424 citations · 2.6k across the 108 of their papers we have counts for
23 papers · 1 filter
On the modeling of oblique firehose instabilities in regularized Kappa plasmas using ALPS
D. L. Schröder, M. Lazar, H. Fichtner +2
In-situ measurements in space plasmas indicate that the velocity distributions of charged particles are not in thermal equilibrium, deviating from a standard Maxwellian mainly due…
Physics of Circular Polarized Ion-Scale Waves in Hybrid Simulations of Alfvénic Fluctuations
Hai Yang Harry Qian, Trevor A. Bowen, Carlos A. Gonzalez +5
Ion cyclotron waves (ICW) and fast magnetosonic/whistler waves (FMW) are fundamental electromagnetic modes at ion kinetic scales, yet their generation mechanisms and roles in plasm…
The Ambipolar electric field in multispecies plasma atmospheres: effects of alpha particles and stochastic heating
Luca Barbieri, Pascal Démoulin, Daniel Verscharen
We investigate stationary states of a collisionless, gravitationally stratified plasma atmosphere composed of electrons, protons, and alpha particles by extending Pannekoek--Rossel…
Plasma Instabilities in Arbitrary Distributions: Comparison between ALPS and BO
Xudong Guo, Huasheng Xie, Kristopher G. Klein +3
Determining accurate wave dispersion relations is a central problem in plasma physics. Recent advances have enabled the numerical computation of linear dispersion relation in plasm…
Wave-particle equilibria with heavy ions in weakly collisional space plasmas
Nicolás Villarroel-Sepúlveda, Daniel Verscharen, Pablo S. Moya +2
Space plasmas are weakly collisional since characteristic time scales related to Coulomb collisions are much larger than those of Larmor gyration or wave--particle interactions. Th…
Significant Amplification of Turbulent Energy Dissipation through the Shock Transition at Mars
Wence Jiang, Hui Li, Nahuel Andrés +3
Turbulence is fundamental to energy transfer across scales in space and astrophysical plasmas. Bow shock interactions have long been hypothesized to significantly modify turbulence…
The Dielectric Response of Plasmas with Arbitrary Gyrotropic Velocity Distributions
Kristopher Klein, Daniel Verscharen
Hot and tenuous plasmas are frequently far from local thermodynamic equilibrium, necessitating sophisticated methods for determining the associated plasma dielectric tensor and nor…
The role of the thermal properties of electrons on the dispersion properties of Alfvén waves in space plasmas
Nicolás Villarroel-Sepúlveda, Pablo S. Moya, Rodrigo A. López +1
Context. The transition from left-hand to right-hand polarized Alfvén waves depends on the wavenumber, the ratio of kinetic to magnetic pressure , temperature anisotropy, and io…
Velocity Space Signatures of Resonant Energy Transfer between Whistler Waves and Electrons in the Earth's Magnetosheath
Wence Jiang, Daniel Verscharen, Seong-Yeop Jeong +4
Wave--particle interactions play a crucial role in transferring energy between electromagnetic fields and charged particles in space and astrophysical plasmas. Despite the prevalen…
HelioSwarm: A Multipoint, Multiscale Mission to Characterize Turbulence
Kristopher G. Klein, Harlan Spence, Olga Alexandrova +47
HelioSwarm (HS) is a NASA Medium-Class Explorer mission of the Heliophysics Division designed to explore the dynamic three-dimensional mechanisms controlling the physics of plasma…
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…
Whistler Waves As a Signature of Converging Magnetic Holes in Space Plasmas
Wence Jiang, Daniel Verscharen, Hui Li +2
Magnetic holes are plasma structures that trap a large number of particles in a magnetic field that is weaker than the field in its surroundings. The unprecedented high time-resolu…
Direct evidence of magnetic reconnection onset via the tearing instability
Mayur R. Bakrania, I. Jonathan Rae, Andrew P. Walsh +4
Magnetic reconnection is a sporadic process responsible for energy release in space and laboratory plasmas. It is believed that the tearing mode instability may be responsible for…
Coherence of ion cyclotron resonance for damping ion cyclotron waves in space plasmas
Qiaowen Luo, Xingyu Zhu, Jiansen He +4
Ion cyclotron resonance is one of the fundamental energy conversion processes through field-particle interaction in collisionless plasmas. However, the key evidence for ion cyclotr…
Power Anisotropy, Dispersion Signature and Turbulence Diffusion Region in the 3D Wavenumber Domain of Space Plasma Turbulence
Rong Lin, Jiansen He, Xingyu Zhu +4
We explore the multi-faceted important features of turbulence (e.g., anisotropy, dispersion, diffusion) in the three-dimensional (3D) wavenumber domain (, $k_{\perp,1}…
The Plasma Universe: A Coherent Science Theme for Voyage 2050
D. Verscharen, R. T. Wicks, G. Branduardi-Raymont +13
In review of the White Papers from the Voyage 2050 process and after the public presentation of a number of these papers in October 2019 in Madrid, we as White Paper lead authors h…
Using dimensionality reduction and clustering techniques to classify space plasma regimes
Mayur R. Bakrania, I. Jonathan Rae, Andrew P. Walsh +2
Collisionless space plasma environments are typically characterised by distinct particle populations. Although moments of their velocity distribution functions help in distinguishi…
[Plasma 2020 Decadal] Multipoint Measurements of the Solar Wind: A Proposed Advance for Studying Magnetized Turbulence
K. G. Klein, O. Alexandrova, J. Bookbinder +21
A multi-institutional, multi-national science team will soon submit a NASA proposal to build a constellation of spacecraft to fly into the near-Earth solar wind in a swarm spanning…
Stochastic proton heating by kinetic-Alfvén-wave turbulence in moderately high- plasmas
Ian W. Hoppock, Benjamin D. G. Chandran, Kristopher G. Klein +2
Stochastic heating refers to an increase in the average magnetic moment of charged particles interacting with electromagnetic fluctuations whose frequencies are smaller than the pa…
PIC Simulations of the Effect of Velocity Space Instabilities on Electron Viscosity and Thermal Conduction
Mario Riquelme, Eliot Quataert, Daniel Verscharen
In low-collisionality plasmas, velocity-space instabilities are a key mechanism providing an effective collisionality for the plasma. We use particle-in-cell (PIC) simulations to s…
Spectral evolution of two-dimensional kinetic plasma turbulence in the wavenumber-frequency domain
H. Comişel, D. Verscharen, Y. Narita +1
We present a method for studying the evolution of plasma turbulence by tracking dispersion relations in the energy spectrum in the wavenumber-frequency domain. We apply hybrid plas…
Compressive high-frequency waves riding on an Alfvén/ion-cyclotron wave in a multi-fluid plasma
Daniel Verscharen, Eckart Marsch
In this paper, we study the weakly-compressive high-frequency plasma waves which are superposed on a large-amplitude Alfvén wave in a multi-fluid plasma consisting of protons, elec…
On nonlinear Alfvén-cyclotron waves in multi-species plasma
Eckart Marsch, Daniel Verscharen
Large-amplitude Alfvén waves are ubiquitous in space plasmas and a main component of magnetohydrodynamic (MHD) turbulence in the heliosphere. As pump waves they are prone to parame…