#include "AliLog.h" //general
#include <AliRunLoader.h> //Stack()
#include <AliStack.h> //Stack()
+#include "AliCDBManager.h" //ctor
+#include "AliCDBEntry.h" //ctor
#include <TLatex.h> //TestTrans()
#include <TView.h> //TestTrans()
#include <TPolyMarker3D.h> //TestTrans()
#include <TParticle.h> //Stack()
#include <TGeoPhysicalNode.h> //ctor
#include <TGeoBBox.h>
+#include <TF1.h> //ctor
+
ClassImp(AliHMPIDParam)
+// Mathieson constant definition
+const Double_t AliHMPIDParam::fgkD = 0.222500; // ANODE-CATHODE distance 0.445/2
+// K3 = 0.66 along the wires (anode-cathode/wire pitch=0.5625)
+const Double_t AliHMPIDParam::fgkSqrtK3x = TMath::Sqrt(0.66);
+const Double_t AliHMPIDParam::fgkK2x = TMath::PiOver2()*(1 - 0.5*fgkSqrtK3x);
+const Double_t AliHMPIDParam::fgkK1x = 0.25*fgkK2x*fgkSqrtK3x/TMath::ATan(fgkSqrtK3x);
+const Double_t AliHMPIDParam::fgkK4x = fgkK1x/(fgkK2x*fgkSqrtK3x);
+// K3 = 0.87 along the wires (anode-cathode/wire pitch=0.5625)
+const Double_t AliHMPIDParam::fgkSqrtK3y = TMath::Sqrt(0.87);
+const Double_t AliHMPIDParam::fgkK2y = TMath::PiOver2()*(1 - 0.5*fgkSqrtK3y);
+const Double_t AliHMPIDParam::fgkK1y = 0.25*fgkK2y*fgkSqrtK3y/TMath::ATan(fgkSqrtK3y);
+const Double_t AliHMPIDParam::fgkK4y = fgkK1y/(fgkK2y*fgkSqrtK3y);
+//
+
+
Float_t AliHMPIDParam::fgkMinPcX[]={0.,0.,0.,0.,0.,0.};
Float_t AliHMPIDParam::fgkMaxPcX[]={0.,0.,0.,0.,0.,0.};
Float_t AliHMPIDParam::fgkMinPcY[]={0.,0.,0.,0.,0.,0.};
Float_t AliHMPIDParam::fgAllX=0;
Float_t AliHMPIDParam::fgAllY=0;
-Int_t AliHMPIDParam::fgSigmas=4;
Bool_t AliHMPIDParam::fgInstanceType=kTRUE;
AliHMPIDParam* AliHMPIDParam::fgInstance=0x0; //singleton pointer
+
+Int_t AliHMPIDParam::fgSigmas=4;
+
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-AliHMPIDParam::AliHMPIDParam(Bool_t noGeo=kFALSE):TNamed("HmpidParam","default version")
+AliHMPIDParam::AliHMPIDParam(Bool_t noGeo=kFALSE):
+ TNamed("HmpidParam","default version"),
+ fX(0), fY(0), fRefIdx(1.28947),fPhotEMean(6.675),fTemp(25) //just set a refractive index for C6F14 at ephot=6.675 eV @ T=25 C
{
// Here all the intitializition is taken place when AliHMPIDParam::Instance() is invoked for the first time.
// In particular, matrices to be used for LORS<->MARS trasnformations are initialized from TGeo structure.
// Note that TGeoManager should be already initialized from geometry.root file
- fRadNmean = MeanIdxRad(); //initialization of the running ref. index of freon
+ AliCDBManager *pCDB = AliCDBManager::Instance();
+ if(!pCDB) {
+ AliWarning("No Nmean C6F14 from OCDB. Default is taken from ctor.");
+ } else {
+ AliCDBEntry *pNmeanEnt =pCDB->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
+ if(!pNmeanEnt) {
+ AliWarning("No Nmean C6F14 from OCDB. Default is taken from ctor.");
+ } else {
+ TObjArray *pNmean = (TObjArray*)pNmeanEnt->GetObject();
+ if(pNmean->GetEntries()==43) { //for backward compatibility
+ Double_t tmin,tmax;
+ ((TF1*)pNmean->At(42))->GetRange(tmin,tmax);
+ fPhotEMean = ((TF1*)pNmean->At(42))->Eval(tmin); //photon eMean from OCDB
+ AliInfo(Form("EPhotMean = %f eV successfully loaded from OCDB",fPhotEMean));
+ } else {
+ AliWarning("For backward compatibility EPhotMean is taken from ctor.");
+ }
+ }
+ }
+
+ fRefIdx = MeanIdxRad(); //initialization of the running ref. index of freon
Float_t dead=2.6;// cm of the dead zones between PCs-> See 2CRC2099P1
IdealPosition(i,fM[i]);
} else {
TGeoPhysicalNode *pnode = pne->GetPhysicalNode();
- if(pnode) fM[i]=pnode->GetMatrix();
+ if(pnode) fM[i]=new TGeoHMatrix(*(pnode->GetMatrix()));
else {
fM[i]=new TGeoHMatrix;
IdealPosition(i,fM[i]);
return iCnt;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliHMPIDParam::Sigma2(Double_t trkTheta,Double_t trkPhi,Double_t ckovTh, Double_t ckovPh)
+{
+// Analithical calculation of total error (as a sum of localization, geometrical and chromatic errors) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ TVector3 v(-999,-999,-999);
+ Double_t trkBeta = 1./(TMath::Cos(ckovTh)*GetRefIdx());
+
