Gabriele Cosmo
163 lines
5.3 KiB
C++
163 lines
5.3 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: exampleB01.cc,v 1.23 2006/06/29 16:34:07 gunter Exp $
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// GEANT4 tag $Name: geant4-08-02 $
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 - exampleB01
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//
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// --------------------------------------------------------------
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// Comments
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//
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// This example intends to show how to use importance sampling and scoring
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// in the mass (tracking) geometry.
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// A simple geometry consisting of a 180 cm high concrete cylinder
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// divided into 18 slabs of 10cm each is created.
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// Importance values are assigned to the 18 concrete slabs in the
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// detector construction class for simplicity.
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// Pairs of G4GeometryCell and importance values are stored in
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// the importance store.
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// The G4Scorer is used for the scoring. This is a top level
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// class using the frame work provided for scoring.
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//
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// --------------------------------------------------------------
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#include <iostream>
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#include "G4VPhysicalVolume.hh"
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#include "G4RunManager.hh"
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#include "G4UImanager.hh"
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#include "G4GeometryManager.hh"
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#include "B01DetectorConstruction.hh"
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#include "B01PhysicsList.hh"
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#include "B01PrimaryGeneratorAction.hh"
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// Files specific for biasing and scoring
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#include "G4Scorer.hh"
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#include "G4MassGeometrySampler.hh"
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#include "G4IStore.hh"
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#include "G4VWeightWindowStore.hh"
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#include "G4WeightWindowAlgorithm.hh"
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// a score table
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#include "G4ScoreTable.hh"
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int main(int argc, char **argv)
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{
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G4int mode = 0;
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if (argc>1) mode = atoi(argv[1]);
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std::ostream *myout = &G4cout;
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G4int numberOfEvent = 100;
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G4long myseed = 345354;
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CLHEP::HepRandom::setTheSeed(myseed);
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G4RunManager *runManager = new G4RunManager;
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// create the detector ---------------------------
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B01DetectorConstruction *detector = new B01DetectorConstruction();
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runManager->SetUserInitialization(detector);
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// ---------------------------------------------------
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runManager->SetUserInitialization(new B01PhysicsList);
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runManager->SetUserAction(new B01PrimaryGeneratorAction);
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runManager->Initialize();
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// pointers for importance store, weight-window store
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// and weight-window algorithm
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//
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G4VIStore *aIstore = 0;
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G4VWeightWindowStore *aWWstore = 0;
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G4VWeightWindowAlgorithm *wwAlg = 0;
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// use a scorer
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//
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G4Scorer scorer;
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// create sampler for biasing and scoring in the mass geometry
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//
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G4MassGeometrySampler mgs("neutron");
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mgs.PrepareScoring(&scorer);
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if (mode == 0)
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{
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// prepare for importance sampling
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//
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aIstore = detector->CreateImportanceStore();
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mgs.PrepareImportanceSampling(aIstore, 0);
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}
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else
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{
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// prepare for weight window technique
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// in this case the algoritm is initialized such that
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// the weight window tehcnique does exactly the same as
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// the importance sampling technique, therefore
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// the place of action ( the locations where
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// splitting and Russian roulette are to be applied)
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// is chosen to be on the boundary between cells.
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//
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aWWstore = detector->CreateWeightWindowStore();
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wwAlg = new G4WeightWindowAlgorithm(1, // upper limit factor
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1, // survival factor
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100); // max. number of splitting
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mgs.PrepareWeightWindow(aWWstore, wwAlg, onBoundary); // place of action
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}
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mgs.Configure();
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runManager->BeamOn(numberOfEvent);
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// print a table of the scores
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//
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G4ScoreTable sp(aIstore);
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sp.Print(scorer.GetMapGeometryCellCellScorer(), myout);
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// open geometry for clean biasing stores clean-up
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//
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G4GeometryManager::GetInstance()->OpenGeometry();
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if (aIstore) {
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delete aIstore;
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}
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if (aWWstore) {
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delete aWWstore;
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}
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if (wwAlg) {
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delete wwAlg;
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}
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mgs.ClearSampling();
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delete runManager;
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return 0;
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}
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