[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 <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),
    fStepMaxInActiveGas(0.6),
    fStepSum(0x0),
    fDestepSum(0x0),
    fTrackMomentum(), 
    fTrackPosition(),
    fElossRatio(0x0),
    fAngleEffect10(0x0),
    fAngleEffectNorma(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),
    fStepMaxInActiveGas(0.6),
    fStepSum(0x0),
    fDestepSum(0x0),
    fTrackMomentum(), 
    fTrackPosition(),
    fElossRatio(0x0),
    fAngleEffect10(0x0),
    fAngleEffectNorma(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);
}

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

//__________________________________________________
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");
  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::Abs( TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) );// We use Pi-theta because z is negative


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