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geant4/LEMuSR/G4Modified/G4El_EqRhs.hh
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geant4/LEMuSR/G4Modified/G4El_EqRhs.hh
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//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4El_EqRhs.hh,v 1.8 2003/11/05 12:54:13 japost Exp $
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// GEANT4 tag $Name: geant4-06-00-patch-01 $
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//
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//
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// class G4El_EqRhs
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//
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// Class description:
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//
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// The "standard" equation of motion of a particle in a pure electric field.
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// History:
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// - Created. J.Apostolakis, January 13th 1997
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// --------------------------------------------------------------------
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#ifndef G4_EL_EQRHS_DEF
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#define G4_EL_EQRHS_DEF
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#include "G4Types.hh"
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#include "G4EquationOfMotion.hh"
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class G4ElectricField;
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class G4El_EqRhs : public G4EquationOfMotion
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{
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public: // with description
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G4El_EqRhs( G4ElectricField *elField );
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virtual ~G4El_EqRhs();
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// Constructor and destructor. No actions.
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virtual void EvaluateRhsGivenB( const G4double y[],
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const G4double E[3],
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G4double dydx[] ) const = 0;
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// Given the value of the field "B", this function
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// calculates the value of the derivative dydx.
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// This is the _only_ function a subclass must define.
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// The other two functions use Rhs_givenB.
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inline G4double FCof() const;
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void RightHandSide( const G4double y[], G4double dydx[] ) const;
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virtual void SetChargeMomentumMass( G4double particleCharge, // in e+ units
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G4double MomentumXc,
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G4double mass);
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private:
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G4double fCof_val;
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static const G4double fUnitConstant; // Set in G4El_EqRhs.cc
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// to 0.299792458
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// Coefficient in the Lorentz motion equation (Lorentz force), if the
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// electric field B is in Tesla, the particle charge in units of the
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// elementary (positron?) charge, the momentum P in MeV/c, and the
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// space coordinates and path along the trajectory in mm .
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};
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inline
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G4double G4El_EqRhs::FCof() const
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{
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return fCof_val;
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}
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#endif /* G4_EL_EQRHS_DEF */
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