Generation of electromagnetic fields of extremely high intensity by coherent summation of Cherenkov superradiance pulses

N.S. Ginzburg, A. W. Cross, A. A. Golovanov, G. A. Mesyats, M. S. Pedos, A. D. R. Phelps, I. V. Romanchenko, V. V. Rostov, S. N. Rukin, K. A. Sharypov, V. G. Shpak, S. A. Shunailov, M. R. Ulmaskulov, M. I. Yalandin, I. V. Zotova

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Abstract

We demonstrate both theoretically and experimentally the possibility of correlating the phase of a Cherenkov superradiance (SR) pulse to the sharp edge of a current pulse, when spontaneous emission of the electron bunch edge serves as the seed for SR processes. By division of the driving voltage pulse across several parallel channels equipped with independent cathodes we can synchronize several SR sources to arrange a two-dimensional array. In the experiments carried out, coherent summation of radiation from four independent 8-mm wavelength band SR generators with peak power 600 MW results in the interference maximum of the directional diagram with an intensity that is equivalent to radiation from a single source with a power of 10 GW.

Original languageEnglish
Article number114802
Number of pages12
JournalPhysical Review Letters
Volume115
Issue number11
DOIs
Publication statusPublished - 11 Sep 2015

Keywords

  • Cherenkov superradiance (SR) pulse
  • coherent summation
  • interference maximum
  • electromagnetic field

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