Gabriele Cosmo
318 lines
15 KiB
C++
318 lines
15 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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// $Id$
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//
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/////////////////////////////////////////////////////////////////////////////////
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// Class Name: G4AdjointSimManager.hh
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// Author: L. Desorgher
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// Organisation: SpaceIT GmbH
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// Contract: ESA contract 21435/08/NL/AT
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// Customer: ESA/ESTEC
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/////////////////////////////////////////////////////////////////////////////////
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//
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// CHANGE HISTORY
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// --------------
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// ChangeHistory:
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// -15-01-2007 creation by L. Desorgher
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// -March 2008 Redesigned as a non RunManager. L. Desorgher
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// -01-11-2009 Add the possibility to use user defined run, event, tracking, stepping,
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// and stacking actions during the adjoint tracking phase. L. Desorgher
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//
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//
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//
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//-------------------------------------------------------------
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// Documentation:
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// This class represents the Manager of an adjoint/reverse MC simulation.
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// An adjoint run is divided in a serie of alternative adjoint and forward tracking
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// of adjoint and normal particles.
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//
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// Reverse tracking phase:
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// -----------------------
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// An adjoint particle of a given type (adjoint_e-, adjoint_gamma,...) is first generated on the so called adjoint source
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// with a random energy (1/E distribution) and direction. The adjoint source is the
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// external surface of a user defined volume or of a user defined sphere. The adjoint
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// source should contain one or several sensitive volumes and should be small
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// compared to the entire geometry.
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// The user can set the min and max energy of the adjoint source. After its
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// generation the adjoint primary particle is tracked
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// bacward in the geometry till a user defined external surface (spherical or boundary of a volume)
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// or is killed before if it reaches a user defined upper energy limit that represents
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// the maximum energy of the external source. During the reverse tracking, reverse
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// processes take place where the adjoint particle being tracked can be either scattered
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// or transformed in another type of adjoint paticle. During the reverse tracking the
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// G4SimulationManager replaces the user defined Primary, Run, ... actions, by its own actions.
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//
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// Forward tracking phase
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// -----------------------
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// When an adjoint particle reaches the external surface its weight,type, position,
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// and directions are registered and a normal primary particle with a type equivalent to the last generated primary adjoint is
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// generated with the same energy, position but opposite direction and is tracked normally in the sensitive region as in a fwd MC simulation.
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// During this forward tracking phase the
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// event, stacking, stepping, tracking actions defined by the user for its general fwd application are used. By this clear separation between
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// adjoint and fwd tracking phases , the code of the user developed for a fwd simulation should be only slightly modified to adapt it for an adjoint
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// simulation. Indeed the computation of the signal is done by the same actions or classes that the one used in the fwd simulation mode.
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//
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// Modification to brought in a existing G4 application to use the ReverseMC method
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// -------------------------------
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// In order to be able to use the ReverseMC method in his simulation, the user should modify its code as such:
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// 1) Adapt its physics list to use ReverseProcesses for adjoint particles. An example of such physics list is provided in an extended
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// example.
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// 2) Create an instance of G4AdjointSimManager somewhere in the main code.
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// 3) Modify the analysis part of the code to normalise the signal computed during the fwd phase to the weight of the last adjoint particle
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// that reaches the external surface. This is done by using the following method of G4AdjointSimManager.
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//
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// G4int GetIDOfLastAdjParticleReachingExtSource()
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// G4ThreeVector GetPositionAtEndOfLastAdjointTrack(){ return last_pos;}
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// G4ThreeVector GetDirectionAtEndOfLastAdjointTrack(){ return last_direction;}
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// G4double GetEkinAtEndOfLastAdjointTrack(){ return last_ekin;}
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// G4double GetEkinNucAtEndOfLastAdjointTrack(){ return last_ekin_nuc;}
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// G4double GetWeightAtEndOfLastAdjointTrack(){return last_weight;}
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// G4double GetCosthAtEndOfLastAdjointTrack(){return last_cos_th;}
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// G4String GetFwdParticleNameAtEndOfLastAdjointTrack(){return last_fwd_part_name;}
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// G4int GetFwdParticlePDGEncodingAtEndOfLastAdjointTrack(){return last_fwd_part_PDGEncoding;}
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// G4int GetFwdParticleIndexAtEndOfLastAdjointTrack().
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//
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// In orther to have a code working for both forward and adjoint simulation mode, the extra code needed in user actions for the adjoint
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// simulation mode can be seperated to the code needed only for the normal forward simulation by using the following method
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//
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// G4bool GetAdjointSimMode() that return true if an adjoint simulation is running and false if not!
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//
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// Example of modification in the analysis part of the code:
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// -------------------------------------------------------------
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// Let say that in the forward simulation a G4 application computes the energy deposited in a volume.
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// The user wants to normalise its results for an external isotropic source of e- with differential spectrum given by f(E).
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// A possible modification of the code where the deposited energy Edep during an event is registered would be the following
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//
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// G4AdjointSimManager* theAdjSimManager = G4AdjointSimManager::GetInstance();
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// if (theAdjSimManager->GetAdjointSimMode()) {
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// //code of the user that should be consider only for forwrad simulation
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// G4double normalised_edep = 0.;
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// if (theAdjSimManager->GetFwdParticleNameAtEndOfLastAdjointTrack() == "e-"){
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// G4double ekin_prim = theAdjSimManager->GetEkinAtEndOfLastAdjointTrack();
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// G4double weight_prim = theAdjSimManager->GetWeightAtEndOfLastAdjointTrack();
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// normalised_edep = weight_prim*f(ekin_prim);
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// }
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// //then follow the code where normalised_edep is printed, or registered or whatever ....
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// }
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//
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// else { //code of the user that should be consider only for forward simulation
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// }
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// Note that in this example a normalisation to only primary e- with only one spectrum f(E) is considered. The example code could be easily
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// adapted for a normalisatin to several spectra and several type of primary particles in the same simulation.
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//
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#ifndef G4AdjointSimManager_h
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#define G4AdjointSimManager_h 1
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#include "globals.hh"
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#include "G4ThreeVector.hh"
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#include <vector>
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class G4UserEventAction;
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class G4VUserPrimaryGeneratorAction;
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class G4UserTrackingAction;
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class G4UserSteppingAction;
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class G4UserStackingAction;
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class G4UserRunAction;
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class G4AdjointRunAction;
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class G4AdjointPrimaryGeneratorAction;
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class G4AdjointSteppingAction;
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class G4AdjointEventAction;
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class G4AdjointStackingAction;
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class G4ParticleDefinition;
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class G4AdjointSimMessenger;
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class G4PhysicsLogVector;
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class G4AdjointSimManager
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{
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public:
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static G4AdjointSimManager* GetInstance();
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public: //publich methods
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void RunAdjointSimulation(G4int nb_evt);
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inline G4int GetNbEvtOfLastRun(){return nb_evt_of_last_run;}
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void SetAdjointTrackingMode(G4bool aBool);
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inline G4bool GetAdjointTrackingMode(){return adjoint_tracking_mode;} //true if an adjoint track is being processed
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inline G4bool GetAdjointSimMode(){return adjoint_sim_mode;} //true if an adjoint simulation is running
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G4bool GetDidAdjParticleReachTheExtSource();
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void RegisterAtEndOfAdjointTrack();
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void RegisterAdjointPrimaryWeight(G4double aWeight);
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inline G4int GetIDOfLastAdjParticleReachingExtSource(){return ID_of_last_particle_that_reach_the_ext_source;};
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inline G4ThreeVector GetPositionAtEndOfLastAdjointTrack(){ return last_pos;}
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inline G4ThreeVector GetDirectionAtEndOfLastAdjointTrack(){ return last_direction;}
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inline G4double GetEkinAtEndOfLastAdjointTrack(){ return last_ekin;}
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inline G4double GetEkinNucAtEndOfLastAdjointTrack(){ return last_ekin_nuc;}
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inline G4double GetWeightAtEndOfLastAdjointTrack(){return last_weight;}
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inline G4double GetCosthAtEndOfLastAdjointTrack(){return last_cos_th;}
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inline const G4String& GetFwdParticleNameAtEndOfLastAdjointTrack(){return last_fwd_part_name;}
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inline G4int GetFwdParticlePDGEncodingAtEndOfLastAdjointTrack(){return last_fwd_part_PDGEncoding;}
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inline G4int GetFwdParticleIndexAtEndOfLastAdjointTrack(){return last_fwd_part_index;}
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std::vector<G4ParticleDefinition*> GetListOfPrimaryFwdParticles();
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G4bool DefineSphericalExtSource(G4double radius, G4ThreeVector pos);
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G4bool DefineSphericalExtSourceWithCentreAtTheCentreOfAVolume(G4double radius, const G4String& volume_name);
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G4bool DefineExtSourceOnTheExtSurfaceOfAVolume(const G4String& volume_name);
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void SetExtSourceEmax(G4double Emax);
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//Definition of adjoint source
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//----------------------------
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G4bool DefineSphericalAdjointSource(G4double radius, G4ThreeVector pos);
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G4bool DefineSphericalAdjointSourceWithCentreAtTheCentreOfAVolume(G4double radius, const G4String& volume_name);
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G4bool DefineAdjointSourceOnTheExtSurfaceOfAVolume(const G4String& volume_name);
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void SetAdjointSourceEmin(G4double Emin);
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void SetAdjointSourceEmax(G4double Emax);
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inline G4double GetAdjointSourceArea(){return area_of_the_adjoint_source;}
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void ConsiderParticleAsPrimary(const G4String& particle_name);
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void NeglectParticleAsPrimary(const G4String& particle_name);
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void SetPrimaryIon(G4ParticleDefinition* adjointIon, G4ParticleDefinition* fwdIon);
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const G4String& GetPrimaryIonName();
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inline void SetNormalisationMode(G4int n){normalisation_mode=n;};
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G4int GetNormalisationMode(){return normalisation_mode;};
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G4double GetNumberNucleonsInIon(){return nb_nuc;};
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//Definition of user actions for the adjoint tracking phase
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//----------------------------
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void SetAdjointEventAction(G4UserEventAction* anAction);
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void SetAdjointSteppingAction(G4UserSteppingAction* anAction);
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void SetAdjointStackingAction(G4UserStackingAction* anAction);
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void SetAdjointTrackingAction(G4UserTrackingAction* anAction);
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void SetAdjointRunAction(G4UserRunAction* anAction);
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//Set methods for user run actions
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//--------------------------------
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inline void UseUserStackingActionInFwdTrackingPhase(G4bool aBool){use_user_StackingAction=aBool;}
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//Convergence test
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//-----------------------
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/*
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void RegisterSignalForConvergenceTest(G4double aSignal);
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void DefineExponentialPrimarySpectrumForConvergenceTest(G4ParticleDefinition* aPartDef, G4double E0);
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void DefinePowerLawPrimarySpectrumForConvergenceTest(G4ParticleDefinition* aPartDef, G4double alpha);
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*/
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private:
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static G4AdjointSimManager* instance;
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private: // methods
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void SetRestOfAdjointActions();
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void SetAdjointPrimaryRunAndStackingActions();
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void ResetRestOfUserActions();
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void ResetUserPrimaryRunAndStackingActions();
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void DefineUserActions();
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private: //constructor and destructor
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G4AdjointSimManager();
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~G4AdjointSimManager();
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private ://attributes
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//Messenger
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//----------
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G4AdjointSimMessenger* theMessenger;
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//user defined actions for the normal fwd simulation. Taken from the G4RunManager
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//-------------------------------------------------
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bool user_action_already_defined;
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G4UserRunAction* fUserRunAction;
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G4UserEventAction* fUserEventAction;
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G4VUserPrimaryGeneratorAction* fUserPrimaryGeneratorAction;
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G4UserTrackingAction* fUserTrackingAction;
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G4UserSteppingAction* fUserSteppingAction;
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G4UserStackingAction* fUserStackingAction;
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bool use_user_StackingAction; //only for fwd part of the adjoint simulation
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//action for adjoint simulation
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//-----------------------------
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G4UserRunAction* theAdjointRunAction;
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G4UserEventAction* theAdjointEventAction;
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G4AdjointPrimaryGeneratorAction* theAdjointPrimaryGeneratorAction;
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G4UserTrackingAction* theAdjointTrackingAction;
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G4AdjointSteppingAction* theAdjointSteppingAction;
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G4AdjointStackingAction* theAdjointStackingAction;
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//adjoint mode
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//-------------
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G4bool adjoint_tracking_mode;
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G4bool adjoint_sim_mode;
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//adjoint particle information on the external surface
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//-----------------------------
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G4ThreeVector last_pos;
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G4ThreeVector last_direction;
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G4double last_ekin,last_ekin_nuc; //last_ekin_nuc=last_ekin/nuc, nuc is 1 if not a nucleus
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G4double last_cos_th;
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G4String last_fwd_part_name;
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G4int last_fwd_part_PDGEncoding;
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G4int last_fwd_part_index;
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G4double last_weight;
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G4int ID_of_last_particle_that_reach_the_ext_source;
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G4int nb_evt_of_last_run;
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G4int normalisation_mode;
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//Adjoint source
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//--------------
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G4double area_of_the_adjoint_source;
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G4double nb_nuc;
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G4double theAdjointPrimaryWeight;
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//Weight Analysis
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//----------
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G4PhysicsLogVector* electron_last_weight_vector;
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G4PhysicsLogVector* proton_last_weight_vector;
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G4PhysicsLogVector* gamma_last_weight_vector;
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G4bool welcome_message;
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/* For the future
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//Convergence test
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//----------------
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G4double normalised_signal;
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G4double error_signal;
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G4bool convergence_test_is_used;
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G4bool power_law_spectrum_for_convergence_test; // true PowerLaw, ;
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G4ParticleDefinition* the_par_def_for_convergence_test;
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*/
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};
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#endif
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