Cathode constructive features influence on radiation characteristics in triodes with virtual cathode

T. V. Koval, G. V. Melnikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The increase in the efficiency and power of electromagnetic wave radiation in triodes with a virtual cathode is connected both with the level of interaction between the electron flow and the electromagnetic field of a resonant system and with the number of electrons in the interaction region. That is why, when constructing a generator, an essential point is choosing a cathode. The cathodes used in the experiments differ in their construction features (flat, needle, etc.), emissive ability and provide varied profiles and beam quality. These facts, in turn, influence generator efficiency. This work shows theoretical research of cathode construction features for electron movement, beam uniformity, frequency characteristics and radiation level. In a diode, power flow density of the electron beam depends on the effective area of cathode emission. It is shown that, unlike a diode, in a triode with a virtual cathode, the number of electrons in the interaction region may not depend on the emissive ability of a cathode. It occurs when the space-charge accumulation regime is realized. The accumulation time depends on the anode transparency and on the effective area of cathode emission.

Original languageEnglish
Title of host publication5th Korea-Russia International Symposium on Science and Technology - Proceedings: KORUS 2001
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages341-344
Number of pages4
Volume1
ISBN (Print)0780370082, 9780780370081
DOIs
Publication statusPublished - 2001
Event5th Korea-Russia International Symposium on Science and Technology, KORUS 2001 - Tomsk, Russian Federation
Duration: 26 Jun 20013 Jul 2001

Other

Other5th Korea-Russia International Symposium on Science and Technology, KORUS 2001
CountryRussian Federation
CityTomsk
Period26.6.013.7.01

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Keywords

  • cathode
  • emission
  • generation
  • radiation
  • virtual cathode

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Computer Networks and Communications
  • Biotechnology
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Koval, T. V., & Melnikov, G. V. (2001). Cathode constructive features influence on radiation characteristics in triodes with virtual cathode. In 5th Korea-Russia International Symposium on Science and Technology - Proceedings: KORUS 2001 (Vol. 1, pp. 341-344). [975145] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/KORUS.2001.975145