Zobrazeno 1 - 10
of 534
pro vyhledávání: '"Dieckmann, M E"'
Ablating a target with an ultraintense laser pulse can create a cloud of collisionless plasma. A density ramp forms, in which the plasma density decreases and the ion's mean speed increases with distance from the plasma source. Its width increases wi
Externí odkaz:
http://arxiv.org/abs/2402.03925
We study with particle-in-cell (PIC) simulations the stability of fast magnetosonic shocks. They expand across a collisionless plasma and an orthogonal magnetic field that is aligned with one of the directions resolved by the 2D simulations. The shoc
Externí odkaz:
http://arxiv.org/abs/2307.07435
We study with a 3D PIC simulation discontinuities between an electron-positron pair plasma and magnetized electrons and protons. A pair plasma is injected at one simulation boundary with a speed 0.6$c$ along its normal. It expands into an electron-pr
Externí odkaz:
http://arxiv.org/abs/2306.05757
By means of a particle-in-cell (PIC) simulation, we study the interaction between a uniform magnetized ambient electron-proton plasma at rest and an unmagnetized pair plasma, which we inject at one simulation boundary with a mildly relativistic mean
Externí odkaz:
http://arxiv.org/abs/2208.12075
Publikováno v:
A&A 658, A100 (2022)
Context. Relativistic jets are ubiquitous in astrophysics. High Mass Microquasars (HMMQs) are useful labs to study such jets, as they are relatively close and evolve over observable time scales. The ambient medium into which the jet propagates is, ho
Externí odkaz:
http://arxiv.org/abs/2110.08116
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 of electron kinetic energy. The dominant instability within the jet was
Externí odkaz:
http://arxiv.org/abs/2011.00604
We study with a two-dimensional particle-in-cell simulation the stability of a discontinuity or piston, which separates an electron-positron cloud from a cooler electron-proton plasma. Such a piston might be present in the relativistic jets of accret
Externí odkaz:
http://arxiv.org/abs/2010.04981
We examine with particle-in-cell (PIC) simulations how a parallel shock in pair plasma reacts to upstream waves, which are driven by escaping downstream particles. Initially, the shock is sustained in the two-dimensional simulation by a magnetic fila
Externí odkaz:
http://arxiv.org/abs/2005.12549
Autor:
Bret, A, Dieckmann, M E
When two collisionless plasma shells collide, they interpenetrate and the overlapping region may turn Weibel unstable for some values of the collision parameters. This instability grows magnetic filaments which, at saturation, have to block the incom
Externí odkaz:
http://arxiv.org/abs/2001.03473
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 a PIC simulation a pair cloud with the temperature 400 keV and mean sp
Externí odkaz:
http://arxiv.org/abs/1810.05415