G4VRangeToEnergyConverter Class Reference

#include <G4VRangeToEnergyConverter.hh>

Inheritance diagram for G4VRangeToEnergyConverter:

Collaboration diagram for G4VRangeToEnergyConverter:

Public Member Functions
	G4VRangeToEnergyConverter ()
	G4VRangeToEnergyConverter (const G4VRangeToEnergyConverter &right)
G4VRangeToEnergyConverter &	operator= (const G4VRangeToEnergyConverter &right)
virtual	~G4VRangeToEnergyConverter ()
G4int	operator== (const G4VRangeToEnergyConverter &right) const
G4int	operator!= (const G4VRangeToEnergyConverter &right) const
virtual G4double	Convert (G4double rangeCut, const G4Material *material)
const G4ParticleDefinition *	GetParticleType () const
const G4PhysicsTable *	GetLossTable () const
virtual void	Reset ()
void	SetVerboseLevel (G4int value)
G4int	GetVerboseLevel () const

Static Public Member Functions
static void	SetEnergyRange (G4double lowedge, G4double highedge)
static G4double	GetLowEdgeEnergy ()
static G4double	GetHighEdgeEnergy ()
static G4double	GetMaxEnergyCut ()
static void	SetMaxEnergyCut (G4double value)

Protected Types
typedef G4PhysicsTable	G4LossTable
typedef G4PhysicsLogVector	G4LossVector
typedef G4PhysicsLogVector	G4RangeVector

Protected Member Functions
virtual void	BuildLossTable ()
virtual G4double	ComputeLoss (G4double AtomicNumber, G4double KineticEnergy)=0
virtual void	BuildRangeVector (const G4Material *aMaterial, G4RangeVector *rangeVector)
G4double	ConvertCutToKineticEnergy (G4RangeVector *theRangeVector, G4double theCutInLength, size_t materialIndex) const

Protected Attributes
G4double	fMaxEnergyCut
const G4ParticleDefinition *	theParticle
G4LossTable *	theLossTable
G4int	NumberOfElements
const G4int	TotBin
std::vector< G4RangeVector * >	fRangeVectorStore

Static Protected Attributes
static G4double	LowestEnergy = 0.99e-3*MeV
static G4double	HighestEnergy = 100.0e6*MeV
static G4double	MaxEnergyCut = 10.0*GeV

Detailed Description

Definition at line 58 of file G4VRangeToEnergyConverter.hh.

Member Typedef Documentation

typedef G4PhysicsTable G4VRangeToEnergyConverter::G4LossTable

protected

Definition at line 115 of file G4VRangeToEnergyConverter.hh.

typedef G4PhysicsLogVector G4VRangeToEnergyConverter::G4LossVector

protected

Definition at line 119 of file G4VRangeToEnergyConverter.hh.

typedef G4PhysicsLogVector G4VRangeToEnergyConverter::G4RangeVector

protected

Definition at line 131 of file G4VRangeToEnergyConverter.hh.

Constructor & Destructor Documentation

G4VRangeToEnergyConverter::G4VRangeToEnergyConverter

(

)

Definition at line 48 of file G4VRangeToEnergyConverter.cc.

                                                    :
  theParticle(0), theLossTable(0), NumberOfElements(0), TotBin(300),
  verboseLevel(1)
{
  fMaxEnergyCut = 0.;
}

G4VRangeToEnergyConverter::G4VRangeToEnergyConverter

(

const G4VRangeToEnergyConverter &

right

)

Definition at line 55 of file G4VRangeToEnergyConverter.cc.

                                                                                           :  theParticle(right.theParticle), theLossTable(0), TotBin(right.TotBin)
{
  fMaxEnergyCut = 0.;
  if (theLossTable) {
    theLossTable->clearAndDestroy();
    delete theLossTable;
    theLossTable=0;
  }
  *this = right;
}

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G4VRangeToEnergyConverter::~G4VRangeToEnergyConverter ( )

virtual

Definition at line 117 of file G4VRangeToEnergyConverter.cc.

