85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
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// LOW ENERGY MUON SPIN RELAXATION, ROTATION, RADIATION
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//
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// ID :LEMuSRElMag_SpinEqRhs.hh , v 1.3
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// AUTHOR: Taofiq PARAISO
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// DATE : 2004-09-17 10:20
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
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//
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// & &&&&&&&&&& &&&&&&& &&&&&&&&
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// & & && && & &&
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// & & & & & & &&
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// & &&&&&&& & & &&&&&& &&&&&&&&
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// & & & && & & &&
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// & & && & & && && & &
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// &&&&&&&&&& &&&&&&&&&& & &&&&& && &&&&&&& & &&
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// &
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// &
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// &
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// &
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// ElectroMagnetic Spin Equation
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
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/**
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* This class defines the motion equation to use to calculate the evolution of a
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* particle in an electromagnetic field. The derivatives vector is calculated for
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* the electric field, and for the magnetic field, taking into account the spin precession
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* and the time evolution.
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*/
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#ifndef LEMuSRELMAG_SPIN_EQRHS
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#define LEMuSRELMAG_SPIN_EQRHS 1
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#include "G4Types.hh"
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#include "G4Mag_EqRhs.hh"
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#include "G4SteppingManager.hh" // Include from 'tracking'
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#include "G4TrackingManager.hh" // Include from 'tracking'
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#include "LEMuSRTrackingAction.hh"
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#include "LEMuSRSteppingAction.hh"
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#include "G4EventManager.hh"
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#include "G4TrackingManager.hh"
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#include "G4Track.hh"
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#include "G4ParticleDefinition.hh" // Include from 'tracking'
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class G4MagneticField;
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class LEMuSRElMag_SpinEqRhs : public G4Mag_EqRhs
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{
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public: // with description
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//! Constructor.
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LEMuSRElMag_SpinEqRhs( G4MagneticField* MagField );
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//! Destructor.
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~LEMuSRElMag_SpinEqRhs();
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// Constructor and destructor. No actions.
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//! Set constant particle parameters
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void SetChargeMomentumMass(G4double particleCharge, // in e+ units
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G4double MomentumXc,
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G4double mass);
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//! Calculate derivatives.
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void EvaluateRhsGivenB( const G4double y[],
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const G4double B[3],
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G4double dydx[] ) const;
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// Given the value of the electromagnetic field B, this function
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// calculates the value of the derivative dydx.
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private:
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G4double omegac;
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G4double anomaly;
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G4double ParticleCharge;
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G4double E;
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G4double gamma, m_mass;
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G4double beta;
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G4double cst;
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G4double oldomegac; //for debugging :: to remove
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};
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#endif
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