Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/physics_lists/constructors/limiters/src/G4MinEkineCuts.cc

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 17 // *                                                                  *
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 25 //
 26 //
 27 //
 28 // 
 29 // --------------------------------------------------------------
 30 //  GEANT 4 class implementation file 
 31 // --------------------------------------------------------------
 32 //                   15 April 1998 M.Maire
 33 // --------------------------------------------------------------
 34 
 35 #include "G4MinEkineCuts.hh"
 36 
 37 #include "G4Step.hh"
 38 #include "G4UserLimits.hh"
 39 #include "G4VParticleChange.hh"
 40 #include "G4EnergyLossTables.hh"
 41 
 42 G4MinEkineCuts::G4MinEkineCuts(const G4String& aName)
 43   : G4SpecialCuts(aName)
 44 {
 45    if (verboseLevel>1) {
 46      G4cout << GetProcessName() << " is created "<< G4endl;
 47    }
 48 }
 49 
 50 G4MinEkineCuts::~G4MinEkineCuts()
 51 {}
 52 
 53 G4MinEkineCuts::G4MinEkineCuts(G4MinEkineCuts& ) : G4SpecialCuts()
 54 {}
 55 
 56  
 57 G4double G4MinEkineCuts::PostStepGetPhysicalInteractionLength(
 58                              const G4Track& aTrack,
 59            G4double ,
 60            G4ForceCondition* condition
 61           )
 62 {
 63   // condition is set to "Not Forced"
 64   *condition = NotForced;
 65 
 66    G4double     proposedStep = DBL_MAX;
 67    // get the pointer to UserLimits
 68    G4UserLimits* pUserLimits = aTrack.GetVolume()->GetLogicalVolume()->GetUserLimits();
 69    const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
 70    G4ParticleDefinition* aParticleDef = aTrack.GetDefinition();
 71   
 72    if (pUserLimits && aParticleDef->GetPDGCharge() != 0.0) {
 73      //min kinetic energy
 74      G4double temp = DBL_MAX;
 75      G4double    eKine     = aParticle->GetKineticEnergy();
 76      const G4MaterialCutsCouple* couple = aTrack.GetMaterialCutsCouple();
 77      G4double eMin = pUserLimits->GetUserMinEkine(aTrack);
 78 
 79      G4double    rangeNow = DBL_MAX;
 80 
 81      rangeNow = G4EnergyLossTables::GetRange(aParticleDef,eKine,couple);
 82 
 83      if (eKine < eMin ) {
 84        proposedStep = 0.;
 85      } else {
 86        // charged particles only
 87        G4double rangeMin = G4EnergyLossTables::GetRange(aParticleDef,eMin,couple);
 88        temp = rangeNow - rangeMin;
 89        if (proposedStep > temp) proposedStep = temp;        
 90      }
 91    }
 92    return proposedStep;
 93 }
 94