BDSIntegratorDipoleQuadrupole.hh

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2022.
 
This file is part of BDSIM.
 
BDSIM is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published 
by the Free Software Foundation version 3 of the License.
 
BDSIM is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with BDSIM.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef BDSINTEGRATORDIPOLEQUADRUPOLE_H
#define BDSINTEGRATORDIPOLEQUADRUPOLE_H
 
#include "BDSIntegratorMag.hh"
#include "BDSMagUsualEqRhs.hh"
 
#include "globals.hh"
 
class BDSIntegratorDipoleRodrigues2;
class BDSMagnetStrength;
class BDSParticleDefinition;
class BDSStep;
class G4Mag_EqRhs;
 
class BDSIntegratorDipoleQuadrupole: public BDSIntegratorMag
{
public:
  BDSIntegratorDipoleQuadrupole(BDSMagnetStrength const* strength,
                                G4double                 brhoIn,
                                G4Mag_EqRhs*             eqOfMIn,
                                G4double minimumRadiusOfCurvatureIn,
                                const BDSParticleDefinition* designParticle,
                                const G4double&     tiltIn);
  
  virtual ~BDSIntegratorDipoleQuadrupole();
 
  BDSIntegratorDipoleQuadrupole& operator=(const BDSIntegratorDipoleQuadrupole&) = delete;
  BDSIntegratorDipoleQuadrupole(BDSIntegratorDipoleQuadrupole&) = delete;
 
  virtual void Stepper(const G4double y[6],
                       const G4double dydx[6],
                       const G4double h,
                       G4double       yOut[6],
                       G4double       yErr[6]);
 
protected:
 
  void OneStep(const G4ThreeVector& posIn,
               const G4ThreeVector& momIn,
               const G4ThreeVector& momUIn, // assumed unit momentum of momIn
               const G4double&      h,
               const G4double&      fcof,
               G4ThreeVector&       posOut,
               G4ThreeVector&       momOut,
               const G4double       rho,
               const G4double       beta,
               const G4double       deltaEnergy) const;
 
 
 
private:
  BDSIntegratorDipoleQuadrupole() = delete;
  
  const G4double    nominalBRho;  
  BDSMagUsualEqRhs* eq;    
  const G4double    bPrime;
  const G4double    nominalBeta;    
  G4double          nominalRho;     
  const G4double    nominalField;   
  G4double          fieldRatio;     
  const G4double    nominalEnergy;  
  const G4double    nominalMass;    
  const G4double    nominalCharge;  
  G4ThreeVector     unitField;      
  const G4double    fieldArcLength; 
  const G4double    nominalAngle;   
  G4double          angleForCL;     
  G4double          tilt;           
  const G4double    scaling;        
  G4bool            isScaled;       
 
  BDSIntegratorDipoleRodrigues2* dipole;
};
 
#endif