Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/include/G4HelixHeum.hh

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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 25 //
 26 // G4HelixHeum
 27 //
 28 // Class description:
 29 //
 30 // Simple Heum stepper for magnetic field:
 31 //     x_1 = x_0 +
 32 //           h * 1/4 * dx(t0,x0)  +
 33 //               3/4 * dx(t0+2/3*h, x0+2/3*h*(dx(t0+h/3,x0+h/3*dx(t0,x0)))) 
 34 // Third order solver.
 35 
 36 // Author: W.Wander <wwc@mit.edu>, 03/11/1998
 37 // -------------------------------------------------------------------
 38 #ifndef G4HELIXHEUM_HH
 39 #define G4HELIXHEUM_HH
 40 
 41 #include "G4MagHelicalStepper.hh"
 42 
 43 class G4HelixHeum : public G4MagHelicalStepper
 44 {
 45   public:
 46 
 47     G4HelixHeum(G4Mag_EqRhs *EqRhs);
 48    ~G4HelixHeum() override;
 49   
 50     void DumbStepper( const G4double y[],
 51                             G4ThreeVector Bfld,
 52                             G4double      h,
 53                             G4double      yout[] ) override;
 54 
 55     inline G4int IntegratorOrder() const override { return 2; }
 56 };
 57 
 58 #endif
 59