Collisionsless amplifying of longitudinal electron waves in two-stream plasma

Details Collisionsless amplifying of longitudinal electron waves in two-stream plasma Collisionsless amplifying of longitudinal electron waves in two-stream plasma

2007-08-06

arxiv.org/abs/0708.0767v1

"The Integrated Scientific Journal", n. 4, p. 61, 2006 (in Russian)

Physics

Plasma Physics

6 pages, 2 tables,PDF

Scientific paper

To better understanding the principal features of collisionless damping/growing plasma waves we have implemented a demonstrative calculation for the simplest cases of electron waves in two-stream plasmas with the delta-function type electron velocity distribution function of each of the streams with velocities v(1) and v(2). The traditional dispersion equation is reduced to an algebraic 4th order equation, for which numerical solutions are presented for a variant of equal stream densities. In the case of uniform half-infinite slab one finds two dominant type solutions: non-damping forward waves and forward complex conjugated exponentially both damping and growing waves. Beside it in this case there is no necessity of calculation any logarithmically divergent indefinite integrals. The possibility of wave amplifying might be useful in practical applications.

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