The Weibel instability in a circular rarefaction wave
2012 (English)In: Proceedings of the 39th European Physical Society Conference & 16th Int. Congress on Plasma Physics, 2012, P1.176-1-P1.176-4 p.Conference paper, Presentation (Refereed)
Instabilities behind the front of a cylindrically expanding plasma have been investigated experimentally and with a particle-in-cell simulation. Tubelike filamentary structures form behind the front of a plasma created by irradiating wire targets with a ps-duration and intense ( 1019 W cm-2) laser pulse. These filaments exhibit coherent magnetic fields with a remarkable stability ( 103 / wp: plasma frequency). PIC simulations indicate that an instability driven by a thermal anisotropy of the electron population is the cause. This instability requires a plasma density gradient and hot electrons. It can thus contribute to the generation of strongsustained magnetic fields in astrophysical jets.
Place, publisher, year, edition, pages
2012. P1.176-1-P1.176-4 p.
plasma physics, laser plasma
IdentifiersURN: urn:nbn:se:liu:diva-79451OAI: oai:DiVA.org:liu-79451DiVA: diva2:542260
39th European Physical Society Conference & 16th Int. Congress on Plasma Physics, 2-6 July 2012, Stockholm
FunderSwedish Research Council, 2010-4063