include/Geant4/G4QuadrupoleMagField.hh

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0025 //
0026 // G4QuadrupoleMagField
0027 //
0028 // Class description:
0029 //
0030 // Class for creation of quadrupole magnetic field
0031 //   fGradient - is the gradient value for quadrupole magnetic lense.
0032 // Then the magnetic field components are:
0033 //   Bx = B[0] = fGradient*X ,
0034 //   By = B[1] = fGradient*Y ,
0035 //   Bz = B[2] = 0 .
0036 // Here X,Y,Z are the coordinates of a space point of interest.
0037
0038 // 03.02.1997, V.Grichine - Created
0039 // 11.05.2012, B.Riese  - Allow displaced origin and rotation
0040 // -------------------------------------------------------------------
0041 #ifndef G4QUADRUPOLEMAGFIELD_HH
0042 #define G4QUADRUPOLEMAGFIELD_HH
0043
0044 #include "G4MagneticField.hh"
0045 #include "G4ThreeVector.hh"
0046 #include "G4RotationMatrix.hh"
0047
0048 class G4QuadrupoleMagField : public G4MagneticField
0049 {
0050   public:
0051
0052     G4QuadrupoleMagField(G4double pGradient);
0053     G4QuadrupoleMagField(      G4double pGradient,
0054                          const G4ThreeVector& pOrigin,
0055                                G4RotationMatrix* pMatrix);
0056    ~G4QuadrupoleMagField() override;
0057
0058     void GetFieldValue(const G4double yTrack[],
0059                              G4double B[]     ) const override;
0060     G4Field* Clone() const override;
0061
0062   private:
0063
0064     G4double          fGradient = 0.0;
0065     G4ThreeVector     fOrigin = G4ThreeVector(0.0, 0.0, 0.0);
0066     G4RotationMatrix* fpMatrix = nullptr;
0067 };
0068
0069 #endif