86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//*
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// LOW ENERGY MUON SPIN RELAXATION, ROTATION, RADIATION
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//
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// ID :LEMuSRElMagField.hh , v 1.3
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// AUTHOR: Taofiq PARAISO
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// DATE : 2004-09-17 10:20
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
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//
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// & &&&&&&&&&& &&&&&&& &&&&&&&&
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// & & && && & &&
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// & & & & & & &&
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// & &&&&&&& & & &&&&&& &&&&&&&&
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// & & & && & & &&
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// & & && & & && && & &
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// &&&&&&&&&& &&&&&&&&&& & &&&&& && &&&&&&& & &&
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// &
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// &
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// &
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// &
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// ElectroMagnetic Field
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$//
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#ifndef LEMUSRELECTRICMAGFIELD_H
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#define LEMUSRELECTRICMAGFIELD_H 1
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#include"G4ElectricField.hh"
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#include"G4MagneticField.hh"
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#include"G4ElectroMagneticField.hh"
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#include "globals.hh"
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#include "G4ios.hh"
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#include <iomanip>
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#include <iostream>
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#include <fstream>
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#include <vector>
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#include <cmath>
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#include "CLHEP/Matrix/Vector.h"
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#include "CLHEP/Matrix/Matrix.h"
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#include "LEMuSRElectricField.hh"
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/**
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* In order to build complex electromagnetic fields, the following class has been built.
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* It allows the superposition of an electric field and a magnetic field.
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*
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* The main reason for this is that the field manager attached to a given volume do not handle such a
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* superposition. In the case of the sample chamber, this is a big problem because we have to handle
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* the electric fields of the ring anode and of the sample cryostat as well as the magnetic field over the sample.
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*
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* The electromagnetic field in the sample region (gate valve chamber + mcp2 chamber) is then the
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* superposition of the following fields:
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* -# electric field for left side of the ring anode
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* -# electric field for right side of the ring anode
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* -# electric field for sample cryostat
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* -# magnetic field for sample region
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* .
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* On the same principle was built the class LEMuSRElFieldMix
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*/
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class LEMuSRElMagField : public G4MagneticField
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{
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public:
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LEMuSRElMagField( G4ElectricField* E, G4MagneticField* B, G4double field1_val, G4double field2_val);
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~LEMuSRElMagField();
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void GetFieldValue(const G4double point[4], G4double *Bfield) const;
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void Test();
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G4bool DoesFieldChangeEnergy() const { return true; }// important to state that field changes energy (electric part!!!)
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public:
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G4double coef1, coef2;
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G4ElectricField* field1;
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G4MagneticField* field2;
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};
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#endif
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