Geant4  10.03.p01
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G4EqMagElectricField Class Reference

#include <G4EqMagElectricField.hh>

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Public Member Functions

 G4EqMagElectricField (G4ElectroMagneticField *emField)
 
 ~G4EqMagElectricField ()
 
void SetChargeMomentumMass (G4ChargeState particleCharge, G4double MomentumXc, G4double mass)
 
void EvaluateRhsGivenB (const G4double y[], const G4double Field[], G4double dydx[]) const
 
- Public Member Functions inherited from G4EquationOfMotion
 G4EquationOfMotion (G4Field *Field)
 
virtual ~G4EquationOfMotion ()
 
virtual void EvaluateRhsGivenB (const G4double y[], const G4double B[3], G4double dydx[]) const =0
 
void RightHandSide (const G4double y[], G4double dydx[]) const
 
void EvaluateRhsReturnB (const G4double y[], G4double dydx[], G4double Field[]) const
 
void GetFieldValue (const G4double Point[4], G4double Field[]) const
 
const G4Field * GetFieldObj () const
 
void SetFieldObj (G4Field *pField)
 

Detailed Description

Definition at line 48 of file G4EqMagElectricField.hh.

Constructor & Destructor Documentation

G4EqMagElectricField::G4EqMagElectricField ( G4ElectroMagneticField *  emField)
inline

Definition at line 52 of file G4EqMagElectricField.hh.

53  : G4EquationOfMotion( emField ) {;}
G4EquationOfMotion::G4EquationOfMotion
G4EquationOfMotion(G4Field *Field)
G4EqMagElectricField::~G4EqMagElectricField ( )
inline

Definition at line 55 of file G4EqMagElectricField.hh.

55 {;}

Member Function Documentation

void G4EqMagElectricField::EvaluateRhsGivenB ( const G4double  y[],
const G4double  Field[],
G4double  dydx[] 
) const

Definition at line 58 of file G4EqMagElectricField.cc.

61 {
62 
63  // Components of y:
64  // 0-2 dr/ds,
65  // 3-5 dp/ds - momentum derivatives
66 
67  G4double pSquared = y[3]*y[3] + y[4]*y[4] + y[5]*y[5] ;
68 
69  G4double Energy = std::sqrt( pSquared + fMassCof );
70  G4double cof2 = Energy/c_light ;
71 
72  G4double pModuleInverse = 1.0/std::sqrt(pSquared) ;
73 
74  // G4double inverse_velocity = Energy * c_light * pModuleInverse;
75  G4double inverse_velocity = Energy * pModuleInverse / c_light;
76 
77  G4double cof1 = fElectroMagCof*pModuleInverse ;
78 
79  // G4double vDotE = y[3]*Field[3] + y[4]*Field[4] + y[5]*Field[5] ;
80 
81 
82  dydx[0] = y[3]*pModuleInverse ;
83  dydx[1] = y[4]*pModuleInverse ;
84  dydx[2] = y[5]*pModuleInverse ;
85 
86  dydx[3] = cof1*(cof2*Field[3] + (y[4]*Field[2] - y[5]*Field[1])) ;
87 
88  dydx[4] = cof1*(cof2*Field[4] + (y[5]*Field[0] - y[3]*Field[2])) ;
89 
90  dydx[5] = cof1*(cof2*Field[5] + (y[3]*Field[1] - y[4]*Field[0])) ;
91 
92  dydx[6] = 0.;//not used
93 
94  // Lab Time of flight
95  dydx[7] = inverse_velocity;
96  return ;
97 }
CLHEP::c_light
static constexpr double c_light
Definition: PhysicalConstants.h:55
G4double
double G4double
Definition: G4Types.hh:76
void G4EqMagElectricField::SetChargeMomentumMass ( G4ChargeState  particleCharge,
G4double  MomentumXc,
G4double  mass 
)
virtual

Implements G4EquationOfMotion.

Definition at line 46 of file G4EqMagElectricField.cc.

49 {
50  G4double pcharge = particleCharge.GetCharge();
51  fElectroMagCof = eplus*pcharge*c_light ;
52  fMassCof = particleMass*particleMass ;
53 }
G4ChargeState::GetCharge
G4double GetCharge() const
Definition: G4ChargeState.hh:65
eplus
static constexpr double eplus
Definition: G4SIunits.hh:199
CLHEP::c_light
static constexpr double c_light
Definition: PhysicalConstants.h:55
G4double
double G4double
Definition: G4Types.hh:76

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The documentation for this class was generated from the following files: