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Generation of a purely electrostatic collisionless shock during the expansion of a dense plasma through a rarefied medium
Queen's University Belfast.
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0003-4055-0552
Queen's University Belfast.
Queen's University Belfast.
2011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 107, no 2, 025003-1-025003-4 p.Article in journal (Refereed) Published
Abstract [en]

A two-dimensional numerical study of the expansion of a dense plasma through a more rarefied one is reported. The electrostatic ion-acoustic shock, which is generated during the expansion, accelerates the electrons of the rarefied plasma inducing a superthermal population which reduces electron thermal anisotropy. The Weibel instability is therefore not triggered and no self-generated magnetic fields are observed, in contrast with published theoretical results dealing with plasma expansion into vacuum. The shock front develops a filamentary structure which is interpreted as the consequence of the electrostatic ion-ion instability, consistently with published analytical models and results.

Place, publisher, year, edition, pages
2011. Vol. 107, no 2, 025003-1-025003-4 p.
Keyword [en]
simulation, shock, electrostatic wave
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-69642DOI: 10.1103/PhysRevLett.107.025003OAI: oai:DiVA.org:liu-69642DiVA: diva2:430420
Projects
Vetenskapsradet Dnr: 2010-4063
Funder
Swedish Research Council, 2010-4063
Available from: 2011-07-08 Created: 2011-07-08 Last updated: 2017-12-11

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Publisher's full texthttp://link.aps.org/doi/10.1103/PhysRevLett.107.025003

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Dieckmann, Mark Eric

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