G4MonopoleEquation Class Reference

#include <G4MonopoleEquation.hh>

Inheritance diagram for G4MonopoleEquation:

Public Member Functions
	G4MonopoleEquation (G4ElectroMagneticField *emField)
	~G4MonopoleEquation ()
virtual void	SetChargeMomentumMass (G4ChargeState particleChargeState, G4double momentum, G4double mass)
virtual 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 54 of file G4MonopoleEquation.hh.

Constructor & Destructor Documentation

G4MonopoleEquation::G4MonopoleEquation

(

G4ElectroMagneticField *

emField

)

Definition at line 65 of file G4MonopoleEquation.cc.

      : G4EquationOfMotion( emField ) 
{}

G4MonopoleEquation::~G4MonopoleEquation

(

)

Definition at line 71 of file G4MonopoleEquation.cc.

{}

Member Function Documentation

void G4MonopoleEquation::EvaluateRhsGivenB ( const G4double  y[], const G4double  Field[], G4double  dydx[]  ) const

virtual

Definition at line 99 of file G4MonopoleEquation.cc.

References python.hepunit::c_light.

{
  // Components of y:
  //    0-2 dr/ds, 
  //    3-5 dp/ds - momentum derivatives 

  G4double pSquared = y[3]*y[3] + y[4]*y[4] + y[5]*y[5] ;

  G4double Energy   = std::sqrt( pSquared + fMassCof );
   
  G4double pModuleInverse  = 1.0/std::sqrt(pSquared);

  G4double inverse_velocity = Energy * pModuleInverse / c_light;

  G4double cofEl     = fElCharge * pModuleInverse ;
  G4double cofMag = fMagCharge * Energy * pModuleInverse; 


  dydx[0] = y[3]*pModuleInverse ;                         
  dydx[1] = y[4]*pModuleInverse ;                         
  dydx[2] = y[5]*pModuleInverse ;                    
     
  // G4double magCharge = twopi * hbar_Planck / (eplus * mu0);    
  // magnetic charge in SI units A*m convention
  //  see http://en.wikipedia.org/wiki/Magnetic_monopole   
  //   G4cout  << "Magnetic charge:  " << magCharge << G4endl;   
  // dp/ds = dp/dt * dt/ds = dp/dt / v = Force / velocity
  // dydx[3] = fMagCharge * Field[0]  * inverse_velocity  * c_light;    
  // multiplied by c_light to convert to MeV/mm
  //     dydx[4] = fMagCharge * Field[1]  * inverse_velocity  * c_light; 
  //     dydx[5] = fMagCharge * Field[2]  * inverse_velocity  * c_light; 
      
  dydx[3] = cofMag * Field[0] + cofEl * (y[4]*Field[2] - y[5]*Field[1]);   
  dydx[4] = cofMag * Field[1] + cofEl * (y[5]*Field[0] - y[3]*Field[2]); 
  dydx[5] = cofMag * Field[2] + cofEl * (y[3]*Field[1] - y[4]*Field[0]); 
   
  //        G4cout << std::setprecision(5)<< "E=" << Energy
  //               << "; p="<< 1/pModuleInverse
  //               << "; mC="<< magCharge
  //               <<"; x=" << y[0]
  //               <<"; y=" << y[1]
  //               <<"; z=" << y[2]
  //               <<"; dydx[3]=" << dydx[3]
  //               <<"; dydx[4]=" << dydx[4]
  //               <<"; dydx[5]=" << dydx[5]
  //               << G4endl;

  dydx[6] = 0.;//not used
   
  // Lab Time of flight
  dydx[7] = inverse_velocity;
  return;
}

void G4MonopoleEquation::SetChargeMomentumMass ( G4ChargeState  particleChargeState, G4double  momentum, G4double  mass  )

virtual

Implements G4EquationOfMotion.

Definition at line 77 of file G4MonopoleEquation.cc.

References python.hepunit::c_light, python.hepunit::eplus, G4ChargeState::GetCharge(), and G4ChargeState::MagneticCharge().

{
   G4double particleMagneticCharge= particleChargeState.MagneticCharge(); 
   G4double particleElectricCharge= particleChargeState.GetCharge(); 

  //   fElCharge = particleElectricCharge;
  fElCharge =eplus* particleElectricCharge*c_light;
   
  fMagCharge =  eplus*particleMagneticCharge*c_light ;

  // G4cout << " G4MonopoleEquation: ElectricCharge=" << particleElectricCharge
  //           << "; MagneticCharge=" << particleMagneticCharge
  //           << G4endl;
 
  fMassCof = particleMass*particleMass ; 
}

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

• G4MonopoleEquation.hh
• G4MonopoleEquation.cc