Oblique electromagnetic instabilities for an ultra relativistic electron beam passing through a plasma

Details Oblique electromagnetic instabilities for an ultra relativistic electron beam passing through a plasma Oblique electromagnetic instabilities for an ultra relativistic electron beam passing through a plasma

2006-04-07

arxiv.org/abs/physics/0604055v1

Europhys.Lett. 74 (2006) 1027-1031

Physics

Plasma Physics

5 pages, 3 figures, to appear in EuroPhysics Letters

Scientific paper

10.1209/epl/i2006-10045-5

We present an investigation of the electromagnetic instabilities which are trig gered when an ultra relativistic electron beam passes through a plasma. The linear growth rate is computed for every direction of propagation of the unstable modes, and temperatures are modelled using simple waterbag distribution functions. The ultra relativistic unstable spectrum is located around a very narrow band centered on a critical angle which value is given analytically. The growth rate of modes propagating in this direction decreases like k^(-1/3).

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