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Expansion of a radially symmetric blast shell into a uniformly magnetized plasma
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. (Scientific Visualization)ORCID iD: 0000-0003-4055-0552
Universite de Bordeaux, CNRS, CEA, CELIA, Talence, France.
Centre for Plasma Physics (CPP), Queen's University Belfast, UK.
Ecole Polytechnique, CNRS, LULI, Palaiseau, France.
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2018 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 25, no 5, article id 052108Article in journal (Refereed) Published
Abstract [en]

The expansion of a thermal pressure-driven radial blast shell into a dilute ambient plasma is examined with two-dimensional PIC simulations. The purpose is to determine if laminar shocks form in a collisionless plasma which resemble their magnetohydrodynamic counterparts. The ambient plasma is composed of electrons with the temperature of 2 keV and cool fully ionized nitrogen ions. It is permeated by a spatially uniform magnetic field. A forward shock forms between the shocked ambient medium and the pristine ambient medium, which changes from an ion acoustic one through a slow magnetosonic one to a fast magnetosonic shock with increasing shock propagation angles relative to the magnetic field. The slow magnetosonic shock that propagates obliquely to the magnetic field changes into a tangential discontinuity for a perpendicular propagation direction, which is in line with the magnetohydrodynamic model. The expulsion of the magnetic field by the expanding blast shell triggers an electron-cyclotron drift instability.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2018. Vol. 25, no 5, article id 052108
Keywords [en]
PIC simulation, shock, magnetized plasma
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-147775DOI: 10.1063/1.5024851ISI: 000433961800010Scopus ID: 2-s2.0-85046898862OAI: oai:DiVA.org:liu-147775DiVA, id: diva2:1205523
Note

Funding agencies: Grand Equipement National de Calcul Intensif (GENCI) [x2016046960, A0010506129]; EPSRC [EP/P02212X/1, EP/N027175/1]; CRAL (ENS de Lyon); French National Program for High Energy (PNHE)

Available from: 2018-05-14 Created: 2018-05-14 Last updated: 2018-06-28Bibliographically approved

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Dieckmann, Mark E

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