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20 - System Integration

Published online by Cambridge University Press:  27 April 2018

Richard G. Carter
Richard G. Carter
Affiliation:
Lancaster University
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Summary

Magnetic fields having well-defined spatial distributions are essential to the operation of many types of vacuum tube. This chapter summarises the theory of magnetism and the properties of soft and hard ferro-magnetic materials. The use of magnetic circuit theory for the design of electro-magnets and permanent magnets is described. The magnets used in vacuum tubes can be divided into coil dominated magnets in which no iron is used to control the flux paths and iron dominated magnets in which the greater part of the flux passes through iron. The theory of coil-dominated magnets employing arrays of coils or solenoids is described with an emphasis on the production of a uniform magnetic field within a volume of space. In iron dominated magnets the shape of the pole-pieces has an important influence on the distribution of the flux in the intervening air gap. The design of iron-dominated magnets for magnetrons, CFAs and linear-beam tubes is discussed with a detailed discussion of the design of periodic permanent magnet (PPM) systems. The results are compared with the results of simulation using finite element methods.
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Chapter
Information
Microwave and RF Vacuum Electronic Power Sources , pp. 765 - 788
Publisher: Cambridge University Press
Print publication year: 2018

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  • System Integration
  • Richard G. Carter, Lancaster University
  • Book: Microwave and RF Vacuum Electronic Power Sources
  • Online publication: 27 April 2018
  • Chapter DOI: https://doi.org/10.1017/9780511979231.020
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  • System Integration
  • Richard G. Carter, Lancaster University
  • Book: Microwave and RF Vacuum Electronic Power Sources
  • Online publication: 27 April 2018
  • Chapter DOI: https://doi.org/10.1017/9780511979231.020
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • System Integration
  • Richard G. Carter, Lancaster University
  • Book: Microwave and RF Vacuum Electronic Power Sources
  • Online publication: 27 April 2018
  • Chapter DOI: https://doi.org/10.1017/9780511979231.020
Available formats
×