This book highlights the emission, transmission, and launching of an electron beam. It presents an overview and recent advances in order to enhance knowledge in the field of gyrotron in general and electron gun in particular. The book is presented in seven chapters starting with the introduction and ending with future possible directions in the field of electron beams and gyrotrons.
Author(s): Udaybir Singh, A. K. Sinha
Series: SpringerBriefs in Applied Sciences and Technology
Publisher: Springer
Year: 2022
Language: English
Pages: 145
City: Singapore
Preface
Acknowledgments
Contents
Symbols
1 Introduction
1.1 Introduction to Vacuum Devices
1.1.1 Historical Background
1.1.2 Classification
1.2 Introduction to Gyrotron
1.2.1 Historical Overview
1.2.2 Present Scenario
1.2.3 Functioning
1.2.4 Classification
1.2.5 Applications
1.3 Introduction to Gyrotron Electron Gun
1.3.1 Classification
References
2 Electron Beam Motion in a Gyrotron
2.1 Introduction
2.2 Electron Beam Emission
2.2.1 Thermionic Emission
2.2.2 Secondary Emission
2.2.3 Electron Field Emission
2.2.4 Operating Mechanism of Thermionic Emitters
2.2.5 Types of Thermionic Emitters
2.3 Electron Beam Propagation
2.4 Electron Beam Guidance
2.5 Electron Beam Compression
2.6 Electron Beam Interaction
2.7 Spent Electron Beam Collection
References
3 Preliminary Design of Gyrotron Electron Gun
3.1 Introduction
3.2 Initial Design Calculations
3.2.1 Beam Parameters at Interaction Region
3.2.2 Emitter Parameters
3.2.3 Modulating Anode Parameters
3.3 Design Constraints
3.4 Cathode Range Estimation
Appendix
References
4 Electron Beam Analysis of a Gyrotron Electron Gun
4.1 Introduction
4.2 Electron Beam Analysis
4.2.1 Beam Quality Parameters
4.3 Sensitivity Analysis
4.4 MIG Designs Having Different Geometrical Configurations
References
5 High-Voltage Breakdown Study: Possibilities and Precautions
5.1 Introduction
5.2 Possibilities of Electric Breakdown in a MIG
5.2.1 Electric Breakdown in Air
5.2.2 Electric Breakdown in Vacuum
5.2.3 Electric Breakdown in an Insulator
5.3 Precautions for Electric Breakdown
5.3.1 Precautions During Design
5.3.2 Precautions During Fabrication and Assembling
References
6 Mechanical and Operational Design of a Gyrotron Electron Gun
6.1 Introduction
6.2 Material Selection
6.2.1 Cathode Assembly
6.2.2 The Anodes
6.2.3 The Insulators
6.2.4 Beam Tunnel
6.2.5 Brazing Material
6.3 Fabrication of the MIG
6.4 Vacuum Processing
6.5 Operational Design
6.5.1 Cold Testing of the MIG
6.5.2 Hot Testing of the MIG
References
7 Design Examples
7.1 Introduction
7.2 The MIG Design for 42 GHz, 200 kW Gyrotron
7.3 The MIG Design for a 170-GHz Gyrotron
7.4 The MIG Design for THz Gyrotron
7.5 MIG Design for Double-Beam Gyrotron
7.6 MIG Design for Tunable Frequency Gyrotron
7.7 MIG Design for Co-axial Cavity Gyrotron
References
8 Concluding Remarks
