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Nonlinear Theory of the Instability of a Modulated Electron Beam of Low Density in a Plasma IV. Excitation of Nonresonant Waves

✍ Scribed by K. J. G. Kruscha; A. N. Kondratenko

Publisher: John Wiley and Sons
Year: 1983
Tongue: English
Weight: 588 KB
Volume: 23
Category: Article
ISSN: 0005-8025
DOI: 10.1002/ctpp.19830230503

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✦ Synopsis

A system of nonlinear equations derived in a previous paper which describes the erolution of nonresonant waves in beam-plasma systems is solved numerically. It is given a physical interpretation of essential features of the nonresonant beom-plasma instability. The significant influence of higher harmonics on the evolution of a n electron beam in the plssma which is modulated on L nonresonant unstable frequency, is investigated. The interaction of unstable nonresonant and resonant waves in beam-plasma systems is examined. It is shown that the evolution of resonant waves can be essentially influenced by an initial modulation of the beam on an unstable nonresonant frequency. The role of a n initial velocity modulation of the beam for t h r influence of the wave spectrum is demonstrated.

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Sekt. Physik/Ekkhnlk der UnlrenltAt Gnlfiw8ld. DDR, Greifmald (a); Chrkov State Unlvernlty. UBBR, Chukov (h)