{ 
  Reset();
  // Comment out Reset() for MT application  


}

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Member Function Documentation

void G4VRangeToEnergyConverter::BuildLossTable ( )

protectedvirtual

Definition at line 293 of file G4VRangeToEnergyConverter.cc.

{
  if (size_t(NumberOfElements) == G4Element::GetNumberOfElements()) return;
  
  // clear Loss table and Range vectors
  Reset();

  //  Build dE/dx tables for elements
  NumberOfElements = G4Element::GetNumberOfElements();
  theLossTable = new G4LossTable();
  theLossTable->reserve(G4Element::GetNumberOfElements());
#ifdef G4VERBOSE
  if (GetVerboseLevel()>3) {
    G4cout << "G4VRangeToEnergyConverter::BuildLossTable() ";
    G4cout << "Create theLossTable[" << theLossTable << "]";
    G4cout << " NumberOfElements=" << NumberOfElements <<G4endl;
  }
#endif
  
  
  // fill the loss table
  for (size_t j=0; j<size_t(NumberOfElements); j++){
    G4double Value;
    G4LossVector* aVector= 0;
    aVector= new G4LossVector(LowestEnergy, MaxEnergyCut, TotBin);
    for (size_t i=0; i<=size_t(TotBin); i++) {
      Value = ComputeLoss(  (*G4Element::GetElementTable())[j]->GetZ(),
                aVector->Energy(i)
                );
      aVector->PutValue(i,Value);
    }
    theLossTable->insert(aVector);
  }
}

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void G4VRangeToEnergyConverter::BuildRangeVector ( const G4Material *  aMaterial, G4RangeVector *  rangeVector  )

protectedvirtual

Reimplemented in G4RToEConvForGamma.

Definition at line 331 of file G4VRangeToEnergyConverter.cc.

{
  //  create range vector for a material
  const G4ElementVector* elementVector = aMaterial->GetElementVector();
  const G4double* atomicNumDensityVector = aMaterial->GetAtomicNumDensityVector();
  G4int NumEl = aMaterial->GetNumberOfElements();

  // calculate parameters of the low energy part first
  size_t i;
  std::vector<G4double> lossV;
  for ( size_t ib=0; ib<=size_t(TotBin); ib++) {
    G4double loss=0.;
    for (i=0; i<size_t(NumEl); i++) {
      G4int IndEl = (*elementVector)[i]->GetIndex();
      loss += atomicNumDensityVector[i]*
            (*((*theLossTable)[IndEl]))[ib];
    }
    lossV.push_back(loss);
  }
   
  // Integrate with Simpson formula with logarithmic binning
  G4double dltau = 1.0;
  if (LowestEnergy>0.) {
      G4double ltt =std::log(MaxEnergyCut/LowestEnergy);
      dltau = ltt/TotBin;
  }

  G4double s0 = 0.;
  G4double Value;
  for ( i=0; i<=size_t(TotBin); i++) {
    G4double t = rangeVector->GetLowEdgeEnergy(i);
    G4double q = t/lossV[i];
    if (i==0) s0 += 0.5*q;
    else s0 += q;
    
    if (i==0) {
       Value = (s0 + 0.5*q)*dltau ;
    } else {
      Value = (s0 - 0.5*q)*dltau ;
    }
    rangeVector->PutValue(i,Value);
  }
} 

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virtual G4double G4VRangeToEnergyConverter::ComputeLoss ( G4double  AtomicNumber, G4double  KineticEnergy  )

protectedpure virtual

Implemented in G4RToEConvForProton, G4RToEConvForGamma, G4RToEConvForElectron, and G4RToEConvForPositron.

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G4double G4VRangeToEnergyConverter::Convert ( G4double  rangeCut, const G4Material *  material  )

virtual

Reimplemented in G4RToEConvForProton.

Definition at line 148 of file G4VRangeToEnergyConverter.cc.

