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Journal Articles Physics of Plasmas Year : 2018

Expansion of a radially symmetric blast shell into a uniformly magnetized plasma

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1
M. E. Dieckmann
  • Function : Author
Q. Moreno
  • Function : Author
D. Doria
  • Function : Author
L. Romagnani
  • Function : Author
G. Sarri
  • Function : Author
A. Bret
  • Function : Author
E. d'Humières
  • Function : Author
M. Borghesi
  • Function : Author

Abstract

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.

Dates and versions

insu-03711227 , version 1 (01-07-2022)

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M. E. Dieckmann, Q. Moreno, D. Doria, L. Romagnani, G. Sarri, et al.. Expansion of a radially symmetric blast shell into a uniformly magnetized plasma. Physics of Plasmas, 2018, 25, ⟨10.1063/1.5024851⟩. ⟨insu-03711227⟩
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