A5100690573- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Spacecraft Design and Technology
- Atmospheric Ozone and Climate
- Electrohydrodynamics and Fluid Dynamics
- Gamma-ray bursts and supernovae
- Advanced Sensor and Energy Harvesting Materials
- Nanomaterials and Printing Technologies
- Planetary Science and Exploration
- Spacecraft and Cryogenic Technologies
- Plasma Diagnostics and Applications
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Astrophysics and Cosmic Phenomena
- Electrowetting and Microfluidic Technologies
- Satellite Communication Systems
- Laser-Plasma Interactions and Diagnostics
- Geophysics and Gravity Measurements
- Magnetic confinement fusion research
- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- earthquake and tectonic studies
University of Colorado Boulder
2016-2025
Wuhan National Laboratory for Optoelectronics
2022-2025
Huazhong University of Science and Technology
2020-2025
Laboratory for Atmospheric and Space Physics
2016-2025
Ningbo No. 2 Hospital
2024-2025
Anhui University of Science and Technology
2025
Shihezi University
2025
Anhui Science and Technology University
2025
Fermi National Accelerator Laboratory
2025
University of Chicago
2025
The Radiation Belt Storm Probes (RBSP)-Energetic Particle, Composition, and Thermal Plasma (ECT) suite contains an innovative complement of particle instruments to ensure the highest quality measurements ever made in inner magnetosphere radiation belts. coordinated RBSP-ECT measurements, analyzed combination with fields waves observations state-of-the-art theory modeling, are necessary for understanding acceleration, global distribution, variability belt electrons ions, key science...
The Electric Fields and Waves (EFW) Instruments on the two Radiation Belt Storm Probe (RBSP) spacecraft (recently renamed Van Allen Probes) are designed to measure three dimensional quasi-static low frequency electric fields waves associated with major mechanisms responsible for acceleration of energetic charged particles in inner magnetosphere Earth. For this measurement, instrument uses pairs spherical double probe sensors at ends orthogonal centripetally deployed booms spin plane...
We model the rapid (∼ 1 min) formation of a new electron radiation belt at L ≃ 2.5 that resulted from Storm Sudden Commencement (SSC) March 24, 1991 as observed by CRRES satellite. Guided electric and magnetic fields, we represent time‐dependent magnetospheric field during SSC an asymmetric bipolar pulse is associated with compression relaxation Earth's field. follow electrons using relativistic guiding center code. The test‐particle simulations show energies few MeV > 6 were energized up...
Abstract Strong enhancements of outer Van Allen belt electrons have been shown to a clear dependence on solar wind speed and the duration southward interplanetary magnetic field. However, individual case study analyses also demonstrated that many geomagnetic storms produce little in way and, fact, may substantial losses relativistic electrons. In this study, focused upon key period August–September 2014, we use GOES geostationary orbit electron flux data Probes particle fields process...
Since their discovery more than 50 years ago, Earth's Van Allen radiation belts have been considered to consist of two distinct zones trapped, highly energetic charged particles. The outer zone is composed predominantly megaelectron volt (MeV) electrons that wax and wane in intensity on time scales ranging from hours days, depending primarily external forcing by the solar wind. spatially separated inner commingled high-energy very positive ions (mostly protons), latter being stable levels...
The disappearance and reappearance of outer zone energetic electrons during the November 3–4, 1993, magnetic storm is examined utilizing data from Solar, Anomalous, Magnetospheric Particle Explorer (SAMPEX), Global Positioning System (GPS) series, Los Alamos National Laboratory (LANL) sensors onboard geosynchronous satellites. relativistic electron flux drops main phase in association with large negative interplanetary B z rapid solar wind pressure increase late on 3. Outer E > 3 MeV...
Solar wind measurements are used to predict the MeV electron radiation belt flux at position of geostationary orbit. Using a model based on standard radial diffusion equation, prediction efficiency 0.81 and linear correlation 0.90 were achieved for years 1995–1996 logarithm average daily flux. Model parameters 1995‐1996 gave 1995–1999 0.59 0.80, respectively. The equation is solved after making coefficient function solar velocity interplanetary magnetic field. most important parameter...
