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geant4/examples/extended/biasing/B02/exampleB02.cc
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2016-06-09 14:44:26 +02:00

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//
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// $Id: exampleB02.cc,v 1.20 2006/06/29 16:34:23 gunter Exp $
// GEANT4 tag $Name: geant4-08-01 $
//
//
// --------------------------------------------------------------
// GEANT 4 - exampleB02
//
// --------------------------------------------------------------
// Comments
//
// This example intends to show how to use both importance sampling and a
// customized scoring making use of the scoring framework
// in a parallel geometry.
//
// A simple geometry consisting of a 180 cm high concrete cylinder
// is constructed in the mass geometry.
// A geometry is constructed in the parallel geometry
// in order to assign importance values to slabs
// of width 10cm and for scoring. The parallel world volume should
// overlap the mass world volume and the radii of the slabs is larger
// than the radius of the concrete cylinder in the mass geometry.
// Pairs of G4GeometryCell and importance values are stored in
// the importance store.
// The scoring uses the G4CellSCorer and one customized scorer for
// the last slab.
//
//
// --------------------------------------------------------------
#include <iostream>
#include "G4VPhysicalVolume.hh"
#include "G4RunManager.hh"
#include "G4UImanager.hh"
#include "B02DetectorConstruction.hh"
#include "B02PhysicsList.hh"
#include "B02PrimaryGeneratorAction.hh"
// construction for the parallel geometry
#include "B02ImportanceDetectorConstruction.hh"
// Files specific for biasing and scoring
#include "G4Scorer.hh"
#include "G4ParallelGeometrySampler.hh"
#include "G4IStore.hh"
// customized scorer and store
#include "B02CellScorer.hh"
#include "B02CellScorerStore.hh"
// a score table
#include "G4ScoreTable.hh"
// AIDA stuff
#include "AIDA/IAnalysisFactory.h"
#include "AIDA/ITree.h"
#include "AIDA/ITreeFactory.h"
#include "AIDA/IHistogram1D.h"
#include "AIDA/IHistogramFactory.h"
int main(int , char **)
{
std::ostream *myout = &G4cout;
G4int numberOfEvent = 100;
G4long myseed = 345354;
CLHEP::HepRandom::setTheSeed(myseed);
G4RunManager *runManager = new G4RunManager;
// create the detector ---------------------------
B02DetectorConstruction *detector = new B02DetectorConstruction();
runManager->SetUserInitialization(detector);
// ---------------------------------------------------
runManager->SetUserInitialization(new B02PhysicsList);
runManager->SetUserAction(new B02PrimaryGeneratorAction);
// runManager->Initialize();
// create a parallel detector
B02ImportanceDetectorConstruction *pdet =
new B02ImportanceDetectorConstruction;
runManager->Initialize();
// create an importance
G4IStore aIstore(pdet->GetWorldVolume());
// create a geometry cell for the world volume replpicanumber is 0!
G4GeometryCell gWorldVolumeCell(pdet->GetWorldVolume(), 0);
// set world volume importance to 1
aIstore.AddImportanceGeometryCell(1, gWorldVolumeCell);
// create a customized cell scorer store
B02CellScorerStore b02store;
// set importance values and create scorers
G4int cell(1);
for (cell=1; cell<=18; cell++) {
G4GeometryCell gCell = pdet->GetGeometryCell(cell);
G4double imp = std::pow(2.0,cell-1);
aIstore.AddImportanceGeometryCell(imp, gCell);
// adding the standard G4CellScorer for 17 concrete cells
if (cell<18) {
b02store.AddG4CellScorer(gCell);
}
}
// create a histogram for a special scorer for the last cell
AIDA::IAnalysisFactory *af = AIDA_createAnalysisFactory();
AIDA::ITreeFactory *tf = af->createTreeFactory();
AIDA::ITree *tree = tf->create("b02.hbook", "hbook",false,true);
AIDA::IHistogramFactory *hf = af->createHistogramFactory( *tree );
AIDA::IHistogram1D *h =
hf->createHistogram1D("10","w*sl vs. e", 30, 0., 20*MeV);
// create a special scorer for the last cell
B02CellScorer b02scorer(h);
// creating the geometry cell and add both to the store
G4GeometryCell gCell = pdet->GetGeometryCell(18);
b02store.AddB02CellScorer(&b02scorer, gCell);
// create importance geometry cell pair for the "rest"cell
// with the same importance as the last concrete cell
gCell = pdet->GetGeometryCell(19);
G4double imp = std::pow(2.0,18);
aIstore.AddImportanceGeometryCell(imp, gCell);
// create the importance and scoring sampler for biasing and scoring
// in the parallel world
G4CellStoreScorer scorer(b02store);
G4ParallelGeometrySampler pgs(pdet->GetWorldVolume(),
"neutron");
pgs.PrepareScoring(&scorer);
pgs.PrepareImportanceSampling(&aIstore, 0);
pgs.Configure();
runManager->BeamOn(numberOfEvent);
// print a table of the scores
G4ScoreTable sp(&aIstore);
sp.Print(b02store.GetMapGeometryCellCellScorer(), myout);
tree->commit();
tree->close();
delete af;
delete tf;
delete tree;
pgs.ClearSampling();
delete runManager;
return 0;
}