Double-gap vircator operation at sub-microsecond pulse duration

A. Shlapakovski, T. Kweller, Y. Hadas, Ya E. Krasik, S. Polevin, I. Kurkan

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

1 Citation (Scopus)


The double-gap S-band vircator operation has been investigated at sub-microsecond duration of the highcurrent electron beam generated in a planar diode. This version of vircator (see Fig. 1), although driven by a highcurrent (≥10 kA) relativistic electron beam, nevertheless allows both relatively efficient microwave generation and also radiation frequency stability, due to the use of a single-mode two-section rectangular RF cavity. The double-gap vircator powered by the accelerator SINUS-7 (1MV, 20kA, 50ns) demonstrated ~1GW peak power of microwave radiation in the S-band at ~25ns pulse length with ~5% efficiency [1]. Earlier experiments with longer driving beam pulses [2] at the voltages close to those of [1] confirmed the constancy of the radiation frequency, as determined by the cavity, during the pulse. However, the microwave pulse was significantly shortened (≤100ns) as compared to the accelerating voltage pulse that was explained by electron and ion emission from the plasma formed on the cavity walls leading to absorption of the microwave energy. In this work, we present the results of the experiments performed at moderate accelerating voltages, ≤550kV, and longer pulse durations, ~500ns.

Original languageEnglish
Title of host publication2009 IEEE International Vacuum Electronics Conference, IVEC 2009
Number of pages2
Publication statusPublished - 2009
Event2009 IEEE International Vacuum Electronics Conference, IVEC 2009 - Rome, Italy
Duration: 28 Apr 200930 Apr 2009


Other2009 IEEE International Vacuum Electronics Conference, IVEC 2009

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Double-gap vircator operation at sub-microsecond pulse duration'. Together they form a unique fingerprint.

Cite this