#include "AliITSClusterParam.h"
#include "AliITSReconstructor.h"
#include "AliExternalTrackParam.h"
+#include "AliCheb3DCalc.h"
ClassImp(AliITSClusterParam)
//
// Calculate cluster position error
//
+ static Double_t bz = (Double_t)AliTracker::GetBz();
Int_t retval=0;
covyz=0.;
switch(AliITSReconstructor::GetRecoParam()->GetClusterErrorsParam()) {
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;
}
if(addMisalErr) {
- Double_t bz = (Double_t)AliTracker::GetBz();
// add error due to misalignment (to be improved)
Float_t errmisalY2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz)
*AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz);
// 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 sigmax=1000.0,sigmaz=1000.0;
Int_t volId = (Int_t)cl->GetVolumeId();
- Double_t tra[3]; AliGeomManager::GetOrigTranslation(volId,tra);
- Double_t rot[9]; AliGeomManager::GetOrigRotation(volId,rot);
-
-
- Double_t phitr = TMath::ATan(tgphitr);
- Double_t alpha = TMath::ATan2(tra[1],tra[0]);
- Double_t phiglob = alpha+phitr;
- Double_t p[3];
- p[0] = TMath::Cos(phiglob);
- p[1] = TMath::Sin(phiglob);
- p[2] = tgl;
- TVector3 pvec(p[0],p[1],p[2]);
- TVector3 normvec(rot[1],rot[4],rot[7]);
- Double_t angle = pvec.Angle(normvec);
- if(angle>0.5*TMath::Pi()) angle = TMath::Pi()-angle;
- Double_t angleDeg = angle*180./TMath::Pi();
+ 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(angleDeg*paramSPDx[1]+paramSPDx[0])+paramSPDx[2];
- sigmaz = paramSPDz[0]+paramSPDz[1]*angleDeg;
+ 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 = angleDeg*paramSDDx[1]+paramSDDx[0];
- sigmaz = paramSDDz[0]+paramSDDz[1]*angleDeg;
+ 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 = angleDeg*paramSSDx[1]+paramSSDx[0];
- sigmaz = paramSSDz[0]+paramSSDz[1]*angleDeg;
+ sigmax = angleAziDeg*paramSSDx[1]+paramSSDx[0];
+ sigmaz = paramSSDz[0]+paramSSDz[1]*anglePolDeg;
if(sigmax > maxSigmaSSDx) sigmax = maxSigmaSSDx;
if(sigmaz > maxSigmaSSDz) sigmax = maxSigmaSSDz;
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff