lars/geant4
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Import Geant4 11.0.0 source tree

Browse Source
This commit is contained in:
Gabriele Cosmo
2021-12-10 14:46:44 +01:00
committed by Ben Morgan
parent 6399a014b6
commit 80e2389dd8
3932 changed files with 202519 additions and 246221 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/processes/electromagnetic/adjoint/src/G4AdjointForcedInteractionForGamma.cc
+12 -7
View File
@@ -103,6 +103,7 @@ G4VParticleChange* G4AdjointForcedInteractionForGamma::PostStepDoIt(
// Selection of the model to be called
G4VEmAdjointModel* theSelectedModel = nullptr;
G4bool is_scat_proj_to_proj_case = false;
G4double factor=1.;
if(!fAdjointComptonModel && !fAdjointBremModel)
return fParticleChange;
if(!fAdjointComptonModel)
@@ -120,30 +121,32 @@ G4VParticleChange* G4AdjointForcedInteractionForGamma::PostStepDoIt(
is_scat_proj_to_proj_case = true;
}
else
{ // Choose the model according to cross sections
{ // Choose the model according to a 50-50 % probability
G4double bremAdjCS = fAdjointBremModel->AdjointCrossSection(
track.GetMaterialCutsCouple(), track.GetKineticEnergy(), false);
if(G4UniformRand() * fLastAdjCS < bremAdjCS)
if(G4UniformRand() < 0.5)
{
theSelectedModel = fAdjointBremModel;
is_scat_proj_to_proj_case = false;
factor=bremAdjCS/fLastAdjCS/0.5;
}
else
{
theSelectedModel = fAdjointComptonModel;
is_scat_proj_to_proj_case = true;
factor=(fLastAdjCS-bremAdjCS)/fLastAdjCS/0.5;
}
}
// Compute the weight correction factor
G4double invEffectiveAdjointCS =
(1. - std::exp(fNbAdjIntLength - fTotNbAdjIntLength)) / fLastAdjCS;
(1. - std::exp(fNbAdjIntLength - fTotNbAdjIntLength)) / fLastAdjCS/fCSBias;
// Call the selected model without correction of the weight in the model
theSelectedModel->SetCorrectWeightForPostStepInModel(false);
theSelectedModel
->SetAdditionalWeightCorrectionFactorForPostStepOutsideModel(
fLastAdjCS * invEffectiveAdjointCS);
factor*fLastAdjCS * invEffectiveAdjointCS);
theSelectedModel->SampleSecondaries(track, is_scat_proj_to_proj_case,
fParticleChange);
theSelectedModel->SetCorrectWeightForPostStepInModel(true);
@@ -183,8 +186,8 @@ G4VParticleChange* G4AdjointForcedInteractionForGamma::AlongStepDoIt(
else
{
G4double previous_acc_nb_adj_interaction_length = fNbAdjIntLength;
fNbAdjIntLength += nb_adj_interaction_length_over_step;
theNumberOfInteractionLengthLeft -= nb_adj_interaction_length_over_step;
fNbAdjIntLength += fCSBias*nb_adj_interaction_length_over_step;
theNumberOfInteractionLengthLeft -= fCSBias*nb_adj_interaction_length_over_step;
// protection against rare race condition
if(std::abs(fTotNbAdjIntLength - previous_acc_nb_adj_interaction_length) <=
@@ -253,6 +256,8 @@ G4AdjointForcedInteractionForGamma::PostStepGetPhysicalInteractionLength(
{ // compute the interaction length for forced interaction
if(step_id == 1)
{
fCSBias=0.000001/fTotNbAdjIntLength;
fTotNbAdjIntLength*=fCSBias;
G4double min_val = std::exp(-fTotNbAdjIntLength);
theNumberOfInteractionLengthLeft =
-std::log(min_val + G4UniformRand() * (1. - min_val));
@@ -270,7 +275,7 @@ G4AdjointForcedInteractionForGamma::PostStepGetPhysicalInteractionLength(
thePostPhysVolume->GetLogicalVolume()->GetMaterialCutsCouple());
}
if(postCS > 0.)
return theNumberOfInteractionLengthLeft / postCS;
return theNumberOfInteractionLengthLeft / postCS /fCSBias;
else
return DBL_MAX;
}