[u/mrichter/AliRoot.git] / MUON / AliMUONv1.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpeateose. It is      *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------------------
// Class AliMUONv1
// --------------------
// AliDetector class for MUON subsystem which implements
// functions for simulation 
//-----------------------------------------------------------------------------

#include "AliMUONv1.h"
#include "AliMUONConstants.h"
#include "AliMUONResponseFactory.h"
#include "AliMUONHit.h"
#include "AliMUONGeometryBuilder.h"	
#include "AliMUONGeometry.h"	
#include "AliMUONGeometryTransformer.h"	
#include "AliMUONGeometryModule.h"	
#include "AliMUONStringIntMap.h"	
#include "AliMUONGeometryDetElement.h"	

#include "AliMpCDB.h"
#include "AliMpDEManager.h"

#include "AliConst.h" 
#include "AliMagF.h"
#include "AliRun.h"
#include "AliMC.h"
#include "AliTrackReference.h"
#include "AliLog.h"

#include <TRandom.h>
#include <TF1.h>
#include <TF2.h>
#include <TClonesArray.h>
#include <TRandom.h> 
#include <TVirtualMC.h>
#include <TGeoMatrix.h>

#include <string>

#include "AliMUONVHitStore.h"

/// \cond CLASSIMP
ClassImp(AliMUONv1)
/// \endcond
 
//___________________________________________
AliMUONv1::AliMUONv1() 
  : AliMUON(),
    fAngleEffect(kTRUE),
    fMagEffect(kTRUE),
    fStepMaxInActiveGas(0.6),
    fStepSum(0x0),
    fDestepSum(0x0),
    fTrackMomentum(), 
    fTrackPosition(),
    fElossRatio(0x0),
    fAngleEffect10(0x0),
    fAngleEffectNorma(0x0),
    fMagAngleEffectNorma(0x0)
{
/// Default constructor
  
  AliDebug(1,Form("default (empty) ctor this=%p",this));
} 

//___________________________________________
AliMUONv1::AliMUONv1(const char *name, const char* title)
: AliMUON(name, title), 
    fAngleEffect(kTRUE),
    fMagEffect(kTRUE),
    fStepMaxInActiveGas(0.6),
    fStepSum(0x0),
    fDestepSum(0x0),
    fTrackMomentum(), 
    fTrackPosition(),
    fElossRatio(0x0),
    fAngleEffect10(0x0),
    fAngleEffectNorma(0x0),
    fMagAngleEffectNorma(0x0)
{
/// Standard onstructor

    AliDebug(1,Form("ctor this=%p",this));	
	
    // Load mapping
    if ( ! AliMpCDB::LoadMpSegmentation() ) {
      AliFatal("Could not access mapping from OCDB !");
    }
       
    // By default include all stations

    fStepSum   = new Float_t [AliMUONConstants::NCh()];
    fDestepSum = new Float_t [AliMUONConstants::NCh()];
    for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
      fStepSum[i] =0.0;
      fDestepSum[i]=0.0;
    }
    // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
    fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.); 
    fElossRatio->SetParameter(0,1.02138);
    fElossRatio->SetParameter(1,-9.54149e-02);
    fElossRatio->SetParameter(2,+7.83433e-02); 
    fElossRatio->SetParameter(3,-9.98208e-03);
    fElossRatio->SetParameter(4,+3.83279e-04);

    // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
    fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0);
    fAngleEffect10->SetParameter(0, 1.90691e+02);
    fAngleEffect10->SetParameter(1,-6.62258e+01);
    fAngleEffect10->SetParameter(2,+1.28247e+01);
    // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)  
    // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
    fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0);
    fAngleEffectNorma->SetParameter(0,4.148);
    fAngleEffectNorma->SetParameter(1,-6.809e-01);
    fAngleEffectNorma->SetParameter(2,5.151e-02);
    fAngleEffectNorma->SetParameter(3,-1.490e-03);

    // Magnetic field effect: Normalisation form theta=16 degres (eq. 10 degrees B=0) to theta between -20 and 20 (Lamia Benhabib jun 2006 )  
    // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
    fMagAngleEffectNorma = new TF2("MagAngleEffectNorma","121.24/(([1]+[2]*abs(y))+[3]*abs(x-[0]*y)+[4]*abs((x-[0]*y)*(x-[0]*y))+[5]*abs((x-[0]*y)*(x-[0]*y)*(x-[0]*y))+[6]*abs((x-[0]*y)*(x-[0]*y)*(x-[0]*y)*(x-[0]*y)))",-20.0,20.0,-1.,1.);
    fMagAngleEffectNorma->SetParameters(8.6995, 25.4022, 13.8822, 2.4717, 1.1551, -0.0624, 0.0012);
}

//___________________________________________
AliMUONv1::~AliMUONv1()
{
/// Destructor
  
