The propagation of a dense quasi-neutral ion beam across a magnetized plasma

Details The propagation of a dense quasi-neutral ion beam across a magnetized plasma The propagation of a dense quasi-neutral ion beam across a magnetized plasma

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.110..371t&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 110, no. 2, March 1985, p. 371-378. Sponsorship: Bundesministerium für For

Astronomy and Astrophysics

Astrophysics

9

Cold Plasmas, Ion Beams, Ion Injection, Plasma Interactions, Plasma-Particle Interactions, Space Plasmas, Mathematical Models, Neutral Beams, Polarization (Charge Separation), Propagation Velocity

Scientific paper

Propagation of a quasi-neutral narrow ion beam across a magnetized cold plasma is investigated in slab geometry. This problem is of interest in connection with artificial beam injection experiments and with naturally appearing plasma injections into magnetic fields as astrophysical jets. Several different cases are discussed briefly where the beam is assumed either slow or fast. For fast beams it is shown that they propagate due to generation of a polarization electric field even in the case of presence of a background plasma. Slow beams can depolarize by currents flowing into the beam along the field lines and providing the required electrons for charge neutralization. Some implications of the model are discussed in the context of recent active beam injection experiments into space plasma.

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