Two-dimensional particle-in-cell simulation of the expansion of a plasma into a rarefied medium
2011 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 13, no 7, 073023-1-073023-23 p.Article in journal (Refereed) Published
The expansion of a dense plasma through a more rarefied ionized medium has been studied by means of two-dimensional particle-in-cell simulations. The initial conditions involve a density jump by a factor of 100, located in the middle of an otherwise equally dense electron-proton plasma with uniform proton and electron temperatures of 10 eV and 1keV, respectively. Simulations show the creation of a purely electrostatic collisionless shock together with an ion-acoustic soliton tied to its downstream region. The shock front is seen to evolve in filamentary structures consistently with the onset of the ion-ion instability. Meanwhile, an un-magnetized drift instability is triggered in the core part of the dense plasma. Such results explain recent laser-plasma experiments, carried out in similar conditions, and are of intrinsic relevance to non-relativistic shock scenarios in the solar and astrophysical systems.
Place, publisher, year, edition, pages
IOP Publishing , 2011. Vol. 13, no 7, 073023-1-073023-23 p.
laser plasmas, pic simulations, electrostatic shock
National CategoryFusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:liu:diva-69681DOI: 10.1088/1367-2630/13/7/073023ISI: 000293885900002OAI: oai:DiVA.org:liu-69681DiVA: diva2:431084
FunderSwedish Research Council