Experimental study of transparent TWT with the modulation of an electron beam near the cathode

A. V. Starodubov, Yu A. Kalinin

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

In this work we consider the experimental studies that were conducted using a transparent (without microwave absorber) travelling wave tube (TWT) with helical slow-wave structure. The difference between used in experiment TWT and the standard one is that the input signal is supplied to the modulating grid positioned near the cathode. The used in our experiments transparent TWT worked in crestatron regime. The experimental results show that the scheme with feeding the input microwave signal to the modulating grid, located near the cathode has a significant advantage, which is the high value of the gain, and efficiency of the TWT amplifier and the expansion of operating frequency band. It has been established that the maximum value of electronic efficiency for the version in which the input signal is fed to the modulating grid positioned near the cathode is 56% compared to 43% for option in which the input signal is fed to a retarding system Technical efficiency is 73 ÷ 75%. An increase of the bandwidth to the values Δf/f ∼ 1.5 ÷ 1.7 was determined.

Original languageEnglish
Title of host publicationICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479927111
DOIs
Publication statusPublished - 16 Jan 2015
Externally publishedYes
Event41st IEEE International Conference on Plasma Science, ICOPS 2014 and the 20th IEEE International Conference on High-Power Particle Beams, BEAMS 2014 - Washington, United States
Duration: 25 May 201429 May 2014

Publication series

NameICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams

Conference

Conference41st IEEE International Conference on Plasma Science, ICOPS 2014 and the 20th IEEE International Conference on High-Power Particle Beams, BEAMS 2014
CountryUnited States
CityWashington
Period25.05.201429.05.2014

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