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Product details:
- ISBN 10: 3030472914
- ISBN 13: 9783030472917
- Author: Georg Gaertner
This book gives an overview of modern cathodes and electron emitters for vacuum tubes and vacuum electron devices in general. It covers the latest developments in field emission theory as well as new methods towards improving thermionic and cold cathodes. It addresses thermionic cathodes, such as oxide cathodes, impregnated and scandate cathodes, as well as photocathodes and field emitters – the latter comprising carbon nanotubes, graphene and Spindt-type emitter arrays. Despite the rise and fall of the once dominant types of vacuum tubes, such as radio valves and cathode ray tubes, cathodes are continually being improved upon as new applications with increased demands arise, for example in electron beam lithography, high-power and high-frequency microwave tubes, terahertz imaging and electron sources for accelerators. Written by 17 experts in the field, the book presents the latest developments in cathodes needed for these applications, discussing the state of the art and addressing future trends.
Table of contents:
1. History of Vacuum Electronics and Vacuum Electron Sources and Future Development Trends
2. Review on Impregnated and Reservoir Ba Dispenser Cathodes
3. State of the Art and Future Perspectives of Ba Scandate Dispenser Cathodes
4. Modern Developments in Ba Oxide Cathodes
5. Cathodes of Medical X-Ray Tubes
6. Cathodes for Electron Microscopy and Lithography
7. Photocathodes
8. A Thermal-Field-Photoemission Model and Its Application
9. Renewing the Mainstream Theory of Field and Thermal Electron Emission
10. Carbon-Based Field Emitters: Properties and Applications
11. Explosive Electron Emission of Carbon-Based Cathodes, and Applications
12. Spindt Cathodes and Other Field Emitter Arrays
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