326 citations · 1.4k across the 33 of their papers we have counts for
33 papers
Three-Dimensional Particle-In-Cell Simulations of Two-Dimensional Bernstein-Greene-Kruskal Modes
M. T. Franciscovich, J. McClung, K. Germaschewski +1
In this paper, we present three-dimensional (3D) Particle-In-Cell (PIC) simulations to study the stability of 2D Bernstein-Greene-Kruskal (BGK) modes in a magnetized plasma with a…
On the Effect of Driving Turbulent-like Fluctuations on a Harris-Current Sheet Configuration and the Formation of Plasmoids
Jeffersson Andres Agudelo Rueda, Yi-Hsin Liu, Kai Germaschewski +2
Energy dissipation in collisionless plasmas is one of the most outstanding open questions in plasma physics. Magnetic reconnection and turbulence are two phenomena that can produce…
High-Resolution Particle-In-Cell Simulations of Two-Dimensional Bernstein-Greene-Kruskal Modes
J. McClung, M. T. Franciscovich, K. Germaschewski +1
We present two dimensional (2D) particle-in-cell (PIC) simulations of 2D Bernstein-Greene-Kruskal (BGK) modes, which are exact nonlinear steady-state solutions of the Vlasov-Poisso…
Relating the Phases of Magnetic Reconnection Growth to the Temporal Evolution of X-line Structures in a Collisionless Plasma
D. S. Payne, R. B. Torbert, K. Germaschewski +2
The efficiency of energy conversion during magnetic reconnection is related to the reconnection rate. While the stable reconnection rate has been studied extensively, its growth be…
Energy transport during 3D small-scale reconnection driven by anisotropic plasma turbulence
Jeffersson A. Agudelo Rueda, Daniel Verscharen, Robert T. Wicks +6
Energy dissipation in collisionless plasmas is a longstanding fundamental physics problem. Although it is well known that magnetic reconnection and turbulence are coupled and trans…
In Search of a Data Driven Symbolic Multi-Fluid 10-Moment Model Closure
John Donaghy, Kai Germaschewski
The inclusion of kinetic effects into fluid models has been a long standing problem in magnetic reconnection and plasma physics. Generally the pressure tensor is reduced to a scala…
Global gyrokinetic simulations of ASDEX Upgrade up to the transport time-scale with GENE-Tango
A. Di Siena, A. Banon Navarro, T. Luda +12
An accurate description of turbulence up to the transport time scale is essential for predicting core plasma profiles and enabling reliable calculations for designing advanced scen…
A novel kinetic mechanism for the onset of fast magnetic reconnection and plasmoid instabilities in collisionless plasmas
W. Fox, G. Fiksel, D. B. Schaeffer +9
Magnetic reconnection can explosively release magnetic energy when opposing magnetic fields merge and annihilate through a current sheet, driving plasma jets and accelerating non-t…
Recommendations to clarify NASA open source requirements
John D. Haiducek, Thom R. Edwards, Wade Duvall +3
The software community has specific definitions for terms such as "open source software," "free software," and "permissive license," but scientists proposing software development e…
Inference and De-Noising of Non-Gaussian Particle Distribution Functions: A Generative Modeling Approach
John Donaghy, Kai Germaschewski
The particle-in-cell numerical method of plasma physics balances a trade-off between computational cost and intrinsic noise. Inference on data produced by these simulations general…
Three-dimensional magnetic reconnection in particle-in-cell simulations of anisotropic plasma turbulence
Jeffersson A. Agudelo Rueda, Daniel Verscharen, Robert T. Wicks +6
We use 3D fully kinetic particle-in-cell simulations to study the occurrence of magnetic reconnection in a simulation of decaying turbulence created by anisotropic counter-propagat…
Kinetic simulations of electron pre-energization by magnetized collisionless shocks in expanding laboratory plasmas
K. V. Lezhnin, W. Fox, D. B. Schaeffer +4
