Electron Gun for Gyrotrons

CHAPTER 1

INTRODUCTION

1.1

General introduction

1.2

Introduction to Gyrotron

1.1.1 Applications

1.3

Introduction to Magnetron Injection Gun (MIG)

CHAPTER 2

MOTION OF ELECTRON BEAM IN GYROTRON

2.1

Introduction

2.2

Electron beam Generation

2.2.1 Thermionic Cathodes

2.2.2 Functioning of Thermionic Cathodes

2.2.3 Thermionic Cathode material

2.2.4 Operating mechanism

2.3

Electron beam Propagation

2.4

Electron beam Compression

2.5

Electron beam Interaction

2.6

Electron beam Collection

CHAPTER 3

ELECTRICAL DESIGN OF MIG

3.1

Introduction

3.2

Preliminary design

3.3

Design constraints

3.4

Electrical Design

3.4.1 Geometry creation

3.4.2 Design goals

3.4.3 Electron beam analysis

3.4.4 Output Parameters tuning

3.4.5 Parametric study

3.5

Design of MIGs with different geometrical configurations

3.5.1 Double beam MIG

3.5.2 Tunable MIG

3.5.3 Co-axial MIG

3.5.4 Inverse MIG

Appendix A3.1: Study MIG Design Equations

CHAPTER 4

THERMAL AND HIGH VOLTAGE BREAKDOWN STUDY

4.1

Introduction

4.2

Introduction to Thermal Analysis

4.3

Thermal Analysis of MIG

4.3.1 Cathode heater Temperature realization

4.3.2 Anode Temperature realization

4.3.3 Study of Structural deformation

4.4

Introduction to high voltage Analysis

4.5

high voltage Breakdown

4.6

Electric breakdown in MIG

4.6.1 Electric breakdown in air

4.6.2 Electric breakdown in vacuum

4.6.3 Electric breakdown in insulator

4.7

High voltage breakdown study of MIG

4.8

conclusion

CHAPTER 5

MECHANICAL AND OPERATIONAL DESIGN OF MIG

5.1

Introduction

5.2

Material selection and engineering drawings

5.3

Fabrication of MIG

5.4

Material selection and Engineering design

5.5

Fabrication of MIG

5.6

Vacuum operation

5.7

MIG testing

5.7.1 Cold testing

5.7.2 Hot Testing

CHAPTER 6

MIG DESIGN EXAMPLES

6.1

General Introduction

6.2

MIG design for different applications

6.2.1 Low power MIG design

6.2.2 Double beam MIG design

6.2.3 High power MIG design

6.2.4 Magnetically tunable MIG design

6.2.5 MIG design at THz frequency

6.2.6 Co-axial MIG design

6.2.7 Inverse MIG design

6.3

Conclusion

CHAPTER 7

CONCLUDING REMARKS

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REFERENCES

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