  AliDebug(1,Form("dtor this=%p",this));
  delete [] fStepSum;
  delete [] fDestepSum;
  delete fElossRatio;
  delete fAngleEffect10;
  delete fAngleEffectNorma; 
  delete fMagAngleEffectNorma;
}

//__________________________________________________
void AliMUONv1::CreateGeometry()
{
/// Construct geometry using geometry builder

  fGeometryBuilder->CreateGeometry();
}

//________________________________________________________________
void AliMUONv1::CreateMaterials()
{
/// Construct materials using geometry builder

  fGeometryBuilder->CreateMaterials();
}

//________________________________________________________________
void AliMUONv1::AddAlignableVolumes() const
{
/// Construct materials using geometry builder

  GetGeometryTransformer()->AddAlignableVolumes();
}


//___________________________________________
void AliMUONv1::Init()
{ 
/// Initialize geometry

  AliDebug(1,"Start Init for version 1 - CPC chamber type");
   
  fGeometryBuilder->InitGeometry();
  AliDebug(1,"Finished Init for version 1 - CPC chamber type");   
 

  // Build segmentation
  // using geometry parametrisation
  //
  // Build response
  //
  AliMUONResponseFactory respFactory("default", fIsTailEffect);
  respFactory.Build(this);
  
}

//__________________________________________________________________
Int_t  AliMUONv1::GetGeomModuleId(Int_t volId) const
{
/// Check if the volume with specified  volId is a sensitive volume (gas) 
/// of some chamber and return the chamber number;
/// if not sensitive volume - return 0.

  for (Int_t i = 0; i < AliMUONConstants::NGeomModules(); i++) {
    if ( GetGeometry()->GetModule(i)->IsSensitiveVolume(volId) )
      return i;
  }    

  return -1;
}

//_______________________________________________________________________________
TString  AliMUONv1::CurrentVolumePath() const
{
/// Return current volume path
/// (Could be removed when this function is available via gMC)

  TString path = "";
  TString name;
  Int_t copyNo;
  Int_t imother = 0;
  do {
    name = gMC->CurrentVolOffName(imother);
    gMC->CurrentVolOffID(imother++, copyNo);
    TString add = "/";
    add += name;
    add += "_";
    add += copyNo;
    path.Insert(0,add); 
  }
  while ( name != TString("ALIC") );
  
  return path;  
}

//_______________________________________________________________________________
void AliMUONv1::StepManager()
{
/// Step manager for the chambers

  // Only charged tracks
  if( !(gMC->TrackCharge()) ) return; 
  // Only charged tracks
  
  // Only gas gap inside chamber
  // Tag chambers and record hits when track enters 
  static Int_t   idvol=-1, iEnter = 0;
  Int_t   copy;
  const  Float_t kBig = 1.e10;
  static Double_t xyzEnter[3];

  //
  // Only gas gap inside chamber
  // Tag chambers and record hits when track enters 
  Int_t id=gMC->CurrentVolID(copy);
  Int_t iGeomModule = GetGeomModuleId(id);
  if (iGeomModule == -1) return;

  // Detection elements id
  const AliMUONGeometryModule* kGeometryModule
    = GetGeometry()->GetModule(iGeomModule);
  AliMUONGeometryDetElement* detElement
    = kGeometryModule->FindBySensitiveVolume(CurrentVolumePath());
    
  if (!detElement && iGeomModule < AliMUONConstants::NGeomModules()-2) {
    iGeomModule++;
    const AliMUONGeometryModule* kGeometryModule2
      = GetGeometry()->GetModule(iGeomModule);
    detElement 
      = kGeometryModule2->FindBySensitiveVolume(CurrentVolumePath());
  }    

  Int_t detElemId = 0;
  if (detElement) detElemId = detElement->GetUniqueID(); 
 
  if (!detElemId) {
    AliErrorStream() 
         << "Geometry module id: "
  	 << setw(3) << iGeomModule << "  "
  	 << "Current SV: " 
  	 <<  CurrentVolumePath() 
         << "  detElemId: "
  	 << setw(5) << detElemId 
         << endl;
    Double_t x, y, z;
    gMC->TrackPosition(x, y, z);	 
    AliErrorStream() 
         << "	global position: "
  	 << x << ", " << y << ", " << z
  	 << endl;
    AliErrorStream() << "DetElemId not identified." << endl;
  } 
  
  Int_t iChamber = AliMpDEManager::GetChamberId(detElemId) + 1; 
  idvol = iChamber -1;
    
  // Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers
  if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting() ) ) {
    AliTrackReference* trackReference    
      = AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kMUON);
    trackReference->SetUserId(detElemId);
  }  
  
  if( gMC->IsTrackEntering() ) {
     Float_t theta = fTrackMomentum.Theta();
     if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
     iEnter = 1;
     gMC->TrackPosition(xyzEnter[0], xyzEnter[1], xyzEnter[2]); // save coordinates of entrance point
  }