The term “dispersionless injection” refers to a class of events which show simultaneous enhancement (injection) electrons and ions with different energies usually seen at or near geosynchronous orbit. We that dispersionless injections can be understood as consequence changes in the electric magnetic fields by modeling an electron injection event observed early on January 10, 1997 means test‐particle simulation. model background field is basic dipole made asymmetrical compressed dayside...
The Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX), a low‐altitude polar‐orbiting satellite, has provided long‐term global picture of the radiation belts since its launch on July 3, 1992. While inner belt ( L < 2) protons appear to have only solar cycle variation, outer > electrons vary cycle, semiannual, rotation time scales, with geomagnetic storms. Recently developed models predicting MeV electron at geostationary orbit [Li et al., 2001] Dst index [Temerin Li, based...
The Dst index is predicted on the basis of solar wind for years 1995–2002 using an update previous Temerin and Li [2002] prediction model . updated based additional data from 2000–2002 corresponding to maximum cycle includes several large magnetic storms. For this 8‐year period, linear correlation between 0.956, efficiency 0.914, RMS error 6.65 nT (nanoTesla). An analysis some in indicates that at least 25% remaining due effect a portion Sq ionospheric current system close 99% variance...
Abstract The dual‐spacecraft Van Allen Probes mission has provided a new window into mega electron volt (MeV) particle dynamics in the Earth's radiation belts. Observations (up to E ~10 MeV) show clearly behavior of outer belt at different timescales: months‐long periods gradual inward radial diffusive transport and weak loss being punctuated by dramatic flux changes driven strong solar wind transient events. We present analysis multi‐MeV phase space density (PSD) during March 2013 context...
Abstract The past decade transformed our observational understanding of energetic particle processes in near‐Earth space. An unprecedented suite systems was operation including the Van Allen Probes, Arase, Magnetospheric Multiscale, Time History Events and Macroscale Interactions during Substorms, Cluster, GPS, GOES, Los Alamos National Laboratory‐GEO magnetospheric missions. They were supported by conjugate low‐altitude measurements on spacecraft, balloons, ground‐based arrays. Together,...
Abstract Based on 7 years' observations from Time History of Events and Macroscale Interactions during Substorms (THEMIS), we investigate the statistical distribution electric field Pc5 ULF wave power under different geomagnetic activities calculate radial diffusion coefficient due to field, , for outer radiation belt electrons. A simple empirical expression is also derived. Subsequently, compare previous D LL models find similar Kp dependence with model, which based in situ measurements....
Abstract Two of the largest geomagnetic storms last decade were witnessed in 2015. On 17 March 2015, a coronal mass ejection‐driven event occurred with Dst (storm time ring current index) value reaching −223 nT. 22 June 2015 another strong storm ( −204 nT) was recorded. These two each produced almost total loss radiation belt high‐energy E ≳ 1 MeV) electron fluxes. Following dropouts fluxes there complex and rather remarkable recoveries electrons extending up to nearly 10 MeV kinetic energy....
Abstract To achieve a better understanding of the dominant loss mechanisms for rapid dropouts radiation belt electrons, three distinct dropout events observed by Van Allen Probes are comprehensively investigated. For each event, observations pitch angle distribution electron fluxes and electromagnetic ion cyclotron (EMIC) waves analyzed to determine effects atmospheric precipitation due scattering induced EMIC waves. Last closed drift shells (LCDS) magnetopause standoff position obtained...
In addition to clarifying morphological structures of the Earth's radiation belts, it has also been a major achievement Van Allen Probes mission understand more thoroughly how highly relativistic and ultrarelativistic electrons are accelerated deep inside belts. Prior studies have demonstrated that up energies 10 megaelectron volts (MeV) can be produced over broad regions outer zone on timescales minutes few hours. It often is seen geomagnetic activity driven by strong solar storms (i.e.,...
Electrohydrodynamic jet printing is a promising technology for high-resolution direct printing. This review provides comprehensive summary of the