{
#ifdef G4VERBOSE
    if (GetVerboseLevel()>3) {
      G4cout << "G4VRangeToEnergyConverter::Convert() ";
      G4cout << "Convert for " << material->GetName() 
         << " with Range Cut " << rangeCut/mm << "[mm]" << G4endl;
    }
#endif

  G4double theKineticEnergyCuts = 0.;

  if (fMaxEnergyCut != MaxEnergyCut) {
    fMaxEnergyCut = MaxEnergyCut;      
    // clear loss table and renge vectors
    Reset();
  }
 
  // Build the energy loss table
  BuildLossTable();
  
  // Build range vector for every material, convert cut into energy-cut,
  // fill theKineticEnergyCuts and delete the range vector
  static const G4double tune = 0.025*mm*g/cm3 ,lowen = 30.*keV ; 

  // check density
  G4double density = material->GetDensity() ;
  if(density <= 0.) {
#ifdef G4VERBOSE
    if (GetVerboseLevel()>0) {
      G4cout << "G4VRangeToEnergyConverter::Convert() ";
      G4cout << material->GetName() << "has zero density "
         << "( " << density << ")" << G4endl;
    }
#endif
    return 0.;
  }
 
   // initialize RangeVectorStore
  const G4MaterialTable* table = G4Material::GetMaterialTable();
  G4int ext_size = table->size() - fRangeVectorStore.size();
  for (int i=0; i<ext_size; i++) fRangeVectorStore.push_back(0);
  
  // Build Range Vector
  G4int idx = material->GetIndex(); 
  G4RangeVector* rangeVector = fRangeVectorStore.at(idx);
  if (rangeVector == 0) {
    rangeVector = new G4RangeVector(LowestEnergy, MaxEnergyCut, TotBin); 
    BuildRangeVector(material, rangeVector);
    fRangeVectorStore.at(idx) = rangeVector;
  }

  // Convert Range Cut ro Kinetic Energy Cut 
  theKineticEnergyCuts = ConvertCutToKineticEnergy(rangeVector, rangeCut, idx);
  
  if( ((theParticle->GetParticleName()=="e-")||(theParticle->GetParticleName()=="e+"))
      && (theKineticEnergyCuts < lowen) ) {
    //  corr. should be switched on smoothly   
    theKineticEnergyCuts /= (1.+(1.-theKineticEnergyCuts/lowen)*
                 tune/(rangeCut*density)); 
  }
  
  if(theKineticEnergyCuts < LowestEnergy) {
    theKineticEnergyCuts = LowestEnergy ;
  } else if(theKineticEnergyCuts > MaxEnergyCut) {
    theKineticEnergyCuts = MaxEnergyCut;
  }
  
  return theKineticEnergyCuts;
}

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G4double G4VRangeToEnergyConverter::ConvertCutToKineticEnergy ( G4RangeVector *  theRangeVector, G4double  theCutInLength, size_t  materialIndex  ) const

protected

Definition at line 379 of file G4VRangeToEnergyConverter.cc.

{
  const G4double epsilon=0.01;

  //  find max. range and the corresponding energy (rmax,Tmax)
  G4double rmax= -1.e10*mm;

  G4double T1 = LowestEnergy;
  G4double r1 =(*rangeVector)[0] ;

  G4double T2 = MaxEnergyCut;

  // check theCutInLength < r1 
  if ( theCutInLength <= r1 ) {  return T1; }

  // scan range vector to find nearest bin 
  // ( suppose that r(Ti) > r(Tj) if Ti >Tj )
  for (size_t ibin=0; ibin<=size_t(TotBin); ibin++) {
    G4double T=rangeVector->GetLowEdgeEnergy(ibin);
    G4double r=(*rangeVector)[ibin];
    if ( r>rmax )   rmax=r;
    if (r <theCutInLength ) {
      T1 = T;
      r1 = r;
    } else if (r >theCutInLength ) {
      T2 = T;
      break;
    }
  }

  // check cut in length is smaller than range max
  if ( theCutInLength >= rmax )  {
#ifdef G4VERBOSE
    if (GetVerboseLevel()>2) {
      G4cout << "G4VRangeToEnergyConverter::ConvertCutToKineticEnergy ";
      G4cout << "  for " << theParticle->GetParticleName() << G4endl;
      G4cout << "The cut in range [" << theCutInLength/mm << " (mm)]  ";
      G4cout << " is too big  " ;
      G4cout << " for material  idx=" << materialIndex <<G4endl; 
    }
#endif
    return  MaxEnergyCut;
  }
  