   //   AliDebug(1,
   //	    Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber,
   //		 ( (AliMUONChamber*)(*fChambers)[idvol])->Z())) ;
  // Particule id and mass, 
  Int_t     ipart = gMC->TrackPid();
  Float_t   mass  = gMC->TrackMass();

  fDestepSum[idvol]+=gMC->Edep();
  // Get current particle id (ipart), track position (pos)  and momentum (mom)
  if ( fStepSum[idvol]==0.0 )  gMC->TrackMomentum(fTrackMomentum);
  fStepSum[idvol]+=gMC->TrackStep();
  
  //  if (AliDebugLevel()) {
  //   AliDebug(1,Form("Step, iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
  //		     iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg,
  //	     mass, fStepSum[idvol], gMC->Edep()));
  // AliDebug(1,Form("Step:Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), 
  //	     fTrackMomentum.Z()));
  // gMC->TrackPosition(fTrackPosition);
  // AliDebug(1,Form("Step: Track Position %f %f %f",fTrackPosition.X(),
  //	     fTrackPosition.Y(),fTrackPosition.Z())) ;
  //}

  // Track left chamber or StepSum larger than fStepMaxInActiveGas
  if ( gMC->IsTrackExiting() || 
       gMC->IsTrackStop() || 
       gMC->IsTrackDisappeared()||
       (fStepSum[idvol]>fStepMaxInActiveGas) ) {
    
    if   ( gMC->IsTrackExiting() || 
           gMC->IsTrackStop() || 
           gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
    if (fDestepSum[idvol] == 0) {
      // AZ - no energy release
      fStepSum[idvol] = 0; // Reset for the next event
      iEnter = 0;
      return; 
    }

    gMC->TrackPosition(fTrackPosition);
    Float_t theta = fTrackMomentum.Theta();
    Float_t phi   = fTrackMomentum.Phi();
    
    Int_t merge = 0;
    Double_t xyz0[3]={0}, xyz1[3]={0}, tmp[3]={0};
    if (gMC->IsTrackExiting() && iEnter != 0) {
      // AZ - this code is to avoid artificial hit splitting at the
      // "fake" boundary inside the same chamber. It will still produce 
      // 2 hits but with the same coordinates (at the wire) to allow 
      // their merging at the digitization level.

      // Only for a track going from the entrance to the exit from the volume
      // Get local coordinates
      gMC->Gmtod(xyzEnter, xyz0, 1); // local coord. at the entrance

      fTrackPosition.Vect().GetXYZ(tmp);
      gMC->Gmtod(tmp, xyz1, 1); // local coord. at the exit
      Float_t dx = xyz0[0] - xyz1[0];
      Float_t dy = xyz0[1] - xyz1[1];
      Float_t thLoc = TMath::ATan2 (TMath::Sqrt(dx*dx+dy*dy), TMath::Abs(xyz0[2]-xyz1[2]));
      if (thLoc * TMath::RadToDeg() < 15) merge = 1; 
    }

    if (merge) {
      Double_t dz = -0.5;
      if (xyz1[2] != xyz0[2]) dz = xyz0[2] / (xyz1[2] - xyz0[2]);
      tmp[0] = xyz0[0] - (xyz1[0] - xyz0[0]) * dz; // local coord. at the wire
      tmp[1] = xyz0[1] - (xyz1[1] - xyz0[1]) * dz;
      tmp[2] = xyz0[2] - (xyz1[2] - xyz0[2]) * dz;
      gMC->Gdtom(tmp, xyz1, 1); // global coord. at the wire
      fTrackPosition.SetXYZT(xyz1[0], xyz1[1], xyz1[2], fTrackPosition.T());
    } else {
      TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
				 fStepSum[idvol]/2.*sin(theta)*sin(phi),
				 fStepSum[idvol]/2.*cos(theta),0.0       );
      fTrackPosition-=backToWire;
      //printf(" %d %d %d %f %d \n", gMC->IsTrackExiting(), gMC->IsTrackStop(), gMC->IsTrackDisappeared(), fStepSum[idvol], iEnter);
      //    AliDebug(1,
      //     Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()));
      // AliDebug(1,
      //     Form("Exit: Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z())) ;
    }
    
    //-------------- Angle effect 
    // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
    
