Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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. и др.
в: Plasma Physics and Controlled Fusion, Том 62, № 4, 045002, 19.02.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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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