8849e-02,-4.3127e-01,
+ -1.1148e-01,+3.1984e-03,-2.5743e-01,-6.6408e-02,+3.0756e-01,+2.6809e-01,
+ -5.0339e-03,-1.4964e-01,-1.1001e-01};
+ const float kSPDazMax=56.000000;
+ //
+ const int kNcfSPDMeanX = 16;
+ const float kCfSPDMeanX[kNcfSPDMeanX] = {-1.2532e+00,-3.8185e-01,-8.9039e-01,+2.6648e+00,+7.0361e-01,+1.2298e+00,
+ +3.2871e-01,+7.8487e-02,-1.6792e-01,-1.3966e-01,-3.1670e-01,-2.1795e-01,
+ -1.9451e-01,-4.9347e-02,-1.9186e-01,-1.9195e-01};
+ //
+ const int kNcfSPDResZ = 5;
+ const float kCfSPDResZ[kNcfSPDResZ] = {+9.2384e+01,+3.4352e-01,-2.7317e+01,-1.4642e-01,+2.0868e+00};
+ const float kSPDpolMin=34.358002, kSPDpolMax=145.000000;
+ //
+ const Double_t kMaxSigmaSDDx=100.;
+ const Double_t kMaxSigmaSDDz=400.;
+ const Double_t kMaxSigmaSSDx=100.;
+ const Double_t kMaxSigmaSSDz=1000.;
+ //
+ const Double_t kParamSDDx[2]={30.93,0.059};
+ const Double_t kParamSDDz[2]={33.09,0.011};
+ const Double_t kParamSSDx[2]={18.64,-0.0046};
+ const Double_t kParamSSDz[2]={784.4,-0.828};
+ Double_t sigmax=1000.0,sigmaz=1000.0;
+ Double_t biasx = 0.0;
+
+ Int_t volId = (Int_t)cl->GetVolumeId();
+ Double_t rotMA[9]; AliGeomManager::GetRotation(volId,rotMA); // misaligned rotation
+ Double_t rotOR[9]; AliGeomManager::GetOrigRotation(volId,rotOR); // original rotation
+ // difference in phi of original and misaligned sensors
+ double cross = rotOR[1]*rotMA[4]-rotOR[4]*rotMA[1];
+ cross /= TMath::Sqrt( (1.-rotOR[7]*rotOR[7]) * (1.-rotMA[7]*rotMA[7]) );
+ Double_t angleAzi = TMath::Abs(TMath::ATan(tgphitr) - TMath::ASin(cross) );
+ Double_t anglePol = TMath::Abs(TMath::ATan(tgl));
+
+ if(angleAzi>0.5*TMath::Pi()) angleAzi = TMath::Pi()-angleAzi;
+ if(anglePol>0.5*TMath::Pi()) anglePol = TMath::Pi()-anglePol;
+ Double_t angleAziDeg = angleAzi*180./TMath::Pi();
+ Double_t anglePolDeg = anglePol*180./TMath::Pi();
+
+ if(layer==0 || layer==1) { // SPD
+ //
+ float phiInt = angleAziDeg/kSPDazMax; // mapped to -1:1
+ if (phiInt>1) phiInt = 1; else if (phiInt<-1) phiInt = -1;
+ float phiAbsInt = (TMath::Abs(angleAziDeg+angleAziDeg) - kSPDazMax)/kSPDazMax; // mapped to -1:1
+ if (phiAbsInt>1) phiAbsInt = 1; else if (phiAbsInt<-1) phiAbsInt = -1;
+ anglePolDeg += 90; // the parameterization was provided in polar angle (90 deg - normal to sensor)
+ float polInt = (anglePolDeg+anglePolDeg - (kSPDpolMax+kSPDpolMin))/(kSPDpolMax-kSPDpolMin); // mapped to -1:1
+ if (polInt>1) polInt = 1; else if (polInt<-1) polInt = -1;
+ //
+ sigmax = AliCheb3DCalc::ChebEval1D(phiAbsInt, kCfSPDResX , kNcfSPDResX);
+ biasx = AliCheb3DCalc::ChebEval1D(phiInt , kCfSPDMeanX, kNcfSPDMeanX);
+ sigmaz = AliCheb3DCalc::ChebEval1D(polInt , kCfSPDResZ , kNcfSPDResZ);
+ //
+ // for the moment for the SPD only, need to decide where to put it
+ biasx *= 1e-4;
+
+ } else if(layer==2 || layer==3) { // SDD
+
+ sigmax = angleAziDeg*kParamSDDx[1]+kParamSDDx[0];
+ sigmaz = kParamSDDz[0]+kParamSDDz[1]*anglePolDeg;
+ if(sigmax > kMaxSigmaSDDx) sigmax = kMaxSigmaSDDx;
+ if(sigmaz > kMaxSigmaSDDz) sigmax = kMaxSigmaSDDz;
+
+ } else if(layer==4 || layer==5) { // SSD
+
+ sigmax = angleAziDeg*kParamSSDx[1]+kParamSSDx[0];
+ sigmaz = kParamSSDz[0]+kParamSSDz[1]*anglePolDeg;
+ if(sigmax > kMaxSigmaSSDx) sigmax = kMaxSigmaSSDx;
+ if(sigmaz > kMaxSigmaSSDz) sigmax = kMaxSigmaSSDz;
+
+ }
+
+ // convert from micron to cm
+ erry = 1.e-4*sigmax;
+ errz = 1.e-4*sigmaz;
+
+
+ return 1;
+}
+//--------------------------------------------------------------------------
+Int_t AliITSClusterParam::GetErrorParamAngleOld(Int_t layer,
+ const AliITSRecPoint *cl,
+ Float_t tgl,Float_t tgphitr,
+ Float_t &erry,Float_t &errz)
+{
+ //
+ // Calculate cluster position error (parametrization extracted from rp-hit
+ // residuals, as a function of angle between track and det module plane.