    Float_t betaxGamma    = fTrackMomentum.P()/mass;//  pc/mc2
    Float_t sigmaEffect10degrees;
    Float_t sigmaEffectThetadegrees;
    Float_t eLossParticleELossMip;
    Float_t yAngleEffect=0.;
    Float_t thetawires      =  TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) ;// We use Pi-theta because z is negative
    Double_t bField[3] = {0};
    fTrackPosition.Vect().GetXYZ(tmp);
    gAlice->Field(tmp,bField);

    if (fAngleEffect && !fMagEffect){
      thetawires = TMath::Abs(thetawires);
    if ( (betaxGamma >3.2)   &&  (thetawires*kRaddeg<=15.) ) {
      betaxGamma=TMath::Log(betaxGamma);
      eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
      // 10 degrees is a reference for a model (arbitrary)
      sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
      // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
      sigmaEffectThetadegrees =  sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg);  // For 5mm gap  
      if ( (iChamber==1)  ||  (iChamber==2) )  
        sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
      yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
    }
    }
    else if (fAngleEffect && fMagEffect) {
      if ( (betaxGamma >3.2)   &&  (TMath::Abs(thetawires*kRaddeg)<=15.) ) {
	betaxGamma=TMath::Log(betaxGamma);
	eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
	// 10 degrees is a reference for a model (arbitrary)
	sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
	// Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
	sigmaEffectThetadegrees =  sigmaEffect10degrees/fMagAngleEffectNorma->Eval(thetawires*kRaddeg,bField[0]/10.);  // For 5mm gap  
      if ( (iChamber==1)  ||  (iChamber==2) )  
        sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
	yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
      }
    }

    AliMUONHit hit(fIshunt, 
		   gAlice->GetMCApp()->GetCurrentTrackNumber(), 
		   detElemId, ipart,
		   fTrackPosition.X(), 
		   fTrackPosition.Y()+yAngleEffect, 
		   fTrackPosition.Z(), 
		   gMC->TrackTime(),
		   fTrackMomentum.P(),
		   theta, 
		   phi, 
		   fStepSum[idvol], 
		   fDestepSum[idvol],                        
		   fTrackPosition.X(),
		   fTrackPosition.Y(),
		   fTrackPosition.Z());
    
    fHitStore->Add(hit);

