Papers 

In review/preparation:

• Tsai, E., et al., Remote Sensing of Electron Precipitation Mechanisms Enabled by ELFIN Mission Operations and ADCS Design, Advances in Space Research: Science and Applied Research with Small Satellites (2024), preprint doi: 10.31224/3487, in review

• Qin, M., W. Li, Q. Ma, X.-C. Shen, L. Capannolo, and V. Angelopoulos et al. (2022), Global Distribution of Energetic Electron Precipitation at Low Earth Orbit from ELFIN Observations, Geophys. Res. Lett., in review.

• Relativistic electron precipitation events driven by solar wind impact on the Earth’s magnetosphere, preprint doi: https://doi.org/10.48550/arXiv.2311.02468 (Alexa, in review)

• Whistler Mode Wave-Driven Electron Scattering Properties from ELFIN Measurements of the Precipitation Ratio (Xiaochen Shen, submitted to Geophysical Research Letters)

• Two types of EMIC wave dispersion from ELFIN's perspective (Grach, in review)

• EMIC wave effects on ionization (Luisa Capannolo, in review)

• Intense storm time precipitation event thru WTS (ongoing)

• Angelopoulos, V. et al. (2024), Atmospheric Scattering, in preparation.

Published:

• 4/2024 @ Journal of Geophysical Research: First direct observations of relativistic electron precipitation driven by the combined scattering of whistler and EMIC waves

  • Bashir, M., et al. (2024) First direct observations of relativistic electron precipitation driven by the combined scattering of whistler and EMIC waves, Journal of Geophysical Research: Space Physics, accepted/in press.

• 4/2024 @ Geophysical Research Letters: Sub-MeV electron precipitation driven by EMIC waves through nonlinear fractional resonances

  • Hanzelka, M., Li, W., Qin, M., Capannolo, L., Shen, X., Ma, Q., et al. (2024). Sub-MeV electron precipitation driven by EMIC waves through nonlinear fractional resonances. Geophysical Research Letters, 51, e2023GL107355. https://doi.org/10.1029/2023GL107355

• 3/2024 @ Journal of Geophysical Research: Nonresonant scattering of energetic electrons by electromagnetic ion cyclotron waves: spacecraft observations and theoretical framework

  • An, X., Artemyev, A., Angelopoulos, V., Zhang, X.-J., Mourenas, D., Bortnik, J., & Shi, X. (2024). Nonresonant scattering of energetic electrons by electromagnetic ion cyclotron waves: Spacecraft observations and theoretical framework. Journal of Geophysical Research: Space Physics, 129, e2023JA031863. https://doi.org/10.1029/2023JA031863

• 3/2024 @ Journal of Geophysical Research: Key factors determining nightside energetic electron losses driven by whistler-mode waves

  • Tsai, E., Artemyev, A., Ma, Q., Mourenas, D., Agapitov, O., Zhang, X.-J., & Angelopoulos, V. (2024). Key factors determining nightside energetic electron losses driven by whistler-mode waves. Journal of Geophysical Research: Space Physics, 129, e2023JA032351. https://doi.org/10.1029/2023JA032351

• 2/2024 @ Geophysical Research Letters: Sub-MeV Electron Precipitation Driven by EMIC Waves through Nonlinear Fractional Resonances

  • Hanzelka, M., Li, W., Qin, M., Capannolo, L., Shen, X., Ma, Q., Gan, L., Angelopoulos, V. (2024) Sub-MeV Electron Precipitation Driven by EMIC Waves through Nonlinear Fractional Resonances, Geophysical Research Letters, in press.

• 2/2024 @ Geophysical Research Letters: Energetic particle precipitation in sub-auroral polarization streams

  • Artemyev, A. V., Zou, Y., Zhang, X.-J., Meng, X., & Angelopoulos, V. (2024). Energetic particle precipitation in sub-auroral polarization streams. Geophysical Research Letters, 51, e2023GL107731. https://doi.org/10.1029/2023GL107731

• 2/2024 @ Journal of Geophysical Research: Relativistic electron precipitation driven by mesoscale transients, inferred from ground and multi-spacecraft platforms

  • Artemyev, A. V., Zhang, X.-J., Demekhov, A. G., Meng, X., Angelopoulos, V., & Fedorenko, Y. V. (2024). Relativistic electron precipitation driven by mesoscale transients, inferred from ground and multi-spacecraft platforms. Journal of Geophysical Research: Space Physics, 129, e2023JA032287. https://doi.org/10.1029/2023JA032287

• 1/2024 @ Journal of Geophysical Research: Checking key assumptions of the Kennel-Petschek flux limit with ELFIN CubeSats

  • Mourenas, D., Artemyev, A. V., Zhang, X.-J., & Angelopoulos, V. (2024). Checking key assumptions of the Kennel-Petschek flux limit with ELFIN CubeSats. Journal of Geophysical Research: Space Physics, 129, e2023JA032193. https://doi.org/10.1029/2023JA032193

• 12/2023 @ Journal of Geophysical Research: Dispersed relativistic electron precipitation patterns between the ion and electron isotropy boundaries

  • Artemyev, A. V., Angelopoulos, V., Zhang, X.-J., Chen, L., & Runov, A. (2023). Dispersed relativistic electron precipitation patterns between the ion and electron isotropy boundaries. Journal of Geophysical Research: Space Physics, 128, e2023JA032200. https://doi.org/10.1029/2023JA032200

• 11/2023 @ Geophysical Research Letters: Ionospheric plasma density gradients associated with night-side energetic electron precipitation

  • Zhang, X.-J., Meng, X., Artemyev, A. V., Zou, Y., & Mourenas, D. (2023). Ionospheric plasma density gradients associated with night-side energetic electron precipitation. Geophysical Research Letters, 50, e2023GL105630. https://doi.org/10.1029/2023GL105630

• 11/2023 @ Geophysical Research Letters: Electron precipitation observed by ELFIN using proton precipitation as a proxy for electromagnetic ion cyclotron (EMIC) waves

  • Capannolo, L., Li, W., Ma, Q., Qin, M., Shen, X.-C., Angelopoulos, V., Artemyev, A., Zhang, X.-J., Hanzelka, M. (2023). Electron precipitation observed by ELFIN using proton precipitation as a proxy for electromagnetic ion cyclotron (EMIC) waves. Geophysical Research Letters, 50, e2023GL103519. https://doi.org/10.1029/2023GL103519

• 10/2023 @ Earth and Space Science: Kinetic modeling of radiation belt electrons with Geant4 to study energetic particle precipitation in Earth's atmosphere

  • Berland, G. D., Marshall, R. A., Capannolo, L., McCarthy, M. P., & Zheng, L. (2023). Kinetic modeling of radiation belt electrons with Geant4 to study energetic particle precipitation in Earth's atmosphere. Earth and Space Science, 10, e2023EA002987. https://doi.org/10.1029/2023EA002987

• 9/2023 @ Journal of Geophysical Research: Statistical Characteristics of the Electron Isotropy Boundary

  • Wilkins, C., Angelopoulos, V., Runov, A., Artemyev, A., Zhang, X.-J., Liu, J., & Tsai, E. (2023). Statistical Characteristics of the Electron Isotropy Boundary. Journal of Geophysical Research: Space Physics, 128, e2023JA031774. https://doi.org/10.1029/2023JA031774

• 9/2023 @ Journal of Geophysical Research: Energetic electron flux dropouts measured by ELFIN in the ionospheric projection of the plasma sheet

  • Shen, Y., Artemyev, A. V., Runov, A., Angelopoulos, V., Liu, J., Zhang, X.-J., et al. (2023). Energetic electron flux dropouts measured by ELFIN in the ionospheric projection of the plasma sheet. Journal of Geophysical Research: Space Physics, 128, e2023JA031631. https://doi.org/10.1029/2023JA031631

• 8/2023 @ Journal of Geophysical Research: Upper Limit on Outer Radiation Belt Electron Flux: Kennel-Petschek Flux Limit with Energy Diffusion