Collisionless shocks are common features in space and astrophysical systems where supersonic plasma flows interact, such as in the solar wind, the heliopause, and supernova remnant…
Weibel instability drives large magnetic field generation in laser-driven single plume ablation
Jackson Matteucci, Will Fox, Amitava Bhattacharjee +6
First-principles kinetic simulations are used to investigate magnetic field generation processes in expanding ablated plasmas relevant to laser-driven foils and hohlraums. In addit…
Exact and Locally Implicit Source Term Solvers for Multifluid-Maxwell Systems
Liang Wang, Ammar Hakim, Jonathan Ng +2
Recently, a family of models that couple multifluid systems to the full Maxwell equations draw a lot of attention in laboratory, space, and astrophysical plasma modeling. These mod…
Global Ten-Moment Multifluid Simulations of the Solar Wind Interaction with Mercury: From the Planetary Conducting Core to the Dynamic Magnetosphere
Chuanfei Dong, Liang Wang, Ammar Hakim +4
For the first time, we explore the tightly coupled interior-magnetosphere system of Mercury by employing a three-dimensional ten-moment multifluid model. This novel fluid model inc…
Particle Velocity Distributions in Developing Magnetized Collisionless Shocks in Laser-Produced Plasmas
D. B. Schaeffer, W. Fox, R. K. Follett +5
We present the first laboratory observations of time-resolved electron and ion velocity distributions in forming, magnetized collisionless shocks. Thomson scattering of a probe las…
Regimes of magnetic reconnection in colliding laser-produced magnetized plasma bubbles
K. V. Lezhnin, W. Fox, J. Matteucci +4
We conduct a multiparametric study of driven magnetic reconnection relevant to recent experiments on colliding magnetized laser produced plasmas using particle-in-cell simulations.…
Generation of Electron Whistler Waves at the Mirror Mode Magnetic Holes: MMS Observations and PIC Simulation
Narges Ahmadi, Frederick Wilder, Robert Ergun +14
The Magnetospheric Multiscale (MMS) mission has observed electron whistler waves at the center and at the edges of magnetic holes in the dayside magnetosheath. The magnetic holes a…
Electron Physics in 3D Two-Fluid Ten-Moment Modeling of Ganymede's Magnetosphere
Liang Wang, Kai Germaschewski, Ammar Hakim +3
We studied the role of electron physics in 3D two-fluid 10-moment simulation of the Ganymede's magnetosphere. The model captures non-ideal physics like the Hall effect, the electro…
Biermann battery-mediated magnetic reconnection in 3-D colliding plasmas
Jackson Matteucci, Will Fox, Amitava Bhattacharjee +5
Recent experiments have demonstrated magnetic reconnection between colliding plasma plumes, where the reconnecting magnetic fields were self-generated in the plasma by the Biermann…
Simulation of Observed Magnetic Holes in the Magnetosheath
Narges Ahmadi, Kai Germaschewski, Joachim Raeder
Magnetic holes have been frequently observed in the magnetosheath of Earth and it is believed that these structures are the result of nonlinear evolution of mirror instability. Mir…
Generation and Evolution of High-Mach Number, Laser-Driven Magnetized Collisionless Shocks in the Laboratory
Derek Schaeffer, Will Fox, Dan Haberberger +5
Shocks act to convert incoming supersonic flows to heat, and in collisionless plasmas the shock layer forms on kinetic plasma scales through collective electromagnetic effects. The…
Effects of electron temperature anisotropy on proton mirror instability evolution
Narges Ahmadi, Kai Germaschewski, Joachim Raeder
Proton mirror modes are large amplitude nonpropagating structures frequently observed in the magnetosheath. It has been suggested that electron temperature anisotropy can enhance t…
The island coalescence problem: scaling of reconnection in extended fluid models including higher-order moments
Jonathan Ng, Yi-Min Huang, Ammar Hakim +5
As modeling of collisionless magnetic reconnection in most space plasmas with realistic parameters is beyond the capability of today's simulations, due to the separation between gl…