underground_physics/src/DMXMinEkineCuts.cc

0001 //
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0024 // ********************************************************************
0025 //
0026 //
0027 //
0028 //
0029 // --------------------------------------------------------------
0030 //  GEANT 4 class implementation file
0031 //
0032 //  History: first implementation, based on object model of
0033 //  2nd December 1995, G.Cosmo
0034 // --------------------------------------------------------------
0035 //                   15 April 1998 M.Maire
0036 // --------------------------------------------------------------
0037
0038 #include "DMXMinEkineCuts.hh"
0039
0040 #include "G4Step.hh"
0041 #include "G4UserLimits.hh"
0042 #include "G4VParticleChange.hh"
0043 #include "G4LossTableManager.hh"
0044
0045 DMXMinEkineCuts::DMXMinEkineCuts(const G4String& aName)
0046   : DMXSpecialCuts(aName)
0047 {
0048     if (verboseLevel>1) {
0049     G4cout << GetProcessName() << " is created "<< G4endl;
0050    }
0051   SetProcessType(fUserDefined);
0052 }
0053
0054 DMXMinEkineCuts::~DMXMinEkineCuts()
0055 {}
0056
0057 DMXMinEkineCuts::DMXMinEkineCuts(DMXMinEkineCuts&)
0058   : DMXSpecialCuts()
0059 {}
0060
0061
0062 G4double DMXMinEkineCuts::PostStepGetPhysicalInteractionLength(
0063                              const G4Track& aTrack,
0064                  G4double ,
0065                  G4ForceCondition* condition)
0066 {
0067   // condition is set to "Not Forced"
0068   *condition = NotForced;
0069
0070   G4double     proposedStep = DBL_MAX;
0071   // get the pointer to UserLimits
0072   G4UserLimits* pUserLimits = aTrack.GetVolume()->GetLogicalVolume()->GetUserLimits();
0073   const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
0074   G4ParticleDefinition* aParticleDef = aTrack.GetDefinition();
0075
0076   if (pUserLimits && aParticleDef->GetPDGCharge() != 0.0) {
0077     //min kinetic energy
0078     G4double temp = DBL_MAX;
0079     G4double    eKine     = aParticle->GetKineticEnergy();
0080     const G4MaterialCutsCouple* couple = aTrack.GetMaterialCutsCouple();
0081     G4double eMin = pUserLimits->GetUserMinEkine(aTrack);
0082
0083     if (eKine < eMin)
0084       return 0.;
0085
0086     G4double    rangeNow = DBL_MAX;
0087
0088     G4LossTableManager* lossManager = G4LossTableManager::Instance();
0089     rangeNow = lossManager->GetRange(aParticleDef,eKine,couple);
0090
0091     // charged particles only
0092     G4double rangeMin = lossManager->GetRange(aParticleDef,eMin,couple);
0093     temp = rangeNow - rangeMin;
0094     if (proposedStep > temp) proposedStep = temp;
0095   }
0096   return proposedStep;
0097 }