49 citations · 324 across the 19 of their papers we have counts for
19 papers
Collision of two radial rarefaction waves in unmagnetized ambient plasma: effects of the ambient plasma density
Margaux François, Mark E. Dieckmann, Lorenzo Romagnani +2
The expansion of two circular rarefaction waves in vacuum or in a thin ambient plasma is examined with particle-in-cell simulations that resolve two spatial dimensions. In the simu…
Preferential acceleration of positrons by a filamentation instability between an electron-proton beam and a pair plasma beam
M E Dieckmann, S J Spencer, M Falk +1
Particle-in-cell (PIC) simulations of collisionless jets of electrons and positrons in an ambient electron-proton plasma have revealed an acceleration of positrons at the expense o…
Structure of a collisionless pair jet in a magnetized electron-proton plasma: Flow-aligned magnetic field
Mark Eric Dieckmann, Martin Falk, Peter Steneteg +6
We present the results from a particle-in-cell (PIC) simulation that models the interaction between a spatially localized electron-positron cloud and an electron-ion plasma. The la…
Structure of a collisionless pair jet in a magnetized electron-proton plasma: flow-aligned magnetic field
M E Dieckmann, D Folini, I Hotz +4
We study the effect a guiding magnetic field has on the formation and structure of a pair jet that propagates through a collisionless electron-proton plasma at rest. We model with…
Expansion of a radially symmetric blast shell into a uniformly magnetized plasma
M E Dieckmann, Q Moreno, D Doria +7
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…
Electrostatic and magnetic instabilities in the transition layer of a collisionless weakly relativistic pair shock
M E Dieckmann, A Bret
Energetic electromagnetic emissions by astrophysical jets like those that are launched during the collapse of a massive star and trigger gamma-ray bursts (GRBs) are partially attri…
Emergence of MHD structures in a collisionless PIC simulation plasma
M E Dieckmann, D Folini, R Walder +5
The expansion of a dense plasma into a dilute plasma across an initially uniform perpendicular magnetic field is followed with a one-dimensional particle-in-cell (PIC) simulation o…
Simulation study of the formation of a non-relativistic pair shock
Mark Eric Dieckmann, Antoine Bret
We examine with a particle-in-cell (PIC) simulation the collision of two equally dense clouds of cold pair plasma. The clouds interpenetrate until instabilities set in, which heat…
Hierarchy of instabilities for two counter-streaming magnetized pair beams
Antoine Bret
The instabilities triggered when two counter-streaming pair beams collide are analyzed. A guiding magnetic field is accounting for, while both beams are considered identical and co…
Parametric study of non-relativistic electrostatic shocks and the structure of their transition layer
ME Dieckmann, H Ahmed, G Sarri +5
Nonrelativistic electrostatic unmagnetized shocks are frequently observed in laboratory plasmas and they are likely to exist in astrophysical plasmas. Their maximum speed, expresse…
Shock creation and particle acceleration driven by plasma expansion into a rarefied medium
G. Sarri, I. Kourakis, M. E. Dieckmann +1
The expansion of a dense plasma through a more rarefied ionised medium is a phenomenon of interest in various physics environments ranging from astrophysics to high energy density…
PIC Simulations of the Temperature Anisotropy-Driven Weibel Instability: Analyzing the perpendicular mode
A Stockem, M E Dieckmann, R Schlickeiser
An instability driven by the thermal anisotropy of a single electron species is investigated in a 2D particle-in-cell (PIC) simulation. This instability is the one considered by We…
How large can the electron to proton mass ratio be in Particle-In-Cell simulations of unstable systems?
A. Bret, M. E. Dieckmann
Particle-in-cell (PIC) simulations are widely used as a tool to investigate instabilities that develop between a collisionless plasma and beams of charged particles. However, even…
Simulation of a collision-less planar electrostatic shock in a proton-electron plasma with a strong initial thermal pressure change
M E Dieckmann, G Sarri, L Romagnani +2
The localized deposition of the energy of a laser pulse, as it ablates a solid target, introduces high thermal pressure gradients in the plasma. The thermal expansion of this laser…
Electric field generation by the electron beam filamentation instability: Filament size effects
M E Dieckmann, A Bret
The filamentation instability (FI) of counter-propagating beams of electrons is modelled with a particle-in-cell simulation in one spatial dimension and with a high statistical pla…
The filamentation instability driven by warm electron beams: Statistics and electric field generation
M E Dieckmann
The filamentation instability of counterpropagating symmetric beams of electrons is examined with 1D and 2D particle-in-cell (PIC) simulations, which are oriented orthogonally to t…
Particle-in-cell simulation of a mildly relativistic collision of an electron-ion plasma carrying a quasi-parallel magnetic field: Electron acceleration and magnetic field amplification at supernova shocks
M E Dieckmann, G Murphy, A Meli +1
Plasma processes close to SNR shocks result in the amplification of magnetic fields and in the acceleration of electrons, injecting them into the diffusive acceleration mechanism.…
One-dimensional particle simulation of the filamentation instability: electrostatic field driven by the magnetic pressure gradient force
M. E. Dieckmann, I. Kourakis, M. Borghesi +1
Two counter-propagating cool and equally dense electron beams are modelled with particle-in-cell (PIC) simulations. The electron beam filamentation instability is examined in one s…
PIC simulations of the Thermal Anisotropy-Driven Weibel Instability: Field growth and phase space evolution upon saturation
A Stockem, M E Dieckmann, R Schlickeiser
The Weibel instability is investigated with PIC simulations of an initially unmagnetized and spatially uniform electron plasma. This instability, which is driven by the thermally a…