83 citations · 892 across the 63 of their papers we have counts for
64 papers
The Energetic Particle Detector Instrument on ELFIN
Colin Wilkins, Ryan Caron, Ethan Tsai +24
We present the design methodology, implementation, and data products of the Energetic Particle Detector (EPD) instrument on-board the Electron Losses and Fields Investigation (ELFI…
Evolution of lunar wake potentials: structure, energy conversion, and their imprints on velocity distributions
Xin An, Vassilis Angelopoulos, Jasper S. Halekas +4
We study the evolution of electric potentials in the lunar wake. The wake potential exhibits two distinct spatial scales. The macroscopic scale arises from solar wind expansion int…
Whistler-mode waves in near-equatorial THEMIS measurements: reconstruction of magnetic field spectra from electric field and plasma measurements
Declan Frawley, Dmitri L. Vainchtein, Anton V. Artemyev +1
Electromagnetic whistler-mode waves are a natural emission in the outer radiation belt and the Earth's magnetotail. The resonant interaction of these waves and energetic electrons…
First Observation of Multiple Very-Near-Earth Reconnection Events During a Single Storm Main Phase
Fekireselassie Beyene, Vassilis Angelopoulos, Christine Gabrielse +11
For the first time, this paper presents three very-near-Earth reconnection (VNERX) events observed within the same 12-hour-long storm main phase. The THEMIS inner probes observed t…
Parker Solar Probe Observations of Compound Reconnection Exhaust Boundaries and Mirror-Mode Structures in the Near-Sun Heliospheric Current Sheet
Weijie Sun, Tai Phan, Jia Huang +12
Magnetic reconnection is a fundamental physical process that can drive rapid conversion of magnetic energy into plasma bulk flows, thermal heating, and particle acceleration in spa…
Properties of the Stormtime Plasma Sheet at the Lunar Distance
A. Runov, V. Angelopoulos, A. V. Artemyev +1
The electron fluxes at energies 100\,keV are shown to be vanishing in the quiet time plasma sheet at geocentric distance of 60 Earth's radii (R) where the Moon traverses th…
Solar Energetic Particle Reflection by Precursor ICMEs: Multi-spacecraft Observations of Bi-Directional Electron Beams at 1 AU
Lucas Liuzzo, Wenwen Wei, Andrew R. Poppe +2
We present case studies of two impulsive solar energetic electron (SEE) events during which particles at energies from 1-600 keV were detected by THEMIS-ARTEMIS orbiting the Moon,…
Revisiting the Role of Plasma Sheet Bubbles in Stormtime Energy Transport Using RCM-I
Sina Sadeghzadeh, Frank Toffoletto, Vassilis Angelopoulos +1
Plasma sheet bubbles, defined as entropy-depleted flux tubes, are widely regarded as an efficient mechanism for transporting plasma into the inner magnetosphere during geomagnetic…
Inferring lunar wake potentials from electron phase space densities
Xin An, Shaosui Xu, Vassilis Angelopoulos +4
Inferring electric potentials from electron phase space density measurements in the lunar wake is complicated by two challenges: the asymmetry between the sunward and anti-sunward…
Ion pickup and velocity space thermalization at outer planet moons
Xin An, Miranda Chang, Hao Cao +2
Ion pickup at the outer planets' active moons is a fundamental plasma process in which newly ionized particles from moon exospheres interact with the ambient corotating plasma and…
Casewise and Cellwise Robust Tensor-on-Tensor Regression
Mehdi Hirari, Fabio Centofanti, Mia Hubert +1
Tensor-on-tensor regression is an important tool for the analysis of tensor data, aiming to predict a set of response tensors from a corresponding set of predictor tensors. However…
Cavitons Associated with Ion-Acoustic-Like Waves in Foreshock Transients
Runyi Liu, Terry Liu, Xin An +2
Foreshock transients upstream of the Earth's bow shock, such as foreshock bubbles and hot flow anomalies, are often characterized by reduced-density cores and strong plasma fluctua…
Energy transfer from MHD-scale slow-mode waves to kinetic-scale ion acoustic waves
Xiaofei Shi, Xin An, Vassilis Angelopoulos
Large-amplitude slow-mode waves are commonly observed near Earth's magnetopause. Recent observations show that these waves can occur simultaneously with kinetic-scale ion acoustic…
ARTEMIS observations of electrostatic shocks inside the lunar wake
Terry Z. Liu, Xin An, Vassilis Angelopoulos +1
When the solar wind encounters the Moon, a plasma void forms downstream of it, known as the lunar wake. In regions where the magnetic field is quasi-parallel to the plasma-vacuum b…
Exploring the Magnetotail from Low Altitudes: Evolution of Energetic Electron Flux During the Substorm Growth Phase
Weiqin Sun, Xiao-Jia Zhang, Anton V. Artemyev +3
The magnetospheric substorm, which plays a crucial role in flux and energy transport across Earth's magnetosphere, features the formation of a thin, elongated current sheet in the…
Plasma refilling of the lunar wake: plasma-vacuum interactions, electrostatic shocks, and electromagnetic instabilities
Xin An, Vassilis Angelopoulos, Terry Z. Liu +3
A plasma void forms downstream of the Moon when the solar wind impacts the lunar surface. This void gradually refills as the solar wind passes by, forming the lunar wake. We invest…
Excitation of whistler-mode waves by an electron temperature anisotropy in a laboratory plasma
Donglai Ma, Xin An, Jia Han +6
Naturally-occurring whistler-mode waves in near-Earth space play a crucial role in accelerating electrons to relativistic energies and scattering them in pitch angle, driving their…
Scaling of Particle Heating in Shocks and Magnetic Reconnection
Mitsuo Oka, Tai D. Phan, Marit Øieroset +4
Particles are heated efficiently through energy conversion processes such as shocks and magnetic reconnection in collisionless plasma environments. While empirical scaling laws for…
Streamer-like red line diffuse auroras driven by time domain structures and ECH waves associated with a plasma injection and braking ion flows
Yangyang Shen, Xu Zhang, Jun Liang +5
Auroral streamers are important meso-scale processes of dynamic magnetosphere-ionosphere coupling, typically studied using imagers sensitive to energetic (>1 keV) electron precipit…
Night-Side Relativistic Electron Precipitation Bursts in the Outer Radiation Belt: Insights from ELFIN and THEMIS
Xi Lu, Xiao-Jia Zhang, Anton V. Artemyev +2
Electromagnetic whistler-mode waves play a crucial role in the acceleration and precipitation of radiation belt electrons. Statistical surveys of wave characteristics suggest that…
Magnetospheric control of ionospheric TEC perturbations via whistler-mode and ULF waves
Yangyang Shen, Olga P. Verkhoglyadova, Anton Artemyev +4
The weakly ionized plasma in the Earth's ionosphere is controlled by a complex interplay between solar and magnetospheric inputs from above, atmospheric processes from below, and p…
Statistical Characteristics of the Proton Isotropy Boundary
Colin Wilkins, Vassilis Angelopoulos, Anton Artemyev +4
Using particle data from the ELFIN satellites, we present a statistical study of 284 proton isotropy boundary events on the nightside magnetosphere, characterizing their occurrence…
Relativistic and Ultra-Relativistic Electron Bursts in Earth's Magnetotail Observed by Low-Altitude Satellites
Xiao-Jia Zhang, Anton V. Artemyev, Xinlin Li +7
Earth's magnetotail, a night-side region characterized by stretched magnetic field lines and strong plasma currents, is the primary site for the release of magnetic field energy an…
Picturing global substorm dynamics in the magnetotail using low-altitude ELFIN measurements and data mining-based magnetic field reconstructions
Xiaofei Shi, Grant K. Stephens, Anton V. Artemyev +2
A global reconfiguration of the magnetotail characterizes substorms. Current sheet thinning, intensification, and magnetic field stretching are defining features of the substorm gr…