    fStepSum[idvol]  =0; // Reset for the next event
    fDestepSum[idvol]=0; // Reset for the next event
    iEnter = 0;
  }
}
Commit	Line	Data
a9e2aefa	1	/**************************************************************************
a9e2aefa	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
0c527060	3	* *
a9e2aefa	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
2c799aa2	12	* about the suitability of this software for any purpeateose. It is *
a9e2aefa	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
88cb7938	16	/* $Id$ */
a9e2aefa	17
3d1463c8	18	//-----------------------------------------------------------------------------
d19b6003	19	// Class AliMUONv1
	20	// --------------------
	21	// AliDetector class for MUON subsystem which implements
	22	// functions for simulation
3d1463c8	23	//-----------------------------------------------------------------------------
acc838fd	24
30178c30	25	#include "AliMUONv1.h"
88cb7938	26	#include "AliMUONConstants.h"
b7ef3c96	27	#include "AliMUONResponseFactory.h"
a9e2aefa	28	#include "AliMUONHit.h"
d4bb94a1	29	#include "AliMUONGeometryBuilder.h"
b7ef3c96	30	#include "AliMUONGeometry.h"
b7ef3c96	31	#include "AliMUONGeometryTransformer.h"
e118b27e	32	#include "AliMUONGeometryModule.h"
7ecf374b	33	#include "AliMUONStringIntMap.h"
e118b27e	34	#include "AliMUONGeometryDetElement.h"
7ecf374b	35
331a617a	36	#include "AliMpCDB.h"
273e54a3	37	#include "AliMpDEManager.h"
273e54a3	38
7ecf374b	39	#include "AliConst.h"
88cb7938	40	#include "AliMagF.h"
88cb7938	41	#include "AliRun.h"
5d12ce38	42	#include "AliMC.h"
d95fe39e	43	#include "AliTrackReference.h"
8c343c7c	44	#include "AliLog.h"
a9e2aefa	45
7ecf374b	46	#include <TRandom.h>
7ecf374b	47	#include <TF1.h>
d7d39669	48	#include <TF2.h>
7ecf374b	49	#include <TClonesArray.h>
	50	#include <TRandom.h>
	51	#include <TVirtualMC.h>
	52	#include <TGeoMatrix.h>
	53
edee5e63	54	#include <string>
edee5e63	55
bb2bab35	56	#include "AliMUONVHitStore.h"
bb2bab35	57
5398f946	58	/// \cond CLASSIMP
a9e2aefa	59	ClassImp(AliMUONv1)
5398f946	60	/// \endcond
a9e2aefa	61
a9e2aefa	62	//___________________________________________
30178c30	63	AliMUONv1::AliMUONv1()
30178c30	64	: AliMUON(),
d4bb94a1	65	fAngleEffect(kTRUE),
d7d39669	66	fMagEffect(kTRUE),
d4bb94a1	67	fStepMaxInActiveGas(0.6),
	68	fStepSum(0x0),
	69	fDestepSum(0x0),
	70	fTrackMomentum(),
	71	fTrackPosition(),
	72	fElossRatio(0x0),
	73	fAngleEffect10(0x0),
d7d39669	74	fAngleEffectNorma(0x0),
d7d39669	75	fMagAngleEffectNorma(0x0)
a9e2aefa	76	{
d19b6003	77	/// Default constructor
	78
	79	AliDebug(1,Form("default (empty) ctor this=%p",this));
1391e633	80	}
d4bb94a1	81
a9e2aefa	82	//___________________________________________
9bf406e1	83	AliMUONv1::AliMUONv1(const char name, const char title)
9bf406e1	84	: AliMUON(name, title),
d4bb94a1	85	fAngleEffect(kTRUE),
d7d39669	86	fMagEffect(kTRUE),
d4bb94a1	87	fStepMaxInActiveGas(0.6),
	88	fStepSum(0x0),
	89	fDestepSum(0x0),
	90	fTrackMomentum(),
	91	fTrackPosition(),
	92	fElossRatio(0x0),
	93	fAngleEffect10(0x0),
d7d39669	94	fAngleEffectNorma(0x0),
d7d39669	95	fMagAngleEffectNorma(0x0)
a9e2aefa	96	{
d19b6003	97	/// Standard onstructor
d4bb94a1	98
d19b6003	99	AliDebug(1,Form("ctor this=%p",this));
edee5e63	100
331a617a	101	// Load mapping
	102	if ( ! AliMpCDB::LoadMpSegmentation() ) {
	103	AliFatal("Could not access mapping from OCDB !");
	104	}
	105
ba030c0e	106	// By default include all stations
c33d9661	107
1391e633	108	fStepSum = new Float_t [AliMUONConstants::NCh()];
	109	fDestepSum = new Float_t [AliMUONConstants::NCh()];
	110	for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
	111	fStepSum[i] =0.0;
	112	fDestepSum[i]=0.0;
	113	}
	114	// Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
	115	fElossRatio = new TF1("ElossRatio","[0]+[1]x+[2]xx+[3]xxx+[4]xxxx",0.5,5.);
	116	fElossRatio->SetParameter(0,1.02138);
	117	fElossRatio->SetParameter(1,-9.54149e-02);
	118	fElossRatio->SetParameter(2,+7.83433e-02);
	119	fElossRatio->SetParameter(3,-9.98208e-03);
	120	fElossRatio->SetParameter(4,+3.83279e-04);
	121
	122	// Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
	123	fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]x+[2]x*x",0.5,3.0);
	124	fAngleEffect10->SetParameter(0, 1.90691e+02);
	125	fAngleEffect10->SetParameter(1,-6.62258e+01);
	126	fAngleEffect10->SetParameter(2,+1.28247e+01);
	127	// Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
