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26 /// \file processes/phonon/src/G4PhononReflect 26 /// \file processes/phonon/src/G4PhononReflection.cc
27 /// \brief Implementation of the G4PhononRefle 27 /// \brief Implementation of the G4PhononReflection class
28 // 28 //
29 // This process handles the interaction of pho 29 // This process handles the interaction of phonons with
30 // boundaries. Implementation of this class is 30 // boundaries. Implementation of this class is highly
31 // geometry dependent.Currently, phonons are k 31 // geometry dependent.Currently, phonons are killed when
32 // they reach a boundary. If the other side of 32 // they reach a boundary. If the other side of the
33 // boundary was Al, a hit is registered. 33 // boundary was Al, a hit is registered.
34 // 34 //
35 // 35 //
36 // 20131115 Throw exception if track's polari 36 // 20131115 Throw exception if track's polarization state is invalid.
37 37
38 #include "G4PhononReflection.hh" 38 #include "G4PhononReflection.hh"
39 #include "G4ExceptionSeverity.hh" 39 #include "G4ExceptionSeverity.hh"
40 #include "G4GeometryTolerance.hh" 40 #include "G4GeometryTolerance.hh"
41 #include "G4LatticePhysical.hh" 41 #include "G4LatticePhysical.hh"
42 #include "G4PhononLong.hh" 42 #include "G4PhononLong.hh"
43 #include "G4PhononTransFast.hh" 43 #include "G4PhononTransFast.hh"
44 #include "G4PhononTransSlow.hh" 44 #include "G4PhononTransSlow.hh"
45 #include "G4PhysicalConstants.hh" 45 #include "G4PhysicalConstants.hh"
46 #include "G4Step.hh" 46 #include "G4Step.hh"
47 #include "G4StepPoint.hh" 47 #include "G4StepPoint.hh"
48 #include "G4SystemOfUnits.hh" 48 #include "G4SystemOfUnits.hh"
49 #include "G4VParticleChange.hh" 49 #include "G4VParticleChange.hh"
50 50
51 51
52 G4PhononReflection::G4PhononReflection(const G 52 G4PhononReflection::G4PhononReflection(const G4String& aName)
53 : G4VPhononProcess(aName), 53 : G4VPhononProcess(aName),
54 kCarTolerance(G4GeometryTolerance::GetInst 54 kCarTolerance(G4GeometryTolerance::GetInstance()->GetSurfaceTolerance()) {;}
55 55
56 G4PhononReflection::~G4PhononReflection() {;} 56 G4PhononReflection::~G4PhononReflection() {;}
57 57
58 //....oooOO0OOooo........oooOO0OOooo........oo 58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 59
60 // Always return DBL_MAX and Forced. This ensu 60 // Always return DBL_MAX and Forced. This ensures that the process is
61 // called at the end of every step. In PostSte 61 // called at the end of every step. In PostStepDoIt the process
62 // decides whether the step encountered a volu 62 // decides whether the step encountered a volume boundary and a
63 // reflection should be applied 63 // reflection should be applied
64 64
65 G4double G4PhononReflection::GetMeanFreePath(c 65 G4double G4PhononReflection::GetMeanFreePath(const G4Track&, G4double,
66 G4ForceCondition* condition) { 66 G4ForceCondition* condition) {
67 *condition = Forced; 67 *condition = Forced;
68 return DBL_MAX; 68 return DBL_MAX;
69 } 69 }
70 70
71 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 72
73 // This process handles the interaction of pho 73 // This process handles the interaction of phonons with
74 // boundaries. Implementation of this class is 74 // boundaries. Implementation of this class is highly geometry
75 // dependent.Currently, phonons are killed whe 75 // dependent.Currently, phonons are killed when they reach a
76 // boundary. If the other side of the boundary 76 // boundary. If the other side of the boundary was Al, a hit is
77 // registered. 77 // registered.
78 78
79 G4VParticleChange* G4PhononReflection::PostSte 79 G4VParticleChange* G4PhononReflection::PostStepDoIt(const G4Track& aTrack,
80 const G4Step& aStep) { 80 const G4Step& aStep) {
81 aParticleChange.Initialize(aTrack); 81 aParticleChange.Initialize(aTrack);
82 82
83 //Check if current step is limited by a volu 83 //Check if current step is limited by a volume boundary
84 G4StepPoint* postStepPoint = aStep.GetPostSt 84 G4StepPoint* postStepPoint = aStep.GetPostStepPoint();
85 if (postStepPoint->GetStepStatus()!=fGeomBou 85 if (postStepPoint->GetStepStatus()!=fGeomBoundary) {
86 //make sure that correct phonon velocity i 86 //make sure that correct phonon velocity is used after the step
87 int pol = GetPolarization(aTrack); 87 int pol = GetPolarization(aTrack);
88 if (pol < 0 || pol > 2) { 88 if (pol < 0 || pol > 2) {
89 G4Exception("G4PhononReflection::PostSte 89 G4Exception("G4PhononReflection::PostStepDoIt","Phonon001",
90 EventMustBeAborted, "Track is not a phon 90 EventMustBeAborted, "Track is not a phonon");
91 return &aParticleChange; // NOTE: Wil 91 return &aParticleChange; // NOTE: Will never get here
92 } 92 }
93 93
94 // FIXME: This should be using wave-vecto 94 // FIXME: This should be using wave-vector, shouldn't it?
95 G4double vg = theLattice->MapKtoV(pol, aTr 95 G4double vg = theLattice->MapKtoV(pol, aTrack.GetMomentumDirection());
96 96
97 //Since step was not a volume boundary, ju 97 //Since step was not a volume boundary, just set correct phonon velocity and return
98 aParticleChange.ProposeVelocity(vg); 98 aParticleChange.ProposeVelocity(vg);
99 return &aParticleChange; 99 return &aParticleChange;
100 } 100 }
101 101
102 // do nothing but return is the step is too 102 // do nothing but return is the step is too short
103 // This is to allow actual reflection where 103 // This is to allow actual reflection where after
104 // the first boundary crossing a second, inf 104 // the first boundary crossing a second, infinitesimal
105 // step occurs crossing back into the origin 105 // step occurs crossing back into the original volume
106 if (aTrack.GetStepLength()<=kCarTolerance/2) 106 if (aTrack.GetStepLength()<=kCarTolerance/2) {
107 return &aParticleChange; 107 return &aParticleChange;
108 } 108 }
109 109
110 G4double eKin = aTrack.GetKineticEnergy(); 110 G4double eKin = aTrack.GetKineticEnergy();
111 aParticleChange.ProposeNonIonizingEnergyDepo 111 aParticleChange.ProposeNonIonizingEnergyDeposit(eKin);
112 aParticleChange.ProposeTrackStatus(fStopAndK 112 aParticleChange.ProposeTrackStatus(fStopAndKill);
113 113
114 return &aParticleChange; 114 return &aParticleChange;
115 } 115 }
116 116
117 //....oooOO0OOooo........oooOO0OOooo........oo 117 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
118 118
119 119
120 120