Efficient generation of -radiation in a beam-driven thick plasma with oblique density modulation

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Efficient generation of -radiation in a beam-driven thick plasma with oblique density modulation. / Glinskiy, V. V.; Timofeev, I. V.; Annenkov, V. V.

In: Journal of Plasma Physics, Vol. 88, No. 3, 905880309, 09.06.2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{624106cf22144eb4a1b04aefbb943be0,

title = "Efficient generation of -radiation in a beam-driven thick plasma with oblique density modulation",

abstract = "Recent experiments on the collective interaction of gigawatt electron beams with plasma at the GOL-PET facility have shown that the power of the electromagnetic radiation at the plasma frequency increases tens of times if the starting plasma is created with quasiperiodic radial density gradients. One of the mechanisms capable of providing highly efficient conversion of an unstable beam-driven wave into an electromagnetic one in the presence of periodic density perturbations is the mechanism of plasma antenna. However, earlier this mechanism was considered only for strictly longitudinal modulation of the plasma density, when its efficiency dropped drastically if the transverse size of the plasma significantly exceeded the radiation wavelength. In this work, based on both analytical theory and particle-in-cell modelling, we will show that the presence of oblique modulation of the plasma density makes the antenna mechanism effective even in a thick plasma, if the long-wavelength satellite of the most unstable beam-driven wave falls into resonance with natural plasma oscillations. ",

keywords = "plasma instabilities, plasma simulation, plasma waves",

author = "Glinskiy, {V. V.} and Timofeev, {I. V.} and Annenkov, {V. V.}",

note = "Funding Information: The work is supported by the Foundation for the Advancement of Theoretical Physics and Mathematics {\textquoteleft}BASIS{\textquoteright}. Publisher Copyright: Copyright {\textcopyright} The Author(s), 2022. Published by Cambridge University Press.",

year = "2022",

month = jun,

day = "9",

doi = "10.1017/S002237782200040X",

language = "English",

volume = "88",

journal = "Journal of Plasma Physics",

issn = "0022-3778",

publisher = "Cambridge University Press",

number = "3",

}

RIS

TY - JOUR

T1 - Efficient generation of -radiation in a beam-driven thick plasma with oblique density modulation

AU - Glinskiy, V. V.

AU - Timofeev, I. V.

AU - Annenkov, V. V.

N1 - Funding Information: The work is supported by the Foundation for the Advancement of Theoretical Physics and Mathematics ‘BASIS’. Publisher Copyright: Copyright © The Author(s), 2022. Published by Cambridge University Press.

PY - 2022/6/9

Y1 - 2022/6/9

N2 - Recent experiments on the collective interaction of gigawatt electron beams with plasma at the GOL-PET facility have shown that the power of the electromagnetic radiation at the plasma frequency increases tens of times if the starting plasma is created with quasiperiodic radial density gradients. One of the mechanisms capable of providing highly efficient conversion of an unstable beam-driven wave into an electromagnetic one in the presence of periodic density perturbations is the mechanism of plasma antenna. However, earlier this mechanism was considered only for strictly longitudinal modulation of the plasma density, when its efficiency dropped drastically if the transverse size of the plasma significantly exceeded the radiation wavelength. In this work, based on both analytical theory and particle-in-cell modelling, we will show that the presence of oblique modulation of the plasma density makes the antenna mechanism effective even in a thick plasma, if the long-wavelength satellite of the most unstable beam-driven wave falls into resonance with natural plasma oscillations.

AB - Recent experiments on the collective interaction of gigawatt electron beams with plasma at the GOL-PET facility have shown that the power of the electromagnetic radiation at the plasma frequency increases tens of times if the starting plasma is created with quasiperiodic radial density gradients. One of the mechanisms capable of providing highly efficient conversion of an unstable beam-driven wave into an electromagnetic one in the presence of periodic density perturbations is the mechanism of plasma antenna. However, earlier this mechanism was considered only for strictly longitudinal modulation of the plasma density, when its efficiency dropped drastically if the transverse size of the plasma significantly exceeded the radiation wavelength. In this work, based on both analytical theory and particle-in-cell modelling, we will show that the presence of oblique modulation of the plasma density makes the antenna mechanism effective even in a thick plasma, if the long-wavelength satellite of the most unstable beam-driven wave falls into resonance with natural plasma oscillations.

KW - plasma instabilities

KW - plasma simulation

KW - plasma waves

UR - http://www.scopus.com/inward/record.url?scp=85132033167&partnerID=8YFLogxK

U2 - 10.1017/S002237782200040X

DO - 10.1017/S002237782200040X

M3 - Article

AN - SCOPUS:85132033167

VL - 88

JO - Journal of Plasma Physics

JF - Journal of Plasma Physics

SN - 0022-3778

IS - 3

M1 - 905880309

ER -

ID: 36433713