S-band coaxial vircator with electron beam premodulation based on compact linear transformer driver

Boris M. Kovalchuk, Sergey D. Polevin, Ruslan V. Tsygankov, Andrey A. Zherlitsyn

    Research output: Contribution to journalArticle

    24 Citations (Scopus)

    Abstract

    A two-section coaxial vircator with radial electron beam injection and electrodynamic feedback was developed. The use of electron beam premodulation in the vircator allows an increase in efficiency and ensures single-mode oscillation. The vircator operates with no external magnetic field, features a comparatively low operating impedance of the vacuum diode (10-15 Ω), and makes feasible wide-band frequency tuning through varying the resonator parameters. The vircator was simulated using the PIC-code KARAT. It is shown that, in a wide range of electron beam power (10-25 GW), the oscillation efficiency is 12%-15% and the frequency tuning bandwidth is 15%. In the experiments on a compact linear transformer driver at a cathode voltage of 300 kV, diode current of 20 kA, and driving pulse duration of 250 ns, the single {H11 mode oscillation at 2.2 GHz with a 300-MW microwave peak power and 130-ns pulse duration at half the power level was realized.

    Original languageEnglish
    Article number5551229
    Pages (from-to)2819-2824
    Number of pages6
    JournalIEEE Transactions on Plasma Science
    Volume38
    Issue number10 PART 2
    DOIs
    Publication statusPublished - Oct 2010

    Keywords

    • Beams
    • electromagnetic radiation
    • microwave generation
    • microwave oscillators

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Nuclear and High Energy Physics

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  • Cite this

    Kovalchuk, B. M., Polevin, S. D., Tsygankov, R. V., & Zherlitsyn, A. A. (2010). S-band coaxial vircator with electron beam premodulation based on compact linear transformer driver. IEEE Transactions on Plasma Science, 38(10 PART 2), 2819-2824. [5551229]. https://doi.org/10.1109/TPS.2010.2060367