  // convert range to energy
  G4double T3 = std::sqrt(T1*T2);
  G4double r3 = rangeVector->Value(T3);
  const size_t MAX_LOOP = 1000; 
  for (size_t loop_count=0; loop_count<MAX_LOOP; ++loop_count){
    if (std::fabs(1.-r3/theCutInLength)<epsilon ) break;
    if ( theCutInLength <= r3 ) {
      T2 = T3;
    } else {
      T1 = T3;
    }
    T3 = std::sqrt(T1*T2);
    r3 = rangeVector->Value(T3);
  }

  return T3;
}

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G4double G4VRangeToEnergyConverter::GetHighEdgeEnergy ( )

static

Definition at line 249 of file G4VRangeToEnergyConverter.cc.

{
  return HighestEnergy;
}

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const G4PhysicsTable* G4VRangeToEnergyConverter::GetLossTable

(

)

const

G4double G4VRangeToEnergyConverter::GetLowEdgeEnergy ( )

static

Definition at line 243 of file G4VRangeToEnergyConverter.cc.

{
  return LowestEnergy;
}

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G4double G4VRangeToEnergyConverter::GetMaxEnergyCut ( )

static

Definition at line 257 of file G4VRangeToEnergyConverter.cc.

{
  return MaxEnergyCut;
}

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const G4ParticleDefinition * G4VRangeToEnergyConverter::GetParticleType ( ) const

inline

Definition at line 172 of file G4VRangeToEnergyConverter.hh.

{
   return theParticle;
}

G4int G4VRangeToEnergyConverter::GetVerboseLevel ( ) const

inline

Definition at line 165 of file G4VRangeToEnergyConverter.hh.

{
   return verboseLevel;
}

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G4int G4VRangeToEnergyConverter::operator!=

(

const G4VRangeToEnergyConverter &

right

)

const

Definition at line 139 of file G4VRangeToEnergyConverter.cc.

{
  return this != &right;
}

G4VRangeToEnergyConverter & G4VRangeToEnergyConverter::operator=

(

const G4VRangeToEnergyConverter &

right

)

Definition at line 66 of file G4VRangeToEnergyConverter.cc.

{
  if (this == &right) return *this;
  if (theLossTable) {
    theLossTable->clearAndDestroy();
    delete theLossTable;
    theLossTable=0;
 }

  fMaxEnergyCut = right.fMaxEnergyCut;
  NumberOfElements = right.NumberOfElements;
  theParticle = right.theParticle;
  verboseLevel = right.verboseLevel;
  
  // create the loss table
  theLossTable = new G4LossTable();
  theLossTable->reserve(G4Element::GetNumberOfElements());  
  // fill the loss table
  for (size_t j=0; j<size_t(NumberOfElements); j++){
    G4LossVector* aVector = new G4LossVector(LowestEnergy, MaxEnergyCut, TotBin);
    for (size_t i=0; i<=size_t(TotBin); i++) {
      G4double Value = (*((*right.theLossTable)[j]))[i];
      aVector->PutValue(i,Value);
    }
    theLossTable->insert(aVector);
  }

  // clean up range vector store
  for (size_t idx=0; idx<fRangeVectorStore.size(); idx++){
    delete fRangeVectorStore.at(idx);
  }
  fRangeVectorStore.clear();

  // copy range vector store
  for (size_t j=0; j<((right.fRangeVectorStore).size()); j++){
    G4RangeVector* vector = (right.fRangeVectorStore).at(j);
    G4RangeVector* rangeVector = 0; 
    if (vector !=0 ) {
      rangeVector = new G4RangeVector(LowestEnergy, MaxEnergyCut, TotBin);
      fMaxEnergyCut = MaxEnergyCut;   
      for (size_t i=0; i<=size_t(TotBin); i++) {
    G4double Value = (*vector)[i];
    rangeVector->PutValue(i,Value);
      }
    }
    fRangeVectorStore.push_back(rangeVector);
  }
  return *this;
}

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G4int G4VRangeToEnergyConverter::operator==

(

const G4VRangeToEnergyConverter &

right

)

const

Definition at line 134 of file G4VRangeToEnergyConverter.cc.