	128	// Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
	129	fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]x+[2]xx+[3]xxx",0.0,10.0);
	130	fAngleEffectNorma->SetParameter(0,4.148);
	131	fAngleEffectNorma->SetParameter(1,-6.809e-01);
	132	fAngleEffectNorma->SetParameter(2,5.151e-02);
	133	fAngleEffectNorma->SetParameter(3,-1.490e-03);
d7d39669	134
	135	// Magnetic field effect: Normalisation form theta=16 degres (eq. 10 degrees B=0) to theta between -20 and 20 (Lamia Benhabib jun 2006 )
	136	// Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
	137	fMagAngleEffectNorma = new TF2("MagAngleEffectNorma","121.24/(([1]+[2]abs(y))+[3]abs(x-[0]y)+[4]abs((x-[0]y)(x-[0]y))+[5]abs((x-[0]y)(x-[0]y)(x-[0]y))+[6]abs((x-[0]y)(x-[0]y)(x-[0]y)(x-[0]*y)))",-20.0,20.0,-1.,1.);
	138	fMagAngleEffectNorma->SetParameters(8.6995, 25.4022, 13.8822, 2.4717, 1.1551, -0.0624, 0.0012);
a9e2aefa	139	}
	140
	141	//___________________________________________
acc838fd	142	AliMUONv1::~AliMUONv1()
a9e2aefa	143	{
d19b6003	144	/// Destructor
	145
	146	AliDebug(1,Form("dtor this=%p",this));
d4bb94a1	147	delete [] fStepSum;
	148	delete [] fDestepSum;
	149	delete fElossRatio;
	150	delete fAngleEffect10;
8109731a	151	delete fAngleEffectNorma;
d7d39669	152	delete fMagAngleEffectNorma;
acc838fd	153	}
b17c0c87	154
acc838fd	155	//__________________________________________________
	156	void AliMUONv1::CreateGeometry()
	157	{
d19b6003	158	/// Construct geometry using geometry builder
a9e2aefa	159
d4bb94a1	160	fGeometryBuilder->CreateGeometry();
acc838fd	161	}
a9e2aefa	162
acc838fd	163	//________________________________________________________________
a9e2aefa	164	void AliMUONv1::CreateMaterials()
a9e2aefa	165	{
d19b6003	166	/// Construct materials using geometry builder
acc838fd	167
d4bb94a1	168	fGeometryBuilder->CreateMaterials();
a9e2aefa	169	}
a9e2aefa	170
c28b5041	171	//________________________________________________________________
	172	void AliMUONv1::AddAlignableVolumes() const
	173	{
	174	/// Construct materials using geometry builder
	175
	176	GetGeometryTransformer()->AddAlignableVolumes();
	177	}
	178
	179
acc838fd	180	//___________________________________________
a9e2aefa	181	void AliMUONv1::Init()
a713db22	182	{
d19b6003	183	/// Initialize geometry
d19b6003	184
edee5e63	185	AliDebug(1,"Start Init for version 1 - CPC chamber type");
002920d1	186
edee5e63	187	fGeometryBuilder->InitGeometry();
edee5e63	188	AliDebug(1,"Finished Init for version 1 - CPC chamber type");
b7ef3c96	189
b7ef3c96	190
b7ef3c96	191	// Build segmentation
	192	// using geometry parametrisation
	193	//
b7ef3c96	194	// Build response
edee5e63	195	//
43d7561d	196	AliMUONResponseFactory respFactory("default", fIsTailEffect);
b7ef3c96	197	respFactory.Build(this);
b7ef3c96	198
a9e2aefa	199	}
1391e633	200
d4bb94a1	201	//__________________________________________________________________
273e54a3	202	Int_t AliMUONv1::GetGeomModuleId(Int_t volId) const
d4bb94a1	203	{
d19b6003	204	/// Check if the volume with specified volId is a sensitive volume (gas)
5398f946	205	/// of some chamber and return the chamber number;
d19b6003	206	/// if not sensitive volume - return 0.
d4bb94a1	207
273e54a3	208	for (Int_t i = 0; i < AliMUONConstants::NGeomModules(); i++) {
b7ef3c96	209	if ( GetGeometry()->GetModule(i)->IsSensitiveVolume(volId) )
273e54a3	210	return i;
b7ef3c96	211	}
d4bb94a1	212
273e54a3	213	return -1;
d4bb94a1	214	}
333f7cda	215
	216	//_______________________________________________________________________________
	217	TString AliMUONv1::CurrentVolumePath() const
	218	{
d19b6003	219	/// Return current volume path
d19b6003	220	/// (Could be removed when this function is available via gMC)
333f7cda	221
	222	TString path = "";
	223	TString name;
	224	Int_t copyNo;
	225	Int_t imother = 0;
	226	do {
	227	name = gMC->CurrentVolOffName(imother);
	228	gMC->CurrentVolOffID(imother++, copyNo);
	229	TString add = "/";
	230	add += name;
7ecf374b	231	add += "_";
333f7cda	232	add += copyNo;
	233	path.Insert(0,add);
	234	}
	235	while ( name != TString("ALIC") );
	236
	237	return path;
	238	}
	239
1391e633	240	//_______________________________________________________________________________
c33d9661	241	void AliMUONv1::StepManager()
c33d9661	242	{
d19b6003	243	/// Step manager for the chambers
c33d9661	244
c33d9661	245	// Only charged tracks
d59b2ec3	246	if( !(gMC->TrackCharge()) ) return;
1391e633	247	// Only charged tracks
1391e633	248
