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26 /// \file GB01/src/GB01BOptrChangeCrossSection 26 /// \file GB01/src/GB01BOptrChangeCrossSection.cc
27 /// \brief Implementation of the GB01BOptrChan 27 /// \brief Implementation of the GB01BOptrChangeCrossSection class
28 // 28 //
29 #include "GB01BOptrChangeCrossSection.hh" 29 #include "GB01BOptrChangeCrossSection.hh"
30 <<
31 #include "G4BOptnChangeCrossSection.hh" <<
32 #include "G4BiasingProcessInterface.hh" 30 #include "G4BiasingProcessInterface.hh"
33 #include "G4InteractionLawPhysical.hh" << 31 #include "G4BOptnChangeCrossSection.hh"
>> 32
34 #include "G4ParticleDefinition.hh" 33 #include "G4ParticleDefinition.hh"
35 #include "G4ParticleTable.hh" 34 #include "G4ParticleTable.hh"
36 #include "G4VProcess.hh" 35 #include "G4VProcess.hh"
>> 36
37 #include "Randomize.hh" 37 #include "Randomize.hh"
38 38
>> 39 #include "G4InteractionLawPhysical.hh"
>> 40
39 //....oooOO0OOooo........oooOO0OOooo........oo 41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
40 42
41 GB01BOptrChangeCrossSection::GB01BOptrChangeCr << 43 GB01BOptrChangeCrossSection::GB01BOptrChangeCrossSection(G4String particleName,
42 : G4VBiasingOperator(name), fSetup(true) << 44 G4String name)
>> 45 : G4VBiasingOperator(name),
>> 46 fSetup(true)
43 { 47 {
44 fParticleToBias = G4ParticleTable::GetPartic 48 fParticleToBias = G4ParticleTable::GetParticleTable()->FindParticle(particleName);
45 << 49
46 if (fParticleToBias == 0) { << 50 if ( fParticleToBias == 0 )
47 G4ExceptionDescription ed; << 51 {
48 ed << "Particle `" << particleName << "' n << 52 G4ExceptionDescription ed;
49 G4Exception("GB01BOptrChangeCrossSection(. << 53 ed << "Particle `" << particleName << "' not found !" << G4endl;
50 } << 54 G4Exception("GB01BOptrChangeCrossSection(...)",
>> 55 "exGB01.01",
>> 56 JustWarning,
>> 57 ed);
>> 58 }
51 } 59 }
52 60
53 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 62
55 GB01BOptrChangeCrossSection::~GB01BOptrChangeC 63 GB01BOptrChangeCrossSection::~GB01BOptrChangeCrossSection()
56 { 64 {
57 for (std::map<const G4BiasingProcessInterfac << 65 for ( std::map< const G4BiasingProcessInterface*, G4BOptnChangeCrossSection* >::iterator
58 fChangeCrossSectionOperations.begin() << 66 it = fChangeCrossSectionOperations.begin() ;
59 it != fChangeCrossSectionOperations.end << 67 it != fChangeCrossSectionOperations.end() ;
60 delete (*it).second; << 68 it++ ) delete (*it).second;
61 } 69 }
62 70
63 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64 72
65 void GB01BOptrChangeCrossSection::StartRun() 73 void GB01BOptrChangeCrossSection::StartRun()
66 { 74 {
67 // -------------- 75 // --------------
68 // -- Setup stage: 76 // -- Setup stage:
69 // --------------- 77 // ---------------
70 // -- Start by collecting processes under bi 78 // -- Start by collecting processes under biasing, create needed biasing
71 // -- operations and associate these operati 79 // -- operations and associate these operations to the processes:
72 if (fSetup) { << 80 if ( fSetup )
73 const G4ProcessManager* processManager = f <<
74 const G4BiasingProcessSharedData* sharedDa <<
75 G4BiasingProcessInterface::GetSharedData <<
76 if (sharedData) // -- sharedData tested, <<
77 // -- volume but without <<
78 { 81 {
79 for (size_t i = 0; i < (sharedData->GetP << 82 const G4ProcessManager* processManager = fParticleToBias->GetProcessManager();
80 const G4BiasingProcessInterface* wrapp << 83 const G4BiasingProcessSharedData* sharedData =
81 (sharedData->GetPhysicsBiasingProces << 84 G4BiasingProcessInterface::GetSharedData( processManager );
82 G4String operationName = << 85 if ( sharedData ) // -- sharedData tested, as is can happen a user attaches an operator to a
83 "XSchange-" + wrapperProcess->GetWra << 86 // -- volume but without defined BiasingProcessInterface processes.
