High-power terahertz emission from a plasma penetrated by counterstreaming different-size electron beams

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High-power terahertz emission from a plasma penetrated by counterstreaming different-size electron beams. / Annenkov, V. V.; Berendeev, E. A.; Timofeev, I. V. et al.

In: Physics of Plasmas, Vol. 25, No. 11, 113110, 01.11.2018.

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

BibTeX

@article{5256dbd66fed44f68bf05779fff68a1d,

title = "High-power terahertz emission from a plasma penetrated by counterstreaming different-size electron beams",

abstract = "It is found that multi-cycle pulses of high-power coherent terahertz radiation can be efficiently generated in a plasma by counterstreaming long-pulse electron beams driving potential plasma waves via the two-stream instability. Instead of the well-known three-wave interaction processes between oblique beam-driven modes, we propose to generate electromagnetic radiation near the doubled plasma frequency due to the novel and much more efficient mechanism based on the head-on collision of longitudinal plasma waves with mismatching potential profiles. It is shown that this radiation mechanism can be implemented experimentally either by the collision of low-density electron beams with different transverse sizes or by the counter injection of denser equal-size beams unstable against filamentation perturbations. Particle-in-cell simulations for kiloampere electron beams capable of focusing into millimeter-scale sizes demonstrate the possibility to reach the high efficiency of beams-to-THz power conversion (3%-7%), which opens the path to gigawatt-class THz sources with a narrow spectral line.",

keywords = "GENERATION, RADIATION",

author = "Annenkov, {V. V.} and Berendeev, {E. A.} and Timofeev, {I. V.} and Volchok, {E. P.}",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = nov,

day = "1",

doi = "10.1063/1.5048245",

language = "English",

volume = "25",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "11",

}

RIS

TY - JOUR

T1 - High-power terahertz emission from a plasma penetrated by counterstreaming different-size electron beams

AU - Annenkov, V. V.

AU - Berendeev, E. A.

AU - Timofeev, I. V.

AU - Volchok, E. P.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - It is found that multi-cycle pulses of high-power coherent terahertz radiation can be efficiently generated in a plasma by counterstreaming long-pulse electron beams driving potential plasma waves via the two-stream instability. Instead of the well-known three-wave interaction processes between oblique beam-driven modes, we propose to generate electromagnetic radiation near the doubled plasma frequency due to the novel and much more efficient mechanism based on the head-on collision of longitudinal plasma waves with mismatching potential profiles. It is shown that this radiation mechanism can be implemented experimentally either by the collision of low-density electron beams with different transverse sizes or by the counter injection of denser equal-size beams unstable against filamentation perturbations. Particle-in-cell simulations for kiloampere electron beams capable of focusing into millimeter-scale sizes demonstrate the possibility to reach the high efficiency of beams-to-THz power conversion (3%-7%), which opens the path to gigawatt-class THz sources with a narrow spectral line.

AB - It is found that multi-cycle pulses of high-power coherent terahertz radiation can be efficiently generated in a plasma by counterstreaming long-pulse electron beams driving potential plasma waves via the two-stream instability. Instead of the well-known three-wave interaction processes between oblique beam-driven modes, we propose to generate electromagnetic radiation near the doubled plasma frequency due to the novel and much more efficient mechanism based on the head-on collision of longitudinal plasma waves with mismatching potential profiles. It is shown that this radiation mechanism can be implemented experimentally either by the collision of low-density electron beams with different transverse sizes or by the counter injection of denser equal-size beams unstable against filamentation perturbations. Particle-in-cell simulations for kiloampere electron beams capable of focusing into millimeter-scale sizes demonstrate the possibility to reach the high efficiency of beams-to-THz power conversion (3%-7%), which opens the path to gigawatt-class THz sources with a narrow spectral line.

KW - GENERATION

KW - RADIATION

UR - http://www.scopus.com/inward/record.url?scp=85056738261&partnerID=8YFLogxK

U2 - 10.1063/1.5048245

DO - 10.1063/1.5048245

M3 - Article

AN - SCOPUS:85056738261

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 11

M1 - 113110

ER -

ID: 17485895