00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // $Id: G4StokesVector.hh 69847 2013-05-16 09:36:18Z gcosmo $ 00027 // 00028 // GEANT4 Class header file 00029 // 00030 // File name: G4StokesVector 00031 // 00032 // Author: Andreas Schaelicke 00033 // 00034 // Creation date: 01.05.2005 00035 // 00036 // Modifications: 00037 // 27-07-06 added some test routines (P.Starovoitov) 00038 // 25-08-06 modified name of test routines (A.Schaelicke) 00039 // 00040 // Class Description: 00041 // 00042 // Provides Stokesvector representation employed in implementation of 00043 // polarized processes. 00044 // 00045 // aim: 00046 // - store three components of a stokesvector 00047 // - distinguish between boson or fermion state (different transformations) 00048 // - provide unique definition of reference frame (cf. G4PolarizationHelper) 00049 // 00050 00051 #ifndef G4StokesVector_h 00052 #define G4StokesVector_h 1 00053 00054 #include "G4ThreeVector.hh" 00055 #include "G4RotationMatrix.hh" 00056 00057 00058 class G4StokesVector: public G4ThreeVector 00059 { 00060 public: 00061 // standard vectors: 00062 static const G4StokesVector ZERO; 00063 static const G4StokesVector P1; 00064 static const G4StokesVector P2; 00065 static const G4StokesVector P3; 00066 static const G4StokesVector M1; 00067 static const G4StokesVector M2; 00068 static const G4StokesVector M3; 00069 public: 00070 G4StokesVector(); 00071 G4StokesVector(const G4ThreeVector & v); 00072 virtual ~G4StokesVector(); 00073 public: 00074 inline G4double p1() const { return x(); } 00075 inline G4double p2() const { return y(); } 00076 inline G4double p3() const { return z(); } 00077 00078 inline G4bool IsZero() const { return *this==ZERO; } 00079 inline G4double Transverse() const { return perp(); } 00080 00081 inline G4ThreeVector PolSqr() const { 00082 return G4ThreeVector(x()*x(),y()*y(),z()*z()); 00083 } 00084 inline G4ThreeVector PolSqrt() const { 00085 return G4ThreeVector(std::sqrt(x()),std::sqrt(y()),std::sqrt(z())); 00086 } 00087 G4ThreeVector PolError(const G4StokesVector & sum2, long n); 00088 00089 // Ratio of 3-vectors. 00090 G4ThreeVector PolDiv( const G4StokesVector & ); 00091 00092 inline void SetPhoton() { isPhoton=true; } 00093 00094 void RotateAz(G4ThreeVector nInteractionFrame, 00095 G4ThreeVector particleDirection); 00096 void InvRotateAz(G4ThreeVector nInteractionFrame, 00097 G4ThreeVector particleDirection); 00098 void RotateAz(G4double cosphi, G4double sinphi); 00099 G4double GetBeta(); 00100 00101 void DiceUniform(); 00102 void DiceP1(); 00103 void DiceP2(); 00104 void DiceP3(); 00105 00106 void FlipP3(); 00107 private: 00108 G4bool isPhoton; 00109 }; 00110 00111 00112 #endif