Gabriele Cosmo
97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4QuadrupoleMagField
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//
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// Class description:
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//
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// Class for creation of quadrupole magnetic field
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// fGradient - is the gradient value for quadrupole magnetic lense.
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// Then the magnetic field components are:
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// Bx = B[0] = fGradient*X ,
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// By = B[1] = fGradient*Y ,
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// Bz = B[2] = 0 .
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// Here X,Y,Z are the coordinates of a space point of interest.
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// Author: Vladimir Grichine (CERN), 03.02.1997 - Created
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// -------------------------------------------------------------------
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#ifndef G4QUADRUPOLEMAGFIELD_HH
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#define G4QUADRUPOLEMAGFIELD_HH
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#include "G4MagneticField.hh"
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#include "G4ThreeVector.hh"
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#include "G4RotationMatrix.hh"
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/**
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* @brief G4QuadrupoleMagField allows for the creation of quadrupole magnetic
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* field, given the gradient value for quadrupole magnetic lense.
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*/
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class G4QuadrupoleMagField : public G4MagneticField
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{
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public:
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/**
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* Constructor for G4QuadrupoleMagField.
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* @param[in] pGradient Field gradient value.
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*/
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G4QuadrupoleMagField(G4double pGradient);
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/**
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* Constructor for G4QuadrupoleMagField.
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* @param[in] pGradient Field gradient value.
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* @param[in] pOrigin Origin position.
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* @param[in] pMatrix Rotation matrix.
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*/
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G4QuadrupoleMagField(G4double pGradient,
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const G4ThreeVector& pOrigin,
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G4RotationMatrix* pMatrix);
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/**
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* Default Destructor.
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*/
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~G4QuadrupoleMagField() override = default;
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/**
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* Returns the field value on the given position 'yTrack'.
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* @param[in] yTrack Time position array.
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* @param[out] B The returned field array.
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*/
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void GetFieldValue(const G4double yTrack[], G4double B[]) const override;
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/**
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* Returns a pointer to a new allocated clone of this object.
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*/
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G4Field* Clone() const override;
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private:
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G4double fGradient = 0.0;
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G4ThreeVector fOrigin = G4ThreeVector(0.0, 0.0, 0.0);
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G4RotationMatrix* fpMatrix = nullptr;
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};
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#endif
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