88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. *
|
|
// * *
|
|
// * This code implementation is the intellectual property of the *
|
|
// * GEANT4 collaboration. *
|
|
// * By copying, distributing or modifying the Program (or any work *
|
|
// * based on the Program) you indicate your acceptance of this *
|
|
// * statement, and all its terms. *
|
|
// ********************************************************************
|
|
//
|
|
//
|
|
// $Id: G4El_EqRhs.hh,v 1.8 2003/11/05 12:54:13 japost Exp $
|
|
// GEANT4 tag $Name: geant4-06-00-patch-01 $
|
|
//
|
|
//
|
|
// class G4El_EqRhs
|
|
//
|
|
// Class description:
|
|
//
|
|
// The "standard" equation of motion of a particle in a pure electric field.
|
|
|
|
// History:
|
|
// - Created. J.Apostolakis, January 13th 1997
|
|
// --------------------------------------------------------------------
|
|
|
|
#ifndef G4_EL_EQRHS_DEF
|
|
#define G4_EL_EQRHS_DEF
|
|
|
|
#include "G4Types.hh"
|
|
#include "G4EquationOfMotion.hh"
|
|
|
|
class G4ElectricField;
|
|
|
|
class G4El_EqRhs : public G4EquationOfMotion
|
|
{
|
|
public: // with description
|
|
|
|
G4El_EqRhs( G4ElectricField *elField );
|
|
virtual ~G4El_EqRhs();
|
|
// Constructor and destructor. No actions.
|
|
|
|
virtual void EvaluateRhsGivenB( const G4double y[],
|
|
const G4double E[3],
|
|
G4double dydx[] ) const = 0;
|
|
// Given the value of the field "B", this function
|
|
// calculates the value of the derivative dydx.
|
|
// This is the _only_ function a subclass must define.
|
|
// The other two functions use Rhs_givenB.
|
|
|
|
inline G4double FCof() const;
|
|
void RightHandSide( const G4double y[], G4double dydx[] ) const;
|
|
virtual void SetChargeMomentumMass( G4double particleCharge, // in e+ units
|
|
G4double MomentumXc,
|
|
G4double mass);
|
|
|
|
private:
|
|
|
|
G4double fCof_val;
|
|
|
|
static const G4double fUnitConstant; // Set in G4El_EqRhs.cc
|
|
// to 0.299792458
|
|
// Coefficient in the Lorentz motion equation (Lorentz force), if the
|
|
// electric field B is in Tesla, the particle charge in units of the
|
|
// elementary (positron?) charge, the momentum P in MeV/c, and the
|
|
// space coordinates and path along the trajectory in mm .
|
|
};
|
|
|
|
inline
|
|
G4double G4El_EqRhs::FCof() const
|
|
{
|
|
return fCof_val;
|
|
}
|
|
|
|
|
|
#endif /* G4_EL_EQRHS_DEF */
|