+ // Origin: M.Lunardon, S.Moretto)
+ //
+
+ Double_t maxSigmaSPDx=100.;
+ Double_t maxSigmaSPDz=400.;
+ Double_t maxSigmaSDDx=100.;
+ Double_t maxSigmaSDDz=400.;
+ Double_t maxSigmaSSDx=100.;
+ Double_t maxSigmaSSDz=1000.;
+
+ Double_t paramSPDx[3]={-6.417,0.18,11.14};
+ Double_t paramSPDz[2]={118.,-0.155};
+ Double_t paramSDDx[2]={30.93,0.059};
+ Double_t paramSDDz[2]={33.09,0.011};
+ Double_t paramSSDx[2]={18.64,-0.0046};
+ Double_t paramSSDz[2]={784.4,-0.828};
+ Double_t sigmax=1000.0,sigmaz=1000.0;
+
+ Int_t volId = (Int_t)cl->GetVolumeId();
+ Double_t rotMA[9]; AliGeomManager::GetRotation(volId,rotMA); // misaligned rotation
+ Double_t rotOR[9]; AliGeomManager::GetOrigRotation(volId,rotOR); // original rotation
+ // difference in phi of original and misaligned sensors
+ double cross = rotOR[1]*rotMA[4]-rotOR[4]*rotMA[1];
+ cross /= TMath::Sqrt( (1.-rotOR[7]*rotOR[7]) * (1.-rotMA[7]*rotMA[7]) );
+ Double_t angleAzi = TMath::Abs(TMath::ATan(tgphitr) - TMath::ASin(cross) );
+ Double_t anglePol = TMath::Abs(TMath::ATan(tgl));
+
+ if(angleAzi>0.5*TMath::Pi()) angleAzi = TMath::Pi()-angleAzi;
+ if(anglePol>0.5*TMath::Pi()) anglePol = TMath::Pi()-anglePol;
+ Double_t angleAziDeg = angleAzi*180./TMath::Pi();
+ Double_t anglePolDeg = anglePol*180./TMath::Pi();
+
+ if(layer==0 || layer==1) { // SPD
+
+ sigmax = TMath::Exp(angleAziDeg*paramSPDx[1]+paramSPDx[0])+paramSPDx[2];
+ sigmaz = paramSPDz[0]+paramSPDz[1]*anglePolDeg;
+ if(sigmax > maxSigmaSPDx) sigmax = maxSigmaSPDx;
+ if(sigmaz > maxSigmaSPDz) sigmax = maxSigmaSPDz;
+
+ } else if(layer==2 || layer==3) { // SDD
+
+ sigmax = angleAziDeg*paramSDDx[1]+paramSDDx[0];
+ sigmaz = paramSDDz[0]+paramSDDz[1]*anglePolDeg;
+ if(sigmax > maxSigmaSDDx) sigmax = maxSigmaSDDx;
+ if(sigmaz > maxSigmaSDDz) sigmax = maxSigmaSDDz;
+
+ } else if(layer==4 || layer==5) { // SSD
+
+ sigmax = angleAziDeg*paramSSDx[1]+paramSSDx[0];
+ sigmaz = paramSSDz[0]+paramSSDz[1]*anglePolDeg;
+ if(sigmax > maxSigmaSSDx) sigmax = maxSigmaSSDx;
+ if(sigmaz > maxSigmaSSDz) sigmax = maxSigmaSSDz;
+
+ }
+
+ // convert from micron to cm
+ erry = 1.e-4*sigmax;
+ errz = 1.e-4*sigmaz;
+
+ return 1;
+}
+//--------------------------------------------------------------------------
void AliITSClusterParam::Print(Option_t* /*option*/) const {
//
// Print param Information
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