Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses

Naum S. Ginzburg, Adrian W. Cross, Anton A. Golovanov, Alan D. R. Phelps, Ilya V. Romanchenko, Vladislav V. Rostov, Konstantin A. Sharypov, Valery G. Shpak, Sergey A. Shunailov, Marat R. Ul'masculov, Michael I. Yalandin, Irina V. Zotova

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

For relativistic Cherenkov devices, we investigate the process of high-power microwave pulse generation with its phase correlating to the sharp edge of an e-beam current pulse. Our theoretical consideration is referred to quasi-stationary and superradiative (SR) generation regimes when spontaneous emission of the e-beam edge serves as the seed for the development of further coherent oscillations. Phase correlation of the excited microwave pulses with the characteristics of the current pulse front and/or an initial external electromagnetic pulse has been additionally confirmed by particle-in-cell simulations. Pulse-to-pulse stability of the radiation phase within several percents of the oscillation period makes it possible to arrange multichannel schemes producing mutually coherent microwave pulses. In the experiments that have been carried out, the cathodes of independent generators were powered by identical accelerating pulses from strictly synchronized voltage modulators, or by splitting the pulse from a single powerful modulator. For the 2-ns regime with the power of each Ka-band backward-wave oscillator about 100 MW, we demonstrate quadratic growth of the power density in the interference maximum of the directional diagram. In a short pulse SR regime, with the peak power of 600 MW in a single channel, for a four-channel 2-D array, we attained a 16-fold radiation intensity gain.

LanguageEnglish
Pages377-385
Number of pages9
JournalIEEE Transactions on Plasma Science
Volume44
Issue number4
Early online date29 Jan 2016
DOIs
Publication statusE-pub ahead of print - 29 Jan 2016

Fingerprint

microwaves
pulses
radiant flux density
modulators
oscillations
backward waves
electromagnetic pulses
beam currents
spontaneous emission
seeds
generators
cathodes
diagrams
oscillators
interference
electric potential
radiation
cells
simulation

Keywords

  • microwaves
  • Cherenkov radiation
  • coherent summation
  • high power microwaves
  • relativistic electron beams
  • superradiance

Cite this

Ginzburg, Naum S. ; Cross, Adrian W. ; Golovanov, Anton A. ; Phelps, Alan D. R. ; Romanchenko, Ilya V. ; Rostov, Vladislav V. ; Sharypov, Konstantin A. ; Shpak, Valery G. ; Shunailov, Sergey A. ; Ul'masculov, Marat R. ; Yalandin, Michael I. ; Zotova, Irina V. / Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses. In: IEEE Transactions on Plasma Science. 2016 ; Vol. 44, No. 4. pp. 377-385.
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abstract = "For relativistic Cherenkov devices, we investigate the process of high-power microwave pulse generation with its phase correlating to the sharp edge of an e-beam current pulse. Our theoretical consideration is referred to quasi-stationary and superradiative (SR) generation regimes when spontaneous emission of the e-beam edge serves as the seed for the development of further coherent oscillations. Phase correlation of the excited microwave pulses with the characteristics of the current pulse front and/or an initial external electromagnetic pulse has been additionally confirmed by particle-in-cell simulations. Pulse-to-pulse stability of the radiation phase within several percents of the oscillation period makes it possible to arrange multichannel schemes producing mutually coherent microwave pulses. In the experiments that have been carried out, the cathodes of independent generators were powered by identical accelerating pulses from strictly synchronized voltage modulators, or by splitting the pulse from a single powerful modulator. For the 2-ns regime with the power of each Ka-band backward-wave oscillator about 100 MW, we demonstrate quadratic growth of the power density in the interference maximum of the directional diagram. In a short pulse SR regime, with the peak power of 600 MW in a single channel, for a four-channel 2-D array, we attained a 16-fold radiation intensity gain.",
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Ginzburg, NS, Cross, AW, Golovanov, AA, Phelps, ADR, Romanchenko, IV, Rostov, VV, Sharypov, KA, Shpak, VG, Shunailov, SA, Ul'masculov, MR, Yalandin, MI & Zotova, IV 2016, 'Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses' IEEE Transactions on Plasma Science, vol. 44, no. 4, pp. 377-385. https://doi.org/10.1109/TPS.2016.2517670

Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses. / Ginzburg, Naum S.; Cross, Adrian W.; Golovanov, Anton A.; Phelps, Alan D. R.; Romanchenko, Ilya V.; Rostov, Vladislav V.; Sharypov, Konstantin A.; Shpak, Valery G.; Shunailov, Sergey A.; Ul'masculov, Marat R.; Yalandin, Michael I.; Zotova, Irina V.

In: IEEE Transactions on Plasma Science, Vol. 44, No. 4, 29.01.2016, p. 377-385.

Research output: Contribution to journalArticle

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T1 - Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses

AU - Ginzburg, Naum S.

AU - Cross, Adrian W.

AU - Golovanov, Anton A.

AU - Phelps, Alan D. R.

AU - Romanchenko, Ilya V.

AU - Rostov, Vladislav V.

AU - Sharypov, Konstantin A.

AU - Shpak, Valery G.

AU - Shunailov, Sergey A.

AU - Ul'masculov, Marat R.

AU - Yalandin, Michael I.

AU - Zotova, Irina V.

N1 - © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2016/1/29

Y1 - 2016/1/29

N2 - For relativistic Cherenkov devices, we investigate the process of high-power microwave pulse generation with its phase correlating to the sharp edge of an e-beam current pulse. Our theoretical consideration is referred to quasi-stationary and superradiative (SR) generation regimes when spontaneous emission of the e-beam edge serves as the seed for the development of further coherent oscillations. Phase correlation of the excited microwave pulses with the characteristics of the current pulse front and/or an initial external electromagnetic pulse has been additionally confirmed by particle-in-cell simulations. Pulse-to-pulse stability of the radiation phase within several percents of the oscillation period makes it possible to arrange multichannel schemes producing mutually coherent microwave pulses. In the experiments that have been carried out, the cathodes of independent generators were powered by identical accelerating pulses from strictly synchronized voltage modulators, or by splitting the pulse from a single powerful modulator. For the 2-ns regime with the power of each Ka-band backward-wave oscillator about 100 MW, we demonstrate quadratic growth of the power density in the interference maximum of the directional diagram. In a short pulse SR regime, with the peak power of 600 MW in a single channel, for a four-channel 2-D array, we attained a 16-fold radiation intensity gain.

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KW - microwaves

KW - Cherenkov radiation

KW - coherent summation

KW - high power microwaves

KW - relativistic electron beams

KW - superradiance

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