title: Collision-driven negative-energy waves and the weibel instability of a relativistic electron beam in a quasineutral plasma.
abstract: A new model describing the Weibel instability of a relativistic electron beam propagating through a resistive plasma is developed. For finite-temperature beams, a new class of negative-energy magnetosound waves is identified, whose growth due to collisional dissipation destabilizes the beam-plasma system even for high beam temperatures. We perform 2D and 3D particle-in-cell simulations and show that in 3D geometry the Weibel instability persists even for collisionless background plasma. The anomalous plasma resistivity in 3D is caused by the two-stream instability.
authors.affiliation: Institut für Theoretische Physik I, Heinrich-Heine-Universität, Düsseldorf, 40225, Germany.
authors.forename: Anupam
authors.initials: A
authors.lastname: Karmakar
authors.forename: Naveen
authors.initials: N
authors.lastname: Kumar
authors.forename: Gennady
authors.initials: G
authors.lastname: Shvets
authors.forename: Oleg
authors.initials: O
authors.lastname: Polomarov
authors.forename: Alexander
authors.initials: A
authors.lastname: Pukhov