Well-directed flux of megawatt sub-mm radiation generated by a relativistic electron beam in a magnetized plasma with strong density gradients

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Well-directed flux of megawatt sub-mm radiation generated by a relativistic electron beam in a magnetized plasma with strong density gradients. / Arzhannikov, A. V.; Ivanov, I. A.; Kasatov, A. A. et al.

In: Plasma Physics and Controlled Fusion, Vol. 62, No. 4, 045002, 19.02.2020.

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

BibTeX

@article{00c323e715fc42a89920f4f02e1bbabd,

title = "Well-directed flux of megawatt sub-mm radiation generated by a relativistic electron beam in a magnetized plasma with strong density gradients",

abstract = "The power of electromagnetic emission near the plasma frequency during collective electron beam-plasma interaction is found to be significantly increased in a plasma with preformed large-amplitude density perturbations. Laboratory experiments at the GOL-PET facility show that injection of a kiloampere relativistic electron beam into a magnetized plasma with strong radial density gradients is accompanied with an order of magnitude more intense generation of sub-millimeter waves than in the case of smooth density profile. As a possible mechanism for the enhanced generation of the longitudinal radiation flux observed in these experiments, we discuss the direct beam pumping of longitudinally propagating electromagnetic plasma modes due to their coupling with the Doppler shifted beam branch in the presence of oblique modulation of plasma density.",

keywords = "Beam-plasma interaction, Electromagnetic emission, Generation of terahertz radiation, SYSTEM, LASER, beam-plasma interaction, electromagnetic emission, PULSES, SUBTERAHERTZ RADIATION, WAVES, SPECTROSCOPY, 2-STREAM INSTABILITY, generation of terahertz radiation, TURBULENCE, EMISSION, OSCILLATIONS",

author = "Arzhannikov, {A. V.} and Ivanov, {I. A.} and Kasatov, {A. A.} and Kuznetsov, {S. A.} and Makarov, {M. A.} and Mekler, {K. I.} and Polosatkin, {S. V.} and Popov, {S. S.} and Rovenskikh, {A. F.} and Samtsov, {D. A.} and Sinitsky, {S. L.} and Stepanov, {V. D.} and Annenkov, {V. V.} and Timofeev, {I. V.}",

year = "2020",

month = feb,

day = "19",

doi = "10.1088/1361-6587/ab72e3",

language = "English",

volume = "62",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing Ltd.",

number = "4",

}

RIS

TY - JOUR

T1 - Well-directed flux of megawatt sub-mm radiation generated by a relativistic electron beam in a magnetized plasma with strong density gradients

AU - Arzhannikov, A. V.

AU - Ivanov, I. A.

AU - Kasatov, A. A.

AU - Kuznetsov, S. A.

AU - Makarov, M. A.

AU - Mekler, K. I.

AU - Polosatkin, S. V.

AU - Popov, S. S.

AU - Rovenskikh, A. F.

AU - Samtsov, D. A.

AU - Sinitsky, S. L.

AU - Stepanov, V. D.

AU - Annenkov, V. V.

AU - Timofeev, I. V.

PY - 2020/2/19

Y1 - 2020/2/19

N2 - The power of electromagnetic emission near the plasma frequency during collective electron beam-plasma interaction is found to be significantly increased in a plasma with preformed large-amplitude density perturbations. Laboratory experiments at the GOL-PET facility show that injection of a kiloampere relativistic electron beam into a magnetized plasma with strong radial density gradients is accompanied with an order of magnitude more intense generation of sub-millimeter waves than in the case of smooth density profile. As a possible mechanism for the enhanced generation of the longitudinal radiation flux observed in these experiments, we discuss the direct beam pumping of longitudinally propagating electromagnetic plasma modes due to their coupling with the Doppler shifted beam branch in the presence of oblique modulation of plasma density.

AB - The power of electromagnetic emission near the plasma frequency during collective electron beam-plasma interaction is found to be significantly increased in a plasma with preformed large-amplitude density perturbations. Laboratory experiments at the GOL-PET facility show that injection of a kiloampere relativistic electron beam into a magnetized plasma with strong radial density gradients is accompanied with an order of magnitude more intense generation of sub-millimeter waves than in the case of smooth density profile. As a possible mechanism for the enhanced generation of the longitudinal radiation flux observed in these experiments, we discuss the direct beam pumping of longitudinally propagating electromagnetic plasma modes due to their coupling with the Doppler shifted beam branch in the presence of oblique modulation of plasma density.

KW - Beam-plasma interaction

KW - Electromagnetic emission

KW - Generation of terahertz radiation

KW - SYSTEM

KW - LASER

KW - beam-plasma interaction

KW - electromagnetic emission

KW - PULSES

KW - SUBTERAHERTZ RADIATION

KW - WAVES

KW - SPECTROSCOPY

KW - 2-STREAM INSTABILITY

KW - generation of terahertz radiation

KW - TURBULENCE

KW - EMISSION

KW - OSCILLATIONS

UR - http://www.scopus.com/inward/record.url?scp=85082395012&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/ab72e3

DO - 10.1088/1361-6587/ab72e3

M3 - Article

AN - SCOPUS:85082395012

VL - 62

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 4

M1 - 045002

ER -

ID: 23875766