84 fChangeCrossSectionOperations[wrapperP << 87 {
85 new G4BOptnChangeCrossSection(operat << 88 for ( size_t i = 0 ; i < (sharedData->GetPhysicsBiasingProcessInterfaces()).size(); i++ )
86 } << 89 {
>> 90 const G4BiasingProcessInterface* wrapperProcess =
>> 91 (sharedData->GetPhysicsBiasingProcessInterfaces())[i];
>> 92 G4String operationName = "XSchange-" +
>> 93 wrapperProcess->GetWrappedProcess()->GetProcessName();
>> 94 fChangeCrossSectionOperations[wrapperProcess] =
>> 95 new G4BOptnChangeCrossSection(operationName);
>> 96 }
>> 97 }
>> 98 fSetup = false;
87 } 99 }
88 fSetup = false; <<
89 } <<
90 } 100 }
91 101
92 //....oooOO0OOooo........oooOO0OOooo........oo 102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93 103
94 G4VBiasingOperation* GB01BOptrChangeCrossSecti << 104 G4VBiasingOperation*
95 const G4Track* track, const G4BiasingProcess << 105 GB01BOptrChangeCrossSection::ProposeOccurenceBiasingOperation(const G4Track* track,
>> 106 const G4BiasingProcessInterface*
>> 107 callingProcess)
96 { 108 {
>> 109
97 // ----------------------------------------- 110 // -----------------------------------------------------
98 // -- Check if current particle type is the 111 // -- Check if current particle type is the one to bias:
99 // ----------------------------------------- 112 // -----------------------------------------------------
100 if (track->GetDefinition() != fParticleToBia << 113 if ( track->GetDefinition() != fParticleToBias ) return 0;
101 << 114
>> 115
102 // ----------------------------------------- 116 // ---------------------------------------------------------------------
103 // -- select and setup the biasing operation 117 // -- select and setup the biasing operation for current callingProcess:
104 // ----------------------------------------- 118 // ---------------------------------------------------------------------
105 // -- Check if the analog cross-section well 119 // -- Check if the analog cross-section well defined : for example, the conversion
106 // -- process for a gamma below e+e- creatio 120 // -- process for a gamma below e+e- creation threshold has an DBL_MAX interaction
107 // -- length. Nothing is done in this case ( 121 // -- length. Nothing is done in this case (ie, let analog process to deal with the case)
108 G4double analogInteractionLength = << 122 G4double analogInteractionLength =
109 callingProcess->GetWrappedProcess()->GetCu 123 callingProcess->GetWrappedProcess()->GetCurrentInteractionLength();
110 if (analogInteractionLength > DBL_MAX / 10.) << 124 if ( analogInteractionLength > DBL_MAX/10. ) return 0;
111 125
112 // -- Analog cross-section is well-defined: 126 // -- Analog cross-section is well-defined:
113 G4double analogXS = 1. / analogInteractionLe << 127 G4double analogXS = 1./analogInteractionLength;
114 128
115 // -- Choose a constant cross-section bias. 129 // -- Choose a constant cross-section bias. But at this level, this factor can be made
116 // -- direction dependent, like in the expon 130 // -- direction dependent, like in the exponential transform MCNP case, or it
117 // -- can be chosen differently, depending o 131 // -- can be chosen differently, depending on the process, etc.
118 G4double XStransformation = 2.0; << 132 G4double XStransformation = 2.0 ;
119 << 133
120 // -- fetch the operation associated to this 134 // -- fetch the operation associated to this callingProcess:
121 G4BOptnChangeCrossSection* operation = fChan << 135 G4BOptnChangeCrossSection* operation = fChangeCrossSectionOperations[callingProcess];
122 // -- get the operation that was proposed to 136 // -- get the operation that was proposed to the process in the previous step:
123 G4VBiasingOperation* previousOperation = cal 137 G4VBiasingOperation* previousOperation = callingProcess->GetPreviousOccurenceBiasingOperation();
124 << 138
125 // -- now setup the operation to be returned 139 // -- now setup the operation to be returned to the process: this
126 // -- consists in setting the biased cross-s 140 // -- consists in setting the biased cross-section, and in asking
127 // -- the operation to sample its exponentia 141 // -- the operation to sample its exponential interaction law.
128 // -- To do this, to first order, the two li 142 // -- To do this, to first order, the two lines:
129 // operation->SetBiasedCrossSection( 143 // operation->SetBiasedCrossSection( XStransformation * analogXS );
130 // operation->Sample(); 144 // operation->Sample();
131 // -- are correct and sufficient. 145 // -- are correct and sufficient.
132 // -- But, to avoid having to shoot a random 146 // -- But, to avoid having to shoot a random number each time, we sample
133 // -- only on the first time the operation i 147 // -- only on the first time the operation is proposed, or if the interaction
134 // -- occured. If the interaction did not oc 148 // -- occured. If the interaction did not occur for the process in the previous,
135 // -- we update the number of interaction le 149 // -- we update the number of interaction length instead of resampling.
136 if (previousOperation == 0) { << 150 if ( previousOperation == 0 )
137 operation->SetBiasedCrossSection(XStransfo << 151 {
138 operation->Sample(); << 152 operation->SetBiasedCrossSection( XStransformation * analogXS );
139 } <<
140 else { <<
141 if (previousOperation != operation) { <<
142 // -- should not happen ! <<
143 G4ExceptionDescription ed; <<
144 ed << " Logic problem in operation handl <<
145 G4Exception("GB01BOptrChangeCrossSection <<
146 JustWarning, ed); <<
147 return 0; <<
148 } <<
149 if (operation->GetInteractionOccured()) { <<
150 operation->SetBiasedCrossSection(XStrans <<
151 operation->Sample(); 153 operation->Sample();
152 } 154 }
153 else { << 155 else
154 // -- update the 'interaction length' an << 156 {
155 // -- for past step (this takes into ac << 157 if ( previousOperation != operation )
156 operation->UpdateForStep(callingProcess- << 158 {
157 // -- update the cross-section value: << 159 // -- should not happen !
158 operation->SetBiasedCrossSection(XStrans << 160 G4ExceptionDescription ed;
159 // -- forces recomputation of the 'inter << 161 ed << " Logic problem in operation handling !" << G4endl;
160 // -- new cross-section value [tricky : << 162 G4Exception("GB01BOptrChangeCrossSection::ProposeOccurenceBiasingOperation(...)",
161 operation->UpdateForStep(0.0); << 163 "exGB01.02",
>> 164 JustWarning,
>> 165 ed);
>> 166 return 0;
>> 167 }
>> 168 if ( operation->GetInteractionOccured() )
>> 169 {
>> 170 operation->SetBiasedCrossSection( XStransformation * analogXS );
>> 171 operation->Sample();
>> 172 }
>> 173 else
>> 174 {
>> 175 // -- update the 'interaction length' and underneath 'number of interaction lengths'
>> 176 // -- for past step (this takes into accout the previous step cross-section value)
>> 177 operation->UpdateForStep( callingProcess->GetPreviousStepSize() );
>> 178 // -- update the cross-section value:
>> 179 operation->SetBiasedCrossSection( XStransformation * analogXS );
>> 180 // -- forces recomputation of the 'interaction length' taking into account above
>> 181 // -- new cross-section value [tricky : to be improved]
>> 182 operation->UpdateForStep( 0.0 );
>> 183 }
162 } 184 }
163 } << 185
164 <<
165 return operation; 186 return operation;
>> 187
166 } 188 }
167 189
168 //....oooOO0OOooo........oooOO0OOooo........oo 190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
169 191
170 void GB01BOptrChangeCrossSection::OperationApp << 192 void GB01BOptrChangeCrossSection::
171 << 193 OperationApplied(const G4BiasingProcessInterface* callingProcess,
172 << 194 G4BiasingAppliedCase,
173 << 195 G4VBiasingOperation* occurenceOperationApplied,
174 << 196 G4double,
>> 197 G4VBiasingOperation*,
>> 198 const G4VParticleChange* )
175 { 199 {
176 G4BOptnChangeCrossSection* operation = fChan 200 G4BOptnChangeCrossSection* operation = fChangeCrossSectionOperations[callingProcess];
177 if (operation == occurenceOperationApplied) << 201 if ( operation == occurenceOperationApplied ) operation->SetInteractionOccured();
178 } 202 }
179 203
180 //....oooOO0OOooo........oooOO0OOooo........oo 204 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
181 205