Moved Tao's code to TaoLEMuSR.

geant4/TaoLEMuSR/include/LEMuSRElFieldMix.hh

@@ -0,0 +1,100 @@
+//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
+//             LOW ENERGY MUON SPIN RELAXATION, ROTATION, RADIATION 
+// 
+//  ID    :LEMuSRElFieldMix.hh , v 1.3
+//  AUTHOR: Taofiq PARAISO
+//  DATE  : 2005-02-14 15:15
+//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
+//
+//  &           &&&&&&&&&&                            &&&&&&&         &&&&&&&&
+//  &           &                                   &&      &&       &       &&
+//  &           &                   &      &       &                &       &&
+//  &           &&&&&&&            &      &         &&&&&&         &&&&&&&&  
+//  &           &                 &      &&                &      &      &&
+//  &           &                &&     &  &     &&      &&      &        &
+//  &&&&&&&&&&  &&&&&&&&&&      &  &&&&&    &&    &&&&&&&       &        &&   
+//                             &
+//                            &
+//                           &
+//                         &  
+//                               Electric Field  MIX
+//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
+
+#ifndef LEMUSRELECTRICFIELDMIX_H
+#define LEMUSRELECTRICFIELDMIX_H 1
+ 
+#include"G4ElectricField.hh"
+#include"G4ElectroMagneticField.hh"
+#include "globals.hh"
+#include "G4ios.hh"
+
+#include <iomanip>
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <cmath>
+#include "CLHEP/Matrix/Vector.h"
+#include "CLHEP/Matrix/Matrix.h"
+
+
+#include "LEMuSRElectricField.hh"
+
+
+/**
+ * In order to build complex electric fields, the following class has been built. 
+ * It allows the superposition of many electric fields recurrently. 
+ *
+ * The main reason for this is that the field manager attached to a given volume do not handle such a 
+ * superposition. In the case of the sample chamber, this is a big problem because we have to handle 
+ * the fields of the ring anode and of the sample cryostat. 
+ *
+ * The electric field in the sample region (gate valve chamber + mcp2 chamber) is then the 
+ * superposition of the following electric fields:
+ * -# left side of the ring anode
+ * -# right side of the ring anode
+ * -# sample cryostat
+ * .
+ * On the same principle was built the class LEMuSRElMagField.
+ */
+class LEMuSRElFieldMix : public G4ElectricField
+{
+public:
+ 
+  //! Contructor for two field map superposition.
+  LEMuSRElFieldMix( LEMuSRElectricField* E1,  LEMuSRElectricField* E2,  G4double field1_val, G4double field2_val);
+
+  //! Constructor for two general fields superposition.
+  LEMuSRElFieldMix( G4ElectricField* E1,  G4ElectricField* E2,  G4double field1_val, G4double field2_val);
+  
+
+  //! Destructor. 
+  ~LEMuSRElFieldMix();
+  
+  //! Method to return the field at position-time point[4].
+  /*!
+   * As an electric field superposition is linear, the GetFieldValue method simply ask each input field
+   * for its value at the given position-time and returns as a field value the weighted sum of the 
+   * two answers.
+   */
+  void GetFieldValue(const G4double point[4], G4double*) const;
+  
+  void Test();
+  
+public:
+  
+  //! Input field 1.
+  G4ElectricField* field1;
+  //! Input field 2.
+  G4ElectricField* field2;
+
+  //! Weight for input field 1.
+  G4double coef1;
+  //! Weight for input field 2.
+  G4double coef2;
+
+  
+};
+
+#endif
+
+