Xiaochen Shen
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View article: Global Survey of Whistler Mode Waves in the Earth's Magnetosheath Using THEMIS Observations
Global Survey of Whistler Mode Waves in the Earth's Magnetosheath Using THEMIS Observations Open
While it is known that whistler mode emissions are frequently detected in Earth's magnetosheath, their properties and dependence on solar wind conditions are not fully understood yet. In this study, we present the global distribution of wh…
View article: Lightning Generated Whistlers: Variability of Event‐Based Wave Distributions
Lightning Generated Whistlers: Variability of Event‐Based Wave Distributions Open
Lightning‐generated whistlers (LGWs) are an important wave mode in the inner magnetosphere, where they play a strong role in the radiation belt slot region formation through scattering of radiation belt electrons into the loss cone. Recent…
View article: Global Survey of Whistler‐Mode Waves in the Lunar Plasma Environment: Insights From 11 Years of ARTEMIS Observations
Global Survey of Whistler‐Mode Waves in the Lunar Plasma Environment: Insights From 11 Years of ARTEMIS Observations Open
Whistler‐mode waves are among the most ubiquitously observed plasma waves in the vicinity of Earth's Moon, providing an important diagnostic tool for plasma processes. However, a complete understanding of key plasma parameters responsible …
View article: Whistler Mode Wave‐Driven Electron Scattering Properties From ELFIN Measurements of the Precipitation Ratio
Whistler Mode Wave‐Driven Electron Scattering Properties From ELFIN Measurements of the Precipitation Ratio Open
Whistler‐mode chorus and hiss waves play an important role in Earth's radiation belt electron dynamics. Direct measurements of whistler wave‐driven electron precipitation and the resultant pitch angle distribution were previously limited b…
View article: Statistical Properties of Dayside Whistler‐Mode Waves at Low Latitudes Under Various Solar Wind Conditions
Statistical Properties of Dayside Whistler‐Mode Waves at Low Latitudes Under Various Solar Wind Conditions Open
While whistler‐mode waves are generated by injected anisotropic electrons on the nightside, the observed day‐night asymmetry of wave distributions raises an intriguing question about their generation on the dayside. In this study, we evalu…
View article: Energetic Electron Precipitation Driven by Whistler-Mode Waves: A Comparative Study at Earth and Jupiter
Energetic Electron Precipitation Driven by Whistler-Mode Waves: A Comparative Study at Earth and Jupiter Open
Within the magnetospheres of both Earth and Jupiter, a variety of whistler-mode waves are observed, including chorus and hiss waves. At Earth, chorus waves are predominantly found outside the plasmapause, whereas hiss waves are typically c…
View article: The global mapping of electron precipitation and ionospheric conductance from whistler-mode chorus waves
The global mapping of electron precipitation and ionospheric conductance from whistler-mode chorus waves Open
Auroral precipitation is the second major energy source after solar irradiation that ionizes the Earth’s upper atmosphere. Diffuse electron aurora caused by wave-particle interaction in the inner magnetosphere (L < 8) takes over 60% of …
View article: Modeling Global Electron Precipitation Driven by Whistler Mode Waves: Integrating Physical and Deep Learning Approaches
Modeling Global Electron Precipitation Driven by Whistler Mode Waves: Integrating Physical and Deep Learning Approaches Open
Whistler mode waves scatter energetic electrons, causing them to precipitate into the Earth's atmosphere. While the interactions between whistler mode waves and electrons are well understood, the global distribution of electron precipitati…
View article: Survey of Whistler‐Mode Wave Amplitudes and Frequency Spectra in Jupiter's Magnetosphere
Survey of Whistler‐Mode Wave Amplitudes and Frequency Spectra in Jupiter's Magnetosphere Open
We present statistical distributions of whistler‐mode chorus and hiss waves at frequencies ranging from the local proton gyrofrequency to the equatorial electron gyrofrequency ( f ce,eq ) in Jupiter's magnetosphere based on Juno measuremen…
View article: Properties of relativistic electron precipitation: a comparative analysis of wave-induced and field line curvature scattering processes
Properties of relativistic electron precipitation: a comparative analysis of wave-induced and field line curvature scattering processes Open
We analyze the properties of relativistic (>700 keV) electron precipitation (REP) events measured by the low-Earth-orbit (LEO) POES/MetOp constellation of spacecraft from 2012 through 2023. Leveraging the different profiles of REP obser…
View article: Statistical Survey of Interchange Events in the Jovian Magnetosphere Using Juno Observations
Statistical Survey of Interchange Events in the Jovian Magnetosphere Using Juno Observations Open
Interchange instability is known to drive fast radial transport of electrons and ions in Jupiter's inner and middle magnetosphere. In this study, we conduct a statistical survey to evaluate the properties of energetic particles and plasma …
View article: Imbalanced Regressive Neural Network Model for Whistler‐Mode Hiss Waves: Spatial and Temporal Evolution
Imbalanced Regressive Neural Network Model for Whistler‐Mode Hiss Waves: Spatial and Temporal Evolution Open
Whistler‐mode hiss waves are crucial to the dynamics of Earth's radiation belts, particularly in the scattering and loss of energetic electrons and forming the slot region between the inner and outer belts. The generation of hiss waves inv…
View article: Generation and Impacts of Whistler‐Mode Waves During Energetic Electron Injections in Jupiter's Outer Radiation Belt
Generation and Impacts of Whistler‐Mode Waves During Energetic Electron Injections in Jupiter's Outer Radiation Belt Open
Energetic particle injections are commonly observed in Jupiter's magnetosphere and have important impacts on the radiation belts. We evaluate the roles of electron injections in the dynamics of whistler‐mode waves and relativistic electron…
View article: Global Survey of Energetic Electron Precipitation at Low Earth Orbit Observed by ELFIN
Global Survey of Energetic Electron Precipitation at Low Earth Orbit Observed by ELFIN Open
We statistically evaluate the global distribution and energy spectrum of electron precipitation at low‐Earth‐orbit, using unprecedented pitch‐angle and energy resolved data from the Electron Losses and Fields INvestigation CubeSats. Our st…
View article: Whistler‐Mode Wave Generation During Interplanetary Shock Events in the Earth's Lunar Plasma Environment
Whistler‐Mode Wave Generation During Interplanetary Shock Events in the Earth's Lunar Plasma Environment Open
Whistler‐mode waves are commonly observed within the lunar environment, while their variations during Interplanetary (IP) shocks are not fully understood yet. In this paper, we analyze two IP shock events observed by Acceleration, Reconnec…
View article: Statistical Analysis of Whistler Precursors Upstream of Foreshock Transient Shocks: MMS Observations
Statistical Analysis of Whistler Precursors Upstream of Foreshock Transient Shocks: MMS Observations Open
Using the high‐time‐resolution data from the Magnetospheric Multiscale mission, precursor waves upstream of foreshock transient (FT) shocks are statistically investigated using the four‐spacecraft timing method. The wave frequencies and wa…
View article: Sub‐MeV Electron Precipitation Driven by EMIC Waves Through Nonlinear Fractional Resonances
Sub‐MeV Electron Precipitation Driven by EMIC Waves Through Nonlinear Fractional Resonances Open
Electromagnetic ion cyclotron waves in the Earth's outer radiation belt drive rapid electron losses through wave‐particle interactions. The precipitating electron flux can be high in the hundreds of keV energy range, well below the typical…
View article: Large Amplitude Whistler Waves in Earth's Plasmasphere and Plasmaspheric Plumes
Large Amplitude Whistler Waves in Earth's Plasmasphere and Plasmaspheric Plumes Open
Whistler mode waves in the plasmasphere and plumes drive significant losses of energetic electrons from the Earth's radiation belts into the upper atmosphere. In this study, we conducted a survey of amplitude‐dependent whistler wave proper…
View article: Cross‐Scale Modeling of Storm‐Time Radiation Belt Variability
Cross‐Scale Modeling of Storm‐Time Radiation Belt Variability Open
During geomagnetic storms relativistic outer radiation belt electron flux exhibits large variations on rapid time scales of minutes to days. Many competing acceleration and loss processes contribute to the dynamic variability of the radiat…
View article: Whistler‐Mode Waves Inside Short Large‐Amplitude Magnetic Field Structures: Characteristics and Generation Mechanisms
Whistler‐Mode Waves Inside Short Large‐Amplitude Magnetic Field Structures: Characteristics and Generation Mechanisms Open
Short large‐amplitude magnetic structures (SLAMS) frequently appear near the bow shock. Inside steepening SLAMS, whistler‐mode waves are coherently generated at their leading edges. These waves are crucial for electron dynamics, energy con…
View article: Large-scale magnetic field oscillations and their effects on modulating energetic electron precipitation
Large-scale magnetic field oscillations and their effects on modulating energetic electron precipitation Open
In this study, we present simultaneous multi-point observations of magnetospheric oscillations on a time scale of tens of minutes (forced-breathing mode) and modulated whistler-mode chorus waves, associated with concurrent energetic electr…
View article: Whistler - Mode Wave Generation During Interplanetary Shock Events in the Earth’s Lunar Plasma Environment
Whistler - Mode Wave Generation During Interplanetary Shock Events in the Earth’s Lunar Plasma Environment Open
Data Files for GRL Manuscript titled "Whistler - Mode Wave Generation During Interplanetary Shock Events in the Earth’s Lunar Plasma Environment"
View article: Dataset for "Evaluating the Performance of Empirical Models of Total Electron Density and Whistler-mode Wave Amplitude in the Earth’s Inner Magnetosphere"
Dataset for "Evaluating the Performance of Empirical Models of Total Electron Density and Whistler-mode Wave Amplitude in the Earth’s Inner Magnetosphere" Open
This is the dataset for the paper "Evaluating the Performance of Empirical Models of Total Electron Density and Whistler-mode Wave Amplitude in the Earth’s Inner Magnetosphere", submitted to Frontiers in Astronomy and Space Sciences by Qia…
View article: Plasma Wave and Particle Dynamics During Interchange Events in the Jovian Magnetosphere Using Juno Observations
Plasma Wave and Particle Dynamics During Interchange Events in the Jovian Magnetosphere Using Juno Observations Open
Interchange instability is known to drive fast radial transport of particles in Jupiter's inner magnetosphere. Magnetic flux tubes associated with the interchange instability often coincide with changes in particle distributions and plasma…
View article: Spontaneous nucleation of vortex–antivortex pairs in confined magnetic microstructures
Spontaneous nucleation of vortex–antivortex pairs in confined magnetic microstructures Open
Vortex–antivortex pairs have shown great potential in spintronics, where they can be used for information storage and logical devices. However, the physical mechanism for the nucleation of vortex–antivortex pairs is still unclear due to it…
View article: Electron Precipitation Observed by ELFIN Using Proton Precipitation as a Proxy for Electromagnetic Ion Cyclotron (EMIC) Waves
Electron Precipitation Observed by ELFIN Using Proton Precipitation as a Proxy for Electromagnetic Ion Cyclotron (EMIC) Waves Open
Electromagnetic ion cyclotron (EMIC) waves can drive radiation belt depletion and Low‐Earth Orbit satellites can detect the resulting electron and proton precipitation. The ELFIN (Electron Losses and Fields InvestigatioN) CubeSats provide …
View article: Cross-Scale Modeling of Storm-Time Radiation Belt Variability
Cross-Scale Modeling of Storm-Time Radiation Belt Variability Open
During geomagnetic storms relativistic outer radiation belt electron flux exhibits large variations on rapid time scales of minutes to days. Many competing acceleration and loss processes contribute to the dynamic variability of the radiat…
View article: Full-wave modeling of EMIC wave packets: ducted propagation and reflected waves
Full-wave modeling of EMIC wave packets: ducted propagation and reflected waves Open
Electromagnetic ion cyclotron (EMIC) waves can scatter radiation belt electrons with energies of a few hundred keV and higher. To accurately predict this scattering and the resulting precipitation of these relativistic electrons on short t…
View article: Distribution and Evolution of Chorus Waves Modeled by a Neural Network: The Importance of Imbalanced Regression
Distribution and Evolution of Chorus Waves Modeled by a Neural Network: The Importance of Imbalanced Regression Open
Whistler‐mode chorus waves play an essential role in the acceleration and loss of energetic electrons in the Earth’s inner magnetosphere, with the more intense waves producing the most dramatic effects. However, it is challenging to predic…