c33d9661	249	// Only gas gap inside chamber
c33d9661	250	// Tag chambers and record hits when track enters
d95fe39e	251	static Int_t idvol=-1, iEnter = 0;
1391e633	252	Int_t copy;
1391e633	253	const Float_t kBig = 1.e10;
d95fe39e	254	static Double_t xyzEnter[3];
acc838fd	255
	256	//
	257	// Only gas gap inside chamber
	258	// Tag chambers and record hits when track enters
273e54a3	259	Int_t id=gMC->CurrentVolID(copy);
	260	Int_t iGeomModule = GetGeomModuleId(id);
	261	if (iGeomModule == -1) return;
acc838fd	262
d95fe39e	263	// Detection elements id
d95fe39e	264	const AliMUONGeometryModule* kGeometryModule
273e54a3	265	= GetGeometry()->GetModule(iGeomModule);
d95fe39e	266	AliMUONGeometryDetElement* detElement
d95fe39e	267	= kGeometryModule->FindBySensitiveVolume(CurrentVolumePath());
273e54a3	268
	269	if (!detElement && iGeomModule < AliMUONConstants::NGeomModules()-2) {
	270	iGeomModule++;
	271	const AliMUONGeometryModule* kGeometryModule2
	272	= GetGeometry()->GetModule(iGeomModule);
	273	detElement
	274	= kGeometryModule2->FindBySensitiveVolume(CurrentVolumePath());
	275	}
374ebd7d	276
d95fe39e	277	Int_t detElemId = 0;
d95fe39e	278	if (detElement) detElemId = detElement->GetUniqueID();
333f7cda	279
d95fe39e	280	if (!detElemId) {
273e54a3	281	AliErrorStream()
	282	<< "Geometry module id: "
	283	<< setw(3) << iGeomModule << " "
d95fe39e	284	<< "Current SV: "
	285	<< CurrentVolumePath()
	286	<< " detElemId: "
	287	<< setw(5) << detElemId
	288	<< endl;
	289	Double_t x, y, z;
	290	gMC->TrackPosition(x, y, z);
273e54a3	291	AliErrorStream()
273e54a3	292	<< " global position: "
d95fe39e	293	<< x << ", " << y << ", " << z
d95fe39e	294	<< endl;
273e54a3	295	AliErrorStream() << "DetElemId not identified." << endl;
	296	}
	297
	298	Int_t iChamber = AliMpDEManager::GetChamberId(detElemId) + 1;
	299	idvol = iChamber -1;
333f7cda	300
d59b2ec3	301	// Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers
d95fe39e	302	if ( (gMC->IsTrackEntering() \|\| gMC->IsTrackExiting() ) ) {
d95fe39e	303	AliTrackReference* trackReference
e6add757	304	= AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kMUON);
d95fe39e	305	trackReference->SetUserId(detElemId);
d95fe39e	306	}
d59b2ec3	307
d95fe39e	308	if( gMC->IsTrackEntering() ) {
d59b2ec3	309	Float_t theta = fTrackMomentum.Theta();
d59b2ec3	310	if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
c5ce4e69	311	iEnter = 1;
c5ce4e69	312	gMC->TrackPosition(xyzEnter[0], xyzEnter[1], xyzEnter[2]); // save coordinates of entrance point
d59b2ec3	313	}
d59b2ec3	314
5a0e88a7	315	// AliDebug(1,
	316	// Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber,
	317	// ( (AliMUONChamber)(fChambers)[idvol])->Z())) ;
d59b2ec3	318	// Particule id and mass,
	319	Int_t ipart = gMC->TrackPid();
	320	Float_t mass = gMC->TrackMass();
	321
	322	fDestepSum[idvol]+=gMC->Edep();
	323	// Get current particle id (ipart), track position (pos) and momentum (mom)
	324	if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum);
	325	fStepSum[idvol]+=gMC->TrackStep();
	326
5a0e88a7	327	// if (AliDebugLevel()) {
	328	// AliDebug(1,Form("Step, iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
	329	// iChamber,ipart, fTrackMomentum.Theta()kRaddeg, fTrackMomentum.Phi()kRaddeg,
	330	// mass, fStepSum[idvol], gMC->Edep()));
	331	// AliDebug(1,Form("Step:Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(),
	332	// fTrackMomentum.Z()));
	333	// gMC->TrackPosition(fTrackPosition);
	334	// AliDebug(1,Form("Step: Track Position %f %f %f",fTrackPosition.X(),
	335	// fTrackPosition.Y(),fTrackPosition.Z())) ;
	336	//}
d59b2ec3	337
	338	// Track left chamber or StepSum larger than fStepMaxInActiveGas
	339	if ( gMC->IsTrackExiting() \|\|
	340	gMC->IsTrackStop() \|\|
	341	gMC->IsTrackDisappeared()\|\|
	342	(fStepSum[idvol]>fStepMaxInActiveGas) ) {
	343
	344	if ( gMC->IsTrackExiting() \|\|
	345	gMC->IsTrackStop() \|\|
	346	gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
c5ce4e69	347	if (fDestepSum[idvol] == 0) {
	348	// AZ - no energy release
	349	fStepSum[idvol] = 0; // Reset for the next event
	350	iEnter = 0;
	351	return;
	352	}
d59b2ec3	353
	354	gMC->TrackPosition(fTrackPosition);
	355	Float_t theta = fTrackMomentum.Theta();
	356	Float_t phi = fTrackMomentum.Phi();
	357
795b3f56	358	Int_t merge = 0;
795b3f56	359	Double_t xyz0[3]={0}, xyz1[3]={0}, tmp[3]={0};
c5ce4e69	360	if (gMC->IsTrackExiting() && iEnter != 0) {
	361	// AZ - this code is to avoid artificial hit splitting at the
