A design of an electron gun employable in THz vacuum tubes

What is it about?

This paper presents the design of an electron gun employable in THz vacuum tubes. A Multiphysics (MP) approach has been used in the electron gun design in order to study the effect of the multiple influencing factors such as mechanical stress or thermal expansion togheter with charged particle in electrostatic and magnetostatic fields.

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Why is it important?

The THz range is a region of the electromagnetic spectrum that has remained until now mostly unexploited mainly due to the power limits of the available sources. In this context, vacuum tubes, such as for example traveling wave tubes (TWT) or klystrons, represents the only way to obtain high power sources with compact dimensions.