{
  return this == &right;
}

void G4VRangeToEnergyConverter::Reset ( )

virtual

Reimplemented in G4RToEConvForProton.

Definition at line 270 of file G4VRangeToEnergyConverter.cc.

{
  // delete loss table
  if (theLossTable) {  
    theLossTable->clearAndDestroy();
    delete theLossTable;
  }
  theLossTable=0;
  NumberOfElements=0;
  
  //clear RangeVectorStore
  for (size_t idx=0; idx<fRangeVectorStore.size(); idx++){
    delete fRangeVectorStore.at(idx);
  }
  fRangeVectorStore.clear();
} 

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void G4VRangeToEnergyConverter::SetEnergyRange ( G4double  lowedge, G4double  highedge  )

static

Definition at line 223 of file G4VRangeToEnergyConverter.cc.

{
  // check LowestEnergy/ HighestEnergy 
  if ( (lowedge<0.0)||(highedge<=lowedge) ){
#ifdef G4VERBOSE
    G4cerr << "Error in G4VRangeToEnergyConverter::SetEnergyRange";
    G4cerr << " :  illegal energy range" << "(" << lowedge/GeV;
    G4cerr << "," << highedge/GeV << ") [GeV]" << G4endl;
#endif
    G4Exception( "G4VRangeToEnergyConverter::SetEnergyRange()",
         "ProcCuts101",
         JustWarning, "Illegal energy range ");
  } else {
    LowestEnergy = lowedge;
    HighestEnergy = highedge;
  }
}

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void G4VRangeToEnergyConverter::SetMaxEnergyCut ( G4double  value )

static

Definition at line 262 of file G4VRangeToEnergyConverter.cc.

{
  MaxEnergyCut = value;
}

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void G4VRangeToEnergyConverter::SetVerboseLevel ( G4int  value )

inline

Definition at line 159 of file G4VRangeToEnergyConverter.hh.

{
   verboseLevel = value;
}

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Member Data Documentation

G4double G4VRangeToEnergyConverter::fMaxEnergyCut

protected

Definition at line 112 of file G4VRangeToEnergyConverter.hh.

std::vector< G4RangeVector* > G4VRangeToEnergyConverter::fRangeVectorStore

protected

Definition at line 136 of file G4VRangeToEnergyConverter.hh.

G4double G4VRangeToEnergyConverter::HighestEnergy = 100.0e6*MeV

staticprotected

Definition at line 110 of file G4VRangeToEnergyConverter.hh.

G4double G4VRangeToEnergyConverter::LowestEnergy = 0.99e-3*MeV

staticprotected

Definition at line 110 of file G4VRangeToEnergyConverter.hh.

G4double G4VRangeToEnergyConverter::MaxEnergyCut = 10.0*GeV

staticprotected

Definition at line 111 of file G4VRangeToEnergyConverter.hh.

G4int G4VRangeToEnergyConverter::NumberOfElements

protected

Definition at line 117 of file G4VRangeToEnergyConverter.hh.

G4LossTable* G4VRangeToEnergyConverter::theLossTable

protected

Definition at line 116 of file G4VRangeToEnergyConverter.hh.

const G4ParticleDefinition* G4VRangeToEnergyConverter::theParticle

protected

Definition at line 114 of file G4VRangeToEnergyConverter.hh.

const G4int G4VRangeToEnergyConverter::TotBin

protected

Definition at line 120 of file G4VRangeToEnergyConverter.hh.

---

The documentation for this class was generated from the following files:

• source/geant4.10.03.p03/source/processes/cuts/include/G4VRangeToEnergyConverter.hh
• source/geant4.10.03.p03/source/processes/cuts/src/G4VRangeToEnergyConverter.cc