	362	// "fake" boundary inside the same chamber. It will still produce
	363	// 2 hits but with the same coordinates (at the wire) to allow
	364	// their merging at the digitization level.
	365
	366	// Only for a track going from the entrance to the exit from the volume
	367	// Get local coordinates
c5ce4e69	368	gMC->Gmtod(xyzEnter, xyz0, 1); // local coord. at the entrance
	369
	370	fTrackPosition.Vect().GetXYZ(tmp);
	371	gMC->Gmtod(tmp, xyz1, 1); // local coord. at the exit
795b3f56	372	Float_t dx = xyz0[0] - xyz1[0];
	373	Float_t dy = xyz0[1] - xyz1[1];
	374	Float_t thLoc = TMath::ATan2 (TMath::Sqrt(dxdx+dydy), TMath::Abs(xyz0[2]-xyz1[2]));
	375	if (thLoc * TMath::RadToDeg() < 15) merge = 1;
	376	}
c5ce4e69	377
795b3f56	378	if (merge) {
c5ce4e69	379	Double_t dz = -0.5;
	380	if (xyz1[2] != xyz0[2]) dz = xyz0[2] / (xyz1[2] - xyz0[2]);
	381	tmp[0] = xyz0[0] - (xyz1[0] - xyz0[0]) * dz; // local coord. at the wire
	382	tmp[1] = xyz0[1] - (xyz1[1] - xyz0[1]) * dz;
	383	tmp[2] = xyz0[2] - (xyz1[2] - xyz0[2]) * dz;
	384	gMC->Gdtom(tmp, xyz1, 1); // global coord. at the wire
	385	fTrackPosition.SetXYZT(xyz1[0], xyz1[1], xyz1[2], fTrackPosition.T());
	386	} else {
	387	TLorentzVector backToWire( fStepSum[idvol]/2.sin(theta)cos(phi),
	388	fStepSum[idvol]/2.sin(theta)sin(phi),
	389	fStepSum[idvol]/2.*cos(theta),0.0 );
	390	fTrackPosition-=backToWire;
	391	//printf(" %d %d %d %f %d \n", gMC->IsTrackExiting(), gMC->IsTrackStop(), gMC->IsTrackDisappeared(), fStepSum[idvol], iEnter);
	392	// AliDebug(1,
	393	// Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()));
	394	// AliDebug(1,
	395	// Form("Exit: Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z())) ;
	396	}
d59b2ec3	397
	398	//-------------- Angle effect
	399	// Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
	400
	401	Float_t betaxGamma = fTrackMomentum.P()/mass;// pc/mc2
	402	Float_t sigmaEffect10degrees;
	403	Float_t sigmaEffectThetadegrees;
	404	Float_t eLossParticleELossMip;
	405	Float_t yAngleEffect=0.;
d7d39669	406	Float_t thetawires = TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) ;// We use Pi-theta because z is negative
	407	Double_t bField[3] = {0};
	408	fTrackPosition.Vect().GetXYZ(tmp);
	409	gAlice->Field(tmp,bField);
d59b2ec3	410
d7d39669	411	if (fAngleEffect && !fMagEffect){
d7d39669	412	thetawires = TMath::Abs(thetawires);
d59b2ec3	413	if ( (betaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) {
	414	betaxGamma=TMath::Log(betaxGamma);
	415	eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
	416	// 10 degrees is a reference for a model (arbitrary)
	417	sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
	418	// Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
	419	sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap
	420	if ( (iChamber==1) \|\| (iChamber==2) )
	421	sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02(thetawireskRaddeg)); // The gap is different (4mm)
	422	yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
	423	}
	424	}
d7d39669	425	else if (fAngleEffect && fMagEffect) {
	426	if ( (betaxGamma >3.2) && (TMath::Abs(thetawires*kRaddeg)<=15.) ) {
	427	betaxGamma=TMath::Log(betaxGamma);
	428	eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
	429	// 10 degrees is a reference for a model (arbitrary)
	430	sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
	431	// Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
	432	sigmaEffectThetadegrees = sigmaEffect10degrees/fMagAngleEffectNorma->Eval(thetawires*kRaddeg,bField[0]/10.); // For 5mm gap
	433	if ( (iChamber==1) \|\| (iChamber==2) )
	434	sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02(thetawireskRaddeg)); // The gap is different (4mm)
	435	yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
	436	}
	437	}
d59b2ec3	438
d7d39669	439	AliMUONHit hit(fIshunt,
	440	gAlice->GetMCApp()->GetCurrentTrackNumber(),
	441	detElemId, ipart,
	442	fTrackPosition.X(),
	443	fTrackPosition.Y()+yAngleEffect,
	444	fTrackPosition.Z(),
	445	gMC->TrackTime(),
	446	fTrackMomentum.P(),
	447	theta,
	448	phi,
	449	fStepSum[idvol],
	450	fDestepSum[idvol],
	451	fTrackPosition.X(),
	452	fTrackPosition.Y(),
	453	fTrackPosition.Z());
	454
bb2bab35	455	fHitStore->Add(hit);
5a0e88a7	456
d59b2ec3	457	fStepSum[idvol] =0; // Reset for the next event
d59b2ec3	458	fDestepSum[idvol]=0; // Reset for the next event
c5ce4e69	459	iEnter = 0;
d59b2ec3	460	}
d59b2ec3	461	}