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1 //
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15 // * use. Please see the license in the file LICENSE and URL above *
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18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
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24 // ********************************************************************
25 //
26 //
27 //
28 //
29 // --------------------------------------------------------------
30 // GEANT 4 class implementation file
31 //
32 // History: first implementation, based on object model of
33 // 2nd December 1995, G.Cosmo
34 // --------------------------------------------------------------
35 // 15 April 1998 M.Maire
36 // --------------------------------------------------------------
37
38 #include "DMXMinEkineCuts.hh"
39
40 #include "G4Step.hh"
41 #include "G4UserLimits.hh"
42 #include "G4VParticleChange.hh"
43 #include "G4LossTableManager.hh"
44
45 DMXMinEkineCuts::DMXMinEkineCuts(const G4String& aName)
46 : DMXSpecialCuts(aName)
47 {
48 if (verboseLevel>1) {
49 G4cout << GetProcessName() << " is created "<< G4endl;
50 }
51 SetProcessType(fUserDefined);
52 }
53
54 DMXMinEkineCuts::~DMXMinEkineCuts()
55 {}
56
57 DMXMinEkineCuts::DMXMinEkineCuts(DMXMinEkineCuts&)
58 : DMXSpecialCuts()
59 {}
60
61
62 G4double DMXMinEkineCuts::PostStepGetPhysicalInteractionLength(
63 const G4Track& aTrack,
64 G4double ,
65 G4ForceCondition* condition)
66 {
67 // condition is set to "Not Forced"
68 *condition = NotForced;
69
70 G4double proposedStep = DBL_MAX;
71 // get the pointer to UserLimits
72 G4UserLimits* pUserLimits = aTrack.GetVolume()->GetLogicalVolume()->GetUserLimits();
73 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
74 G4ParticleDefinition* aParticleDef = aTrack.GetDefinition();
75
76 if (pUserLimits && aParticleDef->GetPDGCharge() != 0.0) {
77 //min kinetic energy
78 G4double temp = DBL_MAX;
79 G4double eKine = aParticle->GetKineticEnergy();
80 const G4MaterialCutsCouple* couple = aTrack.GetMaterialCutsCouple();
81 G4double eMin = pUserLimits->GetUserMinEkine(aTrack);
82
83 if (eKine < eMin)
84 return 0.;
85
86 G4double rangeNow = DBL_MAX;
87
88 G4LossTableManager* lossManager = G4LossTableManager::Instance();
89 rangeNow = lossManager->GetRange(aParticleDef,eKine,couple);
90
91 // charged particles only
92 G4double rangeMin = lossManager->GetRange(aParticleDef,eMin,couple);
93 temp = rangeNow - rangeMin;
94 if (proposedStep > temp) proposedStep = temp;
95 }
96 return proposedStep;
97 }
98