+ if(trkBeta > 1) trkBeta = 1; //protection against bad measured thetaCer
+ if(trkBeta < 0) trkBeta = 0.0001; //
+
+ v.SetX(SigLoc (trkTheta,trkPhi,ckovTh,ckovPh,trkBeta));
+ v.SetY(SigGeom(trkTheta,trkPhi,ckovTh,ckovPh,trkBeta));
+ v.SetZ(SigCrom(trkTheta,trkPhi,ckovTh,ckovPh,trkBeta));
+
+ return v.Mag2();
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliHMPIDParam::SigLoc(Double_t trkTheta,Double_t trkPhi,Double_t thetaC, Double_t phiC,Double_t betaM)
+{
+// Analitical calculation of localization error (due to finite segmentation of PC) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ Double_t phiDelta = phiC - trkPhi;
+
+ Double_t sint = TMath::Sin(trkTheta);
+ Double_t cost = TMath::Cos(trkTheta);
+ Double_t sinf = TMath::Sin(trkPhi);
+ Double_t cosf = TMath::Cos(trkPhi);
+ Double_t sinfd = TMath::Sin(phiDelta);
+ Double_t cosfd = TMath::Cos(phiDelta);
+ Double_t tantheta = TMath::Tan(thetaC);
+
+ Double_t alpha =cost-tantheta*cosfd*sint; // formula (11)
+ Double_t k = 1.-GetRefIdx()*GetRefIdx()+alpha*alpha/(betaM*betaM); // formula (after 8 in the text)
+ if (k<0) return 1e10;
+ Double_t mu =sint*sinf+tantheta*(cost*cosfd*sinf+sinfd*cosf); // formula (10)
+ Double_t e =sint*cosf+tantheta*(cost*cosfd*cosf-sinfd*sinf); // formula (9)
+
+ Double_t kk = betaM*TMath::Sqrt(k)/(GapThick()*alpha); // formula (6) and (7)
+ Double_t dtdxc = kk*(k*(cosfd*cosf-cost*sinfd*sinf)-(alpha*mu/(betaM*betaM))*sint*sinfd); // formula (6)
+ Double_t dtdyc = kk*(k*(cosfd*sinf+cost*sinfd*cosf)+(alpha* e/(betaM*betaM))*sint*sinfd); // formula (7) pag.4
+
+ Double_t errX = 0.2,errY=0.25; //end of page 7
+ return TMath::Sqrt(errX*errX*dtdxc*dtdxc + errY*errY*dtdyc*dtdyc);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliHMPIDParam::SigCrom(Double_t trkTheta,Double_t trkPhi,Double_t thetaC, Double_t phiC,Double_t betaM)
+{
+// Analitical calculation of chromatic error (due to lack of knowledge of Cerenkov photon energy) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ Double_t phiDelta = phiC - trkPhi;
+
+ Double_t sint = TMath::Sin(trkTheta);
+ Double_t cost = TMath::Cos(trkTheta);
+ Double_t cosfd = TMath::Cos(phiDelta);
+ Double_t tantheta = TMath::Tan(thetaC);
+
+ Double_t alpha =cost-tantheta*cosfd*sint; // formula (11)
+ Double_t dtdn = cost*GetRefIdx()*betaM*betaM/(alpha*tantheta); // formula (12)
+
+// Double_t f = 0.00928*(7.75-5.635)/TMath::Sqrt(12.);
+ Double_t f = 0.0172*(7.75-5.635)/TMath::Sqrt(24.);
+
+ return f*dtdn;
+}//SigCrom()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliHMPIDParam::SigGeom(Double_t trkTheta,Double_t trkPhi,Double_t thetaC, Double_t phiC,Double_t betaM)
+{
+// Analitical calculation of geometric error (due to lack of knowledge of creation point in radiator) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Formulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ Double_t phiDelta = phiC - trkPhi;
+
+ Double_t sint = TMath::Sin(trkTheta);
+ Double_t cost = TMath::Cos(trkTheta);
+ Double_t sinf = TMath::Sin(trkPhi);
+ Double_t cosfd = TMath::Cos(phiDelta);
+ Double_t costheta = TMath::Cos(thetaC);
+ Double_t tantheta = TMath::Tan(thetaC);
+
+ Double_t alpha =cost-tantheta*cosfd*sint; // formula (11)
+
+ Double_t k = 1.-GetRefIdx()*GetRefIdx()+alpha*alpha/(betaM*betaM); // formula (after 8 in the text)
+ if (k<0) return 1e10;
+
+ Double_t eTr = 0.5*RadThick()*betaM*TMath::Sqrt(k)/(GapThick()*alpha); // formula (14)
+ Double_t lambda = (1.-sint*sinf)*(1.+sint*sinf); // formula (15)
+
+ Double_t c1 = 1./(1.+ eTr*k/(alpha*alpha*costheta*costheta)); // formula (13.a)
+ Double_t c2 = betaM*TMath::Power(k,1.5)*tantheta*lambda/(GapThick()*alpha*alpha); // formula (13.b)
+ Double_t c3 = (1.+eTr*k*betaM*betaM)/((1+eTr)*alpha*alpha); // formula (13.c)
+ Double_t c4 = TMath::Sqrt(k)*tantheta*(1-lambda)/(GapThick()*betaM); // formula (13.d)
+ Double_t dtdT = c1 * (c2+c3*c4);
+ Double_t trErr = RadThick()/(TMath::Sqrt(12.)*cost);
+
+ return trErr*dtdT;
+}//SigGeom()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff