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26 /// \file processes/phonon/src/G4VPhononProces 26 /// \file processes/phonon/src/G4VPhononProcess.cc
27 /// \brief Implementation of the G4VPhononProc 27 /// \brief Implementation of the G4VPhononProcess base class
28 // 28 //
29 // 29 //
30 // 20131111 Add verbosity to report creating 30 // 20131111 Add verbosity to report creating secondaries
31 31
32 #include "G4VPhononProcess.hh" 32 #include "G4VPhononProcess.hh"
33 #include "G4DynamicParticle.hh" 33 #include "G4DynamicParticle.hh"
34 #include "G4ExceptionSeverity.hh" 34 #include "G4ExceptionSeverity.hh"
35 #include "G4LatticeManager.hh" 35 #include "G4LatticeManager.hh"
36 #include "G4LatticePhysical.hh" 36 #include "G4LatticePhysical.hh"
37 #include "G4ParticleDefinition.hh" 37 #include "G4ParticleDefinition.hh"
38 #include "G4PhononLong.hh" 38 #include "G4PhononLong.hh"
39 #include "G4PhononPolarization.hh" 39 #include "G4PhononPolarization.hh"
40 #include "G4PhononTrackMap.hh" 40 #include "G4PhononTrackMap.hh"
41 #include "G4PhononTransFast.hh" 41 #include "G4PhononTransFast.hh"
42 #include "G4PhononTransSlow.hh" 42 #include "G4PhononTransSlow.hh"
43 #include "G4ProcessType.hh" 43 #include "G4ProcessType.hh"
44 #include "G4ThreeVector.hh" 44 #include "G4ThreeVector.hh"
45 #include "G4Track.hh" 45 #include "G4Track.hh"
46 46
47 namespace { 47 namespace {
48 const G4ThreeVector nullVec(0.,0.,0.); // F 48 const G4ThreeVector nullVec(0.,0.,0.); // For convenience below
49 } 49 }
50 50
51 // Constructor and destructor 51 // Constructor and destructor
52 52
53 G4VPhononProcess::G4VPhononProcess(const G4Str 53 G4VPhononProcess::G4VPhononProcess(const G4String& processName)
54 : G4VDiscreteProcess(processName, fPhonon), 54 : G4VDiscreteProcess(processName, fPhonon),
55 trackKmap(G4PhononTrackMap::GetInstance()) 55 trackKmap(G4PhononTrackMap::GetInstance()), theLattice(0),
56 currentTrack(0) {} 56 currentTrack(0) {}
57 57
58 G4VPhononProcess::~G4VPhononProcess() {;} 58 G4VPhononProcess::~G4VPhononProcess() {;}
59 59
60 60
61 // Only applies to the known phonon polarizati 61 // Only applies to the known phonon polarization states
62 62
63 G4bool G4VPhononProcess::IsApplicable(const G4 63 G4bool G4VPhononProcess::IsApplicable(const G4ParticleDefinition& aPD) {
64 return (&aPD==G4PhononLong::Definition() || 64 return (&aPD==G4PhononLong::Definition() ||
65 &aPD==G4PhononTransFast::Definition() || 65 &aPD==G4PhononTransFast::Definition() ||
66 &aPD==G4PhononTransSlow::Definition() ); 66 &aPD==G4PhononTransSlow::Definition() );
67 } 67 }
68 68
69 69
70 // Initialize wave vectors for currently activ 70 // Initialize wave vectors for currently active track(s)
71 71
72 void G4VPhononProcess::StartTracking(G4Track* 72 void G4VPhononProcess::StartTracking(G4Track* track) {
73 G4VProcess::StartTracking(track); // Apply b 73 G4VProcess::StartTracking(track); // Apply base class actions
74 74
75 // FIXME: THE WAVEVECTOR SHOULD BE COMPUTED 75 // FIXME: THE WAVEVECTOR SHOULD BE COMPUTED BY INVERTING THE K/V MAP
76 if (!trackKmap->Find(track)) 76 if (!trackKmap->Find(track))
77 trackKmap->SetK(track, track->GetMomentumD 77 trackKmap->SetK(track, track->GetMomentumDirection());
78 78
79 currentTrack = track; // Save for use by 79 currentTrack = track; // Save for use by EndTracking
80 80
81 // Fetch lattice for current track once, use 81 // Fetch lattice for current track once, use in subsequent steps
82 G4LatticeManager* LM = G4LatticeManager::Get 82 G4LatticeManager* LM = G4LatticeManager::GetLatticeManager();
83 theLattice = LM->GetLattice(track->GetVolume 83 theLattice = LM->GetLattice(track->GetVolume());
84 } 84 }
85 85
86 void G4VPhononProcess::EndTracking() { 86 void G4VPhononProcess::EndTracking() {
87 G4VProcess::EndTracking(); // Apply base 87 G4VProcess::EndTracking(); // Apply base class actions
88 trackKmap->RemoveTrack(currentTrack); 88 trackKmap->RemoveTrack(currentTrack);
89 currentTrack = 0; 89 currentTrack = 0;
90 theLattice = 0; 90 theLattice = 0;
91 } 91 }
92 92
93 93
94 // For convenience, map phonon type to polariz 94 // For convenience, map phonon type to polarization code
95 95
96 G4int G4VPhononProcess::GetPolarization(const 96 G4int G4VPhononProcess::GetPolarization(const G4Track& track) const {
97 return G4PhononPolarization::Get(track.GetPa 97 return G4PhononPolarization::Get(track.GetParticleDefinition());
98 } 98 }
99 99
100 100
101 // Generate random polarization from density o 101 // Generate random polarization from density of states
102 102
103 G4int G4VPhononProcess::ChoosePolarization(G4d 103 G4int G4VPhononProcess::ChoosePolarization(G4double Ldos, G4double STdos,
104 G4double FTdos) const { 104 G4double FTdos) const {
105 G4double norm = Ldos + STdos + FTdos; 105 G4double norm = Ldos + STdos + FTdos;
106 G4double cProbST = STdos/norm; 106 G4double cProbST = STdos/norm;
107 G4double cProbFT = FTdos/norm + cProbST; 107 G4double cProbFT = FTdos/norm + cProbST;
108 108
109 // NOTE: Order of selection done to match p 109 // NOTE: Order of selection done to match previous random sequences
110 G4double modeMixer = G4UniformRand(); 110 G4double modeMixer = G4UniformRand();
111 if (modeMixer<cProbST) return G4PhononPolari 111 if (modeMixer<cProbST) return G4PhononPolarization::TransSlow;
112 if (modeMixer<cProbFT) return G4PhononPolari 112 if (modeMixer<cProbFT) return G4PhononPolarization::TransFast;
113 return G4PhononPolarization::Long; 113 return G4PhononPolarization::Long;
114 } 114 }
115 115
116 116
117 // Create new secondary track from phonon conf 117 // Create new secondary track from phonon configuration
118 118
119 G4Track* G4VPhononProcess::CreateSecondary(G4i 119 G4Track* G4VPhononProcess::CreateSecondary(G4int polarization,
120 const G4ThreeVector& waveVec, 120 const G4ThreeVector& waveVec,
121 G4double energy) const { 121 G4double energy) const {
122 if (verboseLevel>1) { 122 if (verboseLevel>1) {
123 G4cout << GetProcessName() << " CreateSeco 123 G4cout << GetProcessName() << " CreateSecondary pol " << polarization
124 << " K " << waveVec << " E " << energy << 124 << " K " << waveVec << " E " << energy << G4endl;
125 } 125 }
126 126
127 G4ThreeVector vgroup = theLattice->MapKtoVDi 127 G4ThreeVector vgroup = theLattice->MapKtoVDir(polarization, waveVec);
128 if (verboseLevel>1) G4cout << " MapKtoVDir r 128 if (verboseLevel>1) G4cout << " MapKtoVDir returned " << vgroup << G4endl;
129 129
130 vgroup = theLattice->RotateToGlobal(vgroup); 130 vgroup = theLattice->RotateToGlobal(vgroup);
131 if (verboseLevel>1) G4cout << " RotateToGlob 131 if (verboseLevel>1) G4cout << " RotateToGlobal returned " << vgroup << G4endl;
132 132
133 if (verboseLevel && std::fabs(vgroup.mag()-1 133 if (verboseLevel && std::fabs(vgroup.mag()-1.) > 0.01) {
134 G4cout << "WARNING: " << GetProcessName() 134 G4cout << "WARNING: " << GetProcessName() << " vgroup not a unit vector: "
135 << vgroup << G4endl; 135 << vgroup << G4endl;
136 } 136 }
137 137
138 G4ParticleDefinition* thePhonon = G4PhononPo 138 G4ParticleDefinition* thePhonon = G4PhononPolarization::Get(polarization);
139 139
140 // Secondaries are created at the current tr 140 // Secondaries are created at the current track coordinates
141 G4Track* sec = new G4Track(new G4DynamicPart 141 G4Track* sec = new G4Track(new G4DynamicParticle(thePhonon, vgroup, energy),
142 currentTrack->GetGlobalTime(), 142 currentTrack->GetGlobalTime(),
143 currentTrack->GetPosition()); 143 currentTrack->GetPosition());
144 144
145 // Store wavevector in lookup table for futu 145 // Store wavevector in lookup table for future tracking
146 trackKmap->SetK(sec, theLattice->RotateToGlo 146 trackKmap->SetK(sec, theLattice->RotateToGlobal(waveVec));
147 147
148 if (verboseLevel>1) { 148 if (verboseLevel>1) {
149 G4cout << GetProcessName() << " secondary 149 G4cout << GetProcessName() << " secondary K rotated to "
150 << trackKmap->GetK(sec) << G4endl; 150 << trackKmap->GetK(sec) << G4endl;
151 } 151 }
152 152
153 sec->SetVelocity(theLattice->MapKtoV(polariz 153 sec->SetVelocity(theLattice->MapKtoV(polarization, waveVec));
154 sec->UseGivenVelocity(true); 154 sec->UseGivenVelocity(true);
155 155
156 return sec; 156 return sec;
157 } 157 }
158 158