G4SynchrotronRadiation.hh

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// ------------------------------------------------------------
//      GEANT 4 class header file
//      CERN Geneva Switzerland
//
//
//      History:
//      21-5-98  1 version , V. Grichine
//      28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
//      23-05-06, H. Burkhardt: Energy spectrum from function rather than table
//
//
// ------------------------------------------------------------
 
#ifndef G4SynchrotronRadiation_h
#define G4SynchrotronRadiation_h 1
 
#include "G4ios.hh"
#include "globals.hh"
#include "Randomize.hh"
#include "G4VDiscreteProcess.hh"
#include "G4TransportationManager.hh"
#include "G4FieldManager.hh"
#include "G4Field.hh"
#include "G4ThreeVector.hh"
#include "G4PropagatorInField.hh"
 
#include "G4Track.hh"
#include "G4Step.hh"
 
#include "G4Gamma.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
 
class G4VEmAngularDistribution;
class G4LossTableManager;
 
class G4SynchrotronRadiation : public G4VDiscreteProcess
{
public:
 
  explicit G4SynchrotronRadiation(const G4String& pName = "SynRad",
                 G4ProcessType type = fElectromagnetic);
 
  virtual ~G4SynchrotronRadiation();
 
  virtual G4double GetMeanFreePath( const G4Track& track,
                    G4double previousStepSize,
                    G4ForceCondition* condition ) override;
 
  virtual G4VParticleChange *PostStepDoIt( const G4Track& track,
                       const G4Step& Step    ) override;
 
  G4double GetPhotonEnergy( const G4Track& trackData,
                               const G4Step&  stepData      );
 
  G4double GetRandomEnergySR( G4double, G4double, G4double );
 
  G4double InvSynFracInt(G4double x);
  G4double Chebyshev(G4double a,G4double b,const G4double c[],
             G4int n, G4double x);
 
  virtual G4bool IsApplicable(const G4ParticleDefinition&) override;
  virtual void BuildPhysicsTable(const G4ParticleDefinition& ) override;
  virtual void PrintInfoDefinition();
 
  void SetAngularGenerator(G4VEmAngularDistribution* p);
 
private:
 
  G4SynchrotronRadiation & 
    operator=(const G4SynchrotronRadiation &right);
  G4SynchrotronRadiation(const G4SynchrotronRadiation&);
 
  G4LossTableManager*         theManager;
  G4VEmAngularDistribution*   genAngle;
 
  G4ParticleDefinition*       theGamma;
 
  G4PropagatorInField* fFieldPropagator;
  G4bool FirstTime;
  G4bool FirstTime1;
};
 
//////////////////////////  INLINE METHODS  /////////////////////////////
 
inline G4double 
G4SynchrotronRadiation::Chebyshev(G4double a, G4double b, const G4double c[],
                  G4int n, G4double x)
{
  G4double y;
  G4double y2=2.0*(y=(2.0*x-a-b)/(b-a)); // Change of variable.
  G4double d=0.,dd=0.;
  for (G4int j=n-1;j>=1;--j) // Clenshaw's recurrence.
  { G4double sv=d;
    d=y2*d-dd+c[j];
    dd=sv;
  }
  return y*d-dd+0.5*c[0];
}
 
#endif  // end of G4SynchrotronRadiation.hh