Gabriele Cosmo
165 lines
6.6 KiB
C++
165 lines
6.6 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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// G4SingleParticleSource
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//
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// Class description:
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//
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// The Single Particle Source is designed to extend the functionality of the
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// G4ParticleGun class. It is designed to allow specification of input
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// particles in terms of position, direction (or angular) and energy
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// distributions. It is used by the General Particle source class
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// and it is derived from G4VPrimaryGenerator.
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//
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// Note on thread safety:
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// G4SingleParticleSource instances can be shared among threads.
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// GeneratePrimaryVertex is protected via a mutex because underlying
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// generators are not assumed to be thread-safe.
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// Note that internal status of this class is assumed to be changed by
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// master thread (typically via UI commands)
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// Only one thread should use the set-methods here.
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// If you use the set methods to set defaults in your
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// application take care that only one thread is executing them.
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// In addition take care of calling these methods before the run is started
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// Do not use these setters during the event loop
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// Author: Fan Lei, QinetiQ ltd.
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// Customer: ESA/ESTEC
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// History:
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// - 05/02/2004, Fan Lei - Created.
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// Based on the G4GeneralParticleSource class
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// - 06/06/2014, Andrea Dotti
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// Added a mutex to protect access to shared resources (data members)
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// --------------------------------------------------------------------
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#ifndef G4SingleParticleSource_hh
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#define G4SingleParticleSource_hh 1
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#include "G4VPrimaryGenerator.hh"
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#include "G4ParticleMomentum.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4SPSPosDistribution.hh"
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#include "G4SPSAngDistribution.hh"
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#include "G4SPSEneDistribution.hh"
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#include "G4SPSRandomGenerator.hh"
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#include "G4Threading.hh"
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#include "G4Cache.hh"
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class G4SingleParticleSource : public G4VPrimaryGenerator
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{
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public:
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G4SingleParticleSource();
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// Constructor: initializes variables and instantiates the
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// messenger and navigator classes
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~G4SingleParticleSource() override;
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// Destructor: deletes messenger and prints out run information
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void GeneratePrimaryVertex(G4Event *evt) override;
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// Generate the particles initial parameters
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inline G4SPSPosDistribution* GetPosDist() const { return posGenerator; }
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// Return a pointer to the position distribution generator
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inline G4SPSAngDistribution* GetAngDist() const { return angGenerator; }
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// Return a pointer to the angular distribution generator
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inline G4SPSEneDistribution* GetEneDist() const { return eneGenerator; }
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// Return a pointer to the energy distribution generator
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inline G4SPSRandomGenerator* GetBiasRndm() const { return biasRndm; }
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// Return a pointer to the biased random number generator
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void SetVerbosity(G4int);
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// Set the verbosity level
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void SetParticleDefinition(G4ParticleDefinition* aParticleDefinition);
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inline G4ParticleDefinition* GetParticleDefinition() const
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{ return definition; }
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// Get/Set the particle definition of the primary track
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inline void SetParticleCharge(G4double aCharge) { charge = aCharge; }
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// Set the charge state of the primary track
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inline void SetParticlePolarization(const G4ThreeVector& aVal)
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{ polarization = aVal; }
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inline const G4ThreeVector& GetParticlePolarization() const
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{ return polarization; }
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// Set/Get the polarization state of the primary track
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inline void SetParticleTime(G4double aTime) { time = aTime; }
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inline G4double GetParticleTime() const { return time; }
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// Set/Get the Time
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inline void SetNumberOfParticles(G4int i)
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{ NumberOfParticlesToBeGenerated = i; }
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inline G4int GetNumberOfParticles() const
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{ return NumberOfParticlesToBeGenerated; }
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// Set/get the number of particles to be generated in the primary track
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inline G4ThreeVector GetParticlePosition() const
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{ return ParticleProperties.Get().position; }
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inline G4ThreeVector GetParticleMomentumDirection() const
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{ return ParticleProperties.Get().momentum_direction; }
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inline G4double GetParticleEnergy() const
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{ return ParticleProperties.Get().energy; }
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// Get the position, direction, and energy of the current particle
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private:
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G4SPSPosDistribution* posGenerator = nullptr;
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G4SPSAngDistribution* angGenerator = nullptr;
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G4SPSEneDistribution* eneGenerator = nullptr;
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G4SPSRandomGenerator* biasRndm = nullptr;
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// Other particle properties
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// These need to be thread-local because a getter for them exits
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//
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struct part_prop_t
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{
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G4ParticleMomentum momentum_direction;
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G4double energy;
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G4ThreeVector position;
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part_prop_t();
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};
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G4Cache<part_prop_t> ParticleProperties;
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G4int NumberOfParticlesToBeGenerated;
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G4ParticleDefinition* definition = nullptr;
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G4double charge;
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G4double time;
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G4ThreeVector polarization;
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G4int verbosityLevel;
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// Verbosity
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G4Mutex mutex;
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// This can be a shared resource.
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// This mutex is uses in GeneratePrimaryVertex
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};
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#endif
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