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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 // $Id: G4PhononReflection.cc 76799 2013-11-15 20:30:53Z mkelsey $
35 // 36 //
36 // 20131115 Throw exception if track's polari 37 // 20131115 Throw exception if track's polarization state is invalid.
37 38
38 #include "G4PhononReflection.hh" 39 #include "G4PhononReflection.hh"
39 #include "G4ExceptionSeverity.hh" 40 #include "G4ExceptionSeverity.hh"
40 #include "G4GeometryTolerance.hh" 41 #include "G4GeometryTolerance.hh"
41 #include "G4LatticePhysical.hh" 42 #include "G4LatticePhysical.hh"
42 #include "G4PhononLong.hh" 43 #include "G4PhononLong.hh"
43 #include "G4PhononTransFast.hh" 44 #include "G4PhononTransFast.hh"
44 #include "G4PhononTransSlow.hh" 45 #include "G4PhononTransSlow.hh"
45 #include "G4PhysicalConstants.hh" 46 #include "G4PhysicalConstants.hh"
46 #include "G4Step.hh" 47 #include "G4Step.hh"
47 #include "G4StepPoint.hh" 48 #include "G4StepPoint.hh"
48 #include "G4SystemOfUnits.hh" 49 #include "G4SystemOfUnits.hh"
49 #include "G4VParticleChange.hh" 50 #include "G4VParticleChange.hh"
50 51
51 52
52 G4PhononReflection::G4PhononReflection(const G 53 G4PhononReflection::G4PhononReflection(const G4String& aName)
53 : G4VPhononProcess(aName), 54 : G4VPhononProcess(aName),
54 kCarTolerance(G4GeometryTolerance::GetInst 55 kCarTolerance(G4GeometryTolerance::GetInstance()->GetSurfaceTolerance()) {;}
55 56
56 G4PhononReflection::~G4PhononReflection() {;} 57 G4PhononReflection::~G4PhononReflection() {;}
57 58
58 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 60
60 // Always return DBL_MAX and Forced. This ensu 61 // Always return DBL_MAX and Forced. This ensures that the process is
61 // called at the end of every step. In PostSte 62 // called at the end of every step. In PostStepDoIt the process
62 // decides whether the step encountered a volu 63 // decides whether the step encountered a volume boundary and a
63 // reflection should be applied 64 // reflection should be applied
64 65
65 G4double G4PhononReflection::GetMeanFreePath(c 66 G4double G4PhononReflection::GetMeanFreePath(const G4Track&, G4double,
66 G4ForceCondition* condition) { 67 G4ForceCondition* condition) {
67 *condition = Forced; 68 *condition = Forced;
68 return DBL_MAX; 69 return DBL_MAX;
69 } 70 }
70 71
71 //....oooOO0OOooo........oooOO0OOooo........oo 72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 73
73 // This process handles the interaction of pho 74 // This process handles the interaction of phonons with
74 // boundaries. Implementation of this class is 75 // boundaries. Implementation of this class is highly geometry
75 // dependent.Currently, phonons are killed whe 76 // dependent.Currently, phonons are killed when they reach a
76 // boundary. If the other side of the boundary 77 // boundary. If the other side of the boundary was Al, a hit is
77 // registered. 78 // registered.
78 79
79 G4VParticleChange* G4PhononReflection::PostSte 80 G4VParticleChange* G4PhononReflection::PostStepDoIt(const G4Track& aTrack,
80 const G4Step& aStep) { 81 const G4Step& aStep) {
81 aParticleChange.Initialize(aTrack); 82 aParticleChange.Initialize(aTrack);
82 83
83 //Check if current step is limited by a volu 84 //Check if current step is limited by a volume boundary
84 G4StepPoint* postStepPoint = aStep.GetPostSt 85 G4StepPoint* postStepPoint = aStep.GetPostStepPoint();
85 if (postStepPoint->GetStepStatus()!=fGeomBou 86 if (postStepPoint->GetStepStatus()!=fGeomBoundary) {
86 //make sure that correct phonon velocity i 87 //make sure that correct phonon velocity is used after the step
87 int pol = GetPolarization(aTrack); 88 int pol = GetPolarization(aTrack);
88 if (pol < 0 || pol > 2) { 89 if (pol < 0 || pol > 2) {
89 G4Exception("G4PhononReflection::PostSte 90 G4Exception("G4PhononReflection::PostStepDoIt","Phonon001",
90 EventMustBeAborted, "Track is not a phon 91 EventMustBeAborted, "Track is not a phonon");
91 return &aParticleChange; // NOTE: Wil 92 return &aParticleChange; // NOTE: Will never get here
92 } 93 }
93 94
94 // FIXME: This should be using wave-vecto 95 // FIXME: This should be using wave-vector, shouldn't it?
95 G4double vg = theLattice->MapKtoV(pol, aTr 96 G4double vg = theLattice->MapKtoV(pol, aTrack.GetMomentumDirection());
96 97
97 //Since step was not a volume boundary, ju 98 //Since step was not a volume boundary, just set correct phonon velocity and return
98 aParticleChange.ProposeVelocity(vg); 99 aParticleChange.ProposeVelocity(vg);
99 return &aParticleChange; 100 return &aParticleChange;
100 } 101 }
101 102
102 // do nothing but return is the step is too 103 // do nothing but return is the step is too short
103 // This is to allow actual reflection where 104 // This is to allow actual reflection where after
104 // the first boundary crossing a second, inf 105 // the first boundary crossing a second, infinitesimal
105 // step occurs crossing back into the origin 106 // step occurs crossing back into the original volume
106 if (aTrack.GetStepLength()<=kCarTolerance/2) 107 if (aTrack.GetStepLength()<=kCarTolerance/2) {
107 return &aParticleChange; 108 return &aParticleChange;
108 } 109 }
109 110
110 G4double eKin = aTrack.GetKineticEnergy(); 111 G4double eKin = aTrack.GetKineticEnergy();
111 aParticleChange.ProposeNonIonizingEnergyDepo 112 aParticleChange.ProposeNonIonizingEnergyDeposit(eKin);
112 aParticleChange.ProposeTrackStatus(fStopAndK 113 aParticleChange.ProposeTrackStatus(fStopAndKill);
113 114
114 return &aParticleChange; 115 return &aParticleChange;
115 } 116 }
116 117
117 //....oooOO0OOooo........oooOO0OOooo........oo 118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
118 119
119 120
120 121