Resonant Weibel instability in counterstreaming plasmas with temperature anisotropies
2010 (English)In: Journal of Plasma Physics, ISSN 0022-3778, Vol. 76, no 1, 49-56 p.Article in journal (Refereed) Published
The Weibel instability, driven by a plasma temperature anisotropy, is non-resonant with plasma particles: it is purely growing in time, and does not oscillate. The effect of a counterstreaming plasma is examined. In a counterstreaming plasma with an excess of transverse temperature, the Weibel instability arises along the streaming direction. Here it is proved that for large wave-numbers the instability becomes resonant with a finite real (oscillation) frequency, ωr ≠ 0. When the plasma flows faster, with a bulk velocity larger than the parallel thermal velocity, the instability becomes dominantly resonant. This new feature of the Weibel instability can be relevant for astrophysical sources of non-thermal emissions and the stability of counterflowing plasma experiments.
Place, publisher, year, edition, pages
2010. Vol. 76, no 1, 49-56 p.
magnetic field generation, instability
National CategoryFusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:liu:diva-52692DOI: 10.1017/S0022377809008101ISI: 000274550800007OAI: oai:DiVA.org:liu-52692DiVA: diva2:284720