  • Mourenas, D., Artemyev, A. V., Zhang, X.-J., & Angelopoulos, V. (2023). Upper Limit on Outer Radiation Belt Electron Flux based on Dynamical Equilibrium. Journal of Geophysical Research: Space Physics, 128, e2023JA031676. https://doi.org/10.1029/2023JA031676

• 7/2023 @ Journal of Geophysical Research: Investigating whistler-mode wave intensity along field lines using electron precipitation measurements

  • Tsai, E., Artemyev, A., Angelopoulos, V., & Zhang, X.-J. (2023). Investigating whistler-mode wave intensity along field lines using electron precipitation measurements. Journal of Geophysical Research: Space Physics, 128, e2023JA031578. https://doi.org/10.1029/2023JA031578

• 7/2023 @ Space Science Reviews: Energetic electron precipitation driven by electromagnetic ion cyclotron waves: First results from ELFIN

  • Angelopoulos, V., Zhang, XJ., Artemyev, A.V. et al. Energetic Electron Precipitation Driven by Electromagnetic Ion Cyclotron Waves from ELFIN’s Low Altitude Perspective. Space Sci Rev 219, 37 (2023). https://doi.org/10.1007/s11214-023-00984-w

• 3/2023 @ Journal of Geophysical Research: Contribution of kinetic Alfvén waves to energetic electron precipitation from the plasma sheet during a substorm

  • Shen, Y., Artemyev, A. V., Zhang, X.-J., Zou, Y., Angelopoulos, V., Vasko, I., et al. (2023). Contribution of kinetic Alfvén waves to energetic electron precipitation from the plasma sheet during a substorm. Journal of Geophysical Research: Space Physics, 128, e2023JA031350. https://doi.org/10.1029/2023JA031350

• 3/2023 @ Geophysical Research Letters: Modulation of Energetic Electron Precipitation Driven by Three Types of Whistler Mode Waves

  • Shen, X.-C., Li, W., Capannolo, L., Ma, Q., Qin, M., Artemyev, A. V., et al. (2023). Modulation of energetic electron precipitation driven by three types of whistler mode waves. Geophysical Research Letters, 50, e2022GL101682. https://doi.org/10.1029/2022GL101682

• 1/2023 @ Geophysical Research Letters: Bursty energetic electron precipitation by high-order resonance with very-oblique whistler-mode waves

  • Gan, L., Artemyev, A., Li, W., Zhang, X.-J., Ma, Q., Mourenas, D., et al. (2023). Bursty energetic electron precipitation by high-order resonance with very-oblique whistler-mode waves. Geophysical Research Letters, 50, e2022GL101920. https://doi.org/10.1029/2022GL101920

• 12/2022 @ Journal of Geophysical Research: Temporal Scales of Electron Precipitation Driven by Whistler-Mode Waves

  • Zhang, X.-J., Angelopoulos, V., Artemyev, A., Mourenas, D., Agapitov, O., Tsai, E., & Wilkins, C. (2023). Temporal scales of electron precipitation driven by whistler-mode waves. Journal of Geophysical Research: Space Physics, 128, e2022JA031087. https://doi.org/10.1029/2022JA031087

• 12/2022 @ Journal of Geophysical Research: On the role of ULF waves in the spatial and temporal periodicity of energetic electron precipitation

  • Shi, X., Zhang, X.-J., Artemyev, A., Angelopoulos, V., Hartinger, M. D., Tsai, E., & Wilkins, C. (2022). On the role of ULF waves in the spatial and temporal periodicity of energetic electron precipitation. Journal of Geophysical Research: Space Physics, 127, e2022JA030932. https://doi.org/10.1029/2022JA030932

• 11/2022 @ Journal of Geophysical Research: Extreme energy spectra of relativistic electron flux in the outer radiation belt

  • Mourenas, D., Artemyev, A. V., Zhang, X.-J., & Angelopoulos, V. (2022). Extreme energy spectra of relativistic electron flux in the outer radiation belt. Journal of Geophysical Research: Space Physics, 127, e2022JA031038. https://doi.org/10.1029/2022JA031038

• 11/2022 @ Journal of Geophysical Research: Inner belt WISP precipitation from ELFIN: regimes of energetic electron scattering by VLF transmitter waves

  • Shen, Y., Artemyev, A. V., Ma, Q., Zhang, X.-J., Mourenas, D., Tsai, E., Wilkins, C., Wu, J., Angelopoulos, V. (2022). Inner belt wisp precipitation measured by ELFIN: Regimes of energetic electron scattering by VLF transmitter waves. Journal of Geophysical Research: Space Physics, 127, e2022JA030968. https://doi.org/10.1029/2022JA030968

• 9/2022 @ Physical Review Letters: Nonresonant scattering of relativistic electrons by electromagnetic ion cyclotron waves in the Earth’s radiation belts

  • An, X., Artemyev, A. V., Angelopoulos, V., Zhang, X.-J., Mourenas, D., Bortnik, J. (2022), Nonresonant scattering of relativistic electrons by electromagnetic ion cyclotron waves in the Earth’s radiation belts, Phys. Rev. Lett., 129, 135101. https://doi.org/10.1103/PhysRevLett.129.135101

• 9/2022 @ Journal of Geophysical Research: Thinning of the magnetotail current sheet inferred from low-altitude observations of energetic electrons

  • Artemyev, A. V., Angelopoulos, V., Zhang, X.-J., Runov, A., Petrukovich, A., Nakamura, R., Tsai, E., Wilkins, C. (2022). Thinning of the magnetotail current sheet inferred from low-altitude observations of energetic electrons. Journal of Geophysical Research: Space Physics, 127, e2022JA030705. https://doi.org/10.1029/2022JA030705

• 8/2022 @ Journal of Geophysical Research: Relativistic Electron Precipitation by EMIC Waves: Importance of Nonlinear Resonant Effects

  • Grach, V. S., Artemyev, A. V., Demekhov, A. G., Zhang, X.-J., Bortnik, J., Angelopoulos, V., Nakamura, R., Tsai, E., Wilkins, C., Roberts, O. W. (2022). Relativistic electron precipitation by EMIC waves: Importance of nonlinear resonant effects. Geophysical Research Letters, 49, e2022GL099994. https://doi.org/10.1029/2022GL099994

• 7/2022 @ Journal of Geophysical Research: Tens to hundreds of keV electron precipitation driven by kinetic Alfven waves during an electron injection

  • Shen, Y., Artemyev, A. V., Zhang, X.-J., Angelopoulos, V., Vasko, I. Y., Turner, D. L., Tsai, E., Wilkins, C., Ergun, R. E., Giles, B. L., Russell, C. T. (2022), Tens to hundreds of keV electron precipitation driven by kinetic Alfvén waves during an electron injection. Journal of Geophysical Research: Space Physics, 127, e2022JA030360. http://doi.org/10.1029/2022JA030360

• 5/2022 @ Journal of Geophysical Research: On the nature of intense sub-relativistic electron precipitations

  • Artemyev, A. V., Zhang, X.-J., Zou, Y., Mourenas, D., Angelopoulos, V., Vainchtein, D., Tsai, E., Wilkins, C. (2022), On the nature of intense sub-relativistic electron precipitation. Journal of Geophysical Research: Space Physics, 127, e2022JA030571. https://doi.org/10.1029/2022JA030571

• 5/2022 @ Journal of Geophysical Research: Short Chorus Wave Packets: Generation within Chorus Elements, Statistics, and Consequences on Energetic Electron Precipitation

  • Mourenas D., Zhang, X.-J., Nunn, D., Artemyev, A. V., Angelopoulos, V., Tsai, E., Wilkins, C. (2022), Short Chorus Wave Packets: Generation within Chorus Elements, Statistics, and Consequences on Energetic Electron Precipitation, Journal of Geophysical Research: Space Physics, 127, e2022JA030310. https://doi.org/10.1029/2022JA030310

• 4/2022 @ Journal of Geophysical Research: Relativistic electron precipitation driven by non-linear resonance with whistler-mode waves

  • Tsai, E., Artemyev A. V., Zhang, X.-J., Angelopoulos, V. (2022), Relativistic electron precipitation driven by non-linear resonance with whistler-mode waves, J. Geophys. Res., 127, e2022JA030338. https://doi.org/10.1029/2022JA030338

• 4/2022 @ Journal of Geophysical Research: Characteristics of Electron Microburst Precipitation based on High-Resolution ELFIN Measurements

  • Zhang, X.-J., Angelopoulos, V., Mourenas, D., Artemyev, A. V., Tsai, E., Wilkins, C. (2022), Characteristics of Electron Microburst Precipitation based on High-Resolution ELFIN Measurements, J. Geophys. Res., 127, e2022JA030509. https://doi.org/10.1029/2022JA030509

• 3/2022 @ Journal of Geophysical Research: On the role of whistler-mode waves in electron interaction with dipolarizing flux bundles

  • Artemyev A. V., Neishtadt, A. I., Angelopoulos, V. (2022), On the role of whistler-mode waves in electron interaction with dipolarizing flux bundles, Journal of Geophysical Research: Space Physics, 127, e2022JA030265. https://doi.org/10.1029/2022JA030265.

• 3/2022 @ Nature Communications: Superfast Precipitation of Energetic Electrons in Earth’s Radiation Belts

  • Zhang, XJ., Artemyev, A., Angelopoulos, V. Tsai, E., Wilkins, C., Kasahara, S., Mourenas, D., Yokota, S., Keika, K., Hori, T., Miyoshi, Y., Shinohara, I. Matsuoka, A., (2022) Superfast precipitation of energetic electrons in the radiation belts of the Earth. Nat. Comm. 13, 1611. https://doi.org/10.1038/s41467-022-29291-8

  • NASA Press Release, UCLA Press Release, MIT Technology Review China

  • Nature Communications Editor’s Highlight and invited “Behind the Paper” Blog Post

• 2/2022 @ Geophysical Research Letters: Ducted Chorus waves Cause Sub-Relativistic and Relativistic Electron Microbursts

  • Chen. L., Zhang, X.-J., Artemyev, A. V., Angelopoulos, V., Tsai, E., Wilkins, C., Horne, R. (2022), Ducted Chorus waves Cause Sub-Relativistic and Relativistic Electron Microbursts. Geophys. Res. Lett., 49, e2021GL097559. https://doi.org/10.1029/2021GL097559

• 11/2021 @ Journal of Geophysical Research: Electron Lifetimes and Diffusion Rates inferred from ELFIN Measurements at Low Altitude: First Results

  • Mourenas, D., Artemyev, A. V., Zhang, X.-J., Angelopoulos, V., Tsai, E., Wilkins, C. (2021), Electron Lifetimes and Diffusion Rates inferred from ELFIN Measurements at Low Altitude: First Results., J. Geophys. Res., 126, e2021JA029757. https://doi.org/10.1029/2021JA029757

• 10/2021 @ Journal of Geophysical Research: Role of ducting in relativistic electron loss by whistler-mode wave scattering

  • Artemyev, A. V., Demekhov, A. G., Zhang, X.-J., Angelopoulos, V., Mourenas, D., Fedorenko, Y. V., Manninen, J., Tsai, E., Wilkins, C., Kasahara, S., Miyoshi, Y., Matsuoka, A., Kasahara, Y., Mitani, T., Yokota, S., Keika, K., Hori, T., Matsuda, S., Nakamura, S., Kitahara, M., Takashima, T., Shinohara, I. (2021), Role of ducting in relativistic electron loss by whistler-mode wave scattering. J. Geophys. Res., 126, e2021JA029851. https://doi.org/10.1029/2021JA029851

• 7/2020 @ Space Science Reviews: The ELFIN Mission

  • Angelopoulos, V., Tsai, E., Bingley, L. et al. The ELFIN Mission. Space Sci Rev 216, 103 (2020), https://doi.org/10.1007/s11214-020-00721-7

ELFIN-Lomonosov:

• 6/2023 @ Geophysical Research Letters: MLT Dependence of Relativistic Electron Scattering Into the Drift Loss Cone: Measurements From ELFIN-L on Board Lomonosov Spacecraft

  • Shprits, Y. Y., Michaelis, I., Wang, D., Allison, H., Vasile, R., Runov, A., et al. (2023). MLT dependence of relativistic electron scattering into the drift loss cone: Measurements from ELFIN-L on board Lomonosov spacecraft. Geophysical Research Letters, 50, e2023GL103342. https://doi.org/10.1029/2023GL103342

• 2/2018 @ Space Science Reviews: Scientific Objectives of Electron Losses and Fields INvestigation Onboard Lomonosov Satellite

  • Shprits, Y.Y., Angelopoulos, V., Russell, C.T. et al. Scientific Objectives of Electron Losses and Fields INvestigation Onboard Lomonosov Satellite. Space Sci Rev 214, 25 (2018). https://doi.org/10.1007/s11214-017-0455-4

Presentations

• 12/2022 @ AGU Fall Meeting 2022

• 6/2022 @ GEM Summer Workshop 2022 - Best Inner Magnetosphere Section Poster, awarded to Colin Wilkins

• 12/2021 @ AGU Fall Meeting 2021

• 08/2021 @ URSI GASS 2021

• 08/2021 @ URSI GASS 2021

• 09/2021 @ VGEM 2021

• 05/2021 @ Van Allen Probes Community Workshop

• 07/2020 @ AOGS 2020

• 11/2019 @ 4th COSPAR Symposium: Small satellites for sustainable Science And Development (The potential of LEO CubeSats for science, and radiation environment specification)

• 11/2019 @ 4th COSPAR Symposium: Small satellites for sustainable Science And Development (ELFIN Mission Overview and First Light Results)

• 4/2019 @ Calpoly Dev Workshop: Lessons Learned from ELFIN, UCLA’s Student Space Weather Mission (slides can be found here)

• 09/2018 @ MRODF II Workshop

• 8/2016 @ AIAA/USU Conference on Small Satellites: Instruments/Science Missions: Electron Losses and Fields Investigation

• 4/2014 @ CubeSat Developers Workshop: ELFIN: An Update

• 4/2013 @ CubeSat Developers Workshop: Mission Overview

Posters

• 12/2023 @ AGU Fall Meeting

• 12/2022 @ AGU Fall Meeting

• 12/2021 @ AGU Fall Meeting

• 12/2020 @ AGU Fall Meeting

• 12/2019 @ AGU Fall Meeting: Initial Survey of Energetic Particle Detector Flux Distributions Measured by UCLA’s ELFIN CubeSats

• 12/2019 @ AGU Fall Meeting: First results from the ELFIN mission

• 07/2019 @ 2019 IEEE Space Computing Conference (PDF)

• 07/2019 @ Geospace Environment Modeling (GEM) (PDF)

• 12/2018 @ AGU Fall Meeting: Calibration and First-Light of the Energetic Particle Detectors on UCLA's Electron Losses and Fields Investigation (ELFIN) CubeSats

• 12/2017 @ AGU Fall Meeting: Initial Results from the Electron Losses and Fields Investigation Mission Onboard Lomonosov Satellite

• 12/2017 @ AGU Fall Meeting: Development and Testing of UCLA's Electron Losses and Fields Investigation (ELFIN) Instrument Payload

• 12/2016 @ AGU Fall Meeting: Calibration and Testing of the Energetic Particle Detector for the Electron Losses and Fields Investigation

• 12/2015 @ AGU Fall Meeting: The Electron Losses and Fields Investigation

• 8/2014 @ Small Satellite: ELFIN Overview and Update

• 4/2014 @ CubeSat Developers Workshop: Tuna Can Antenna Design For CubeSat Missions

• 2/2014 @ UCLA Tech Fair: Building an Attitude and Orbit Propagator to Simulate Magnetorquer-Based CubeSat Control Systems

• 2/2014 @ UCLA Tech Fair: Developing a Thermal Analysis Program for a Nanosatellite

• 4/2013 @ CubeSat Developers Workshop: A Study on the Need for Solar Panel Coverglass

• 4/2013 @ CubeSat Developers Workshop: Magentically Clean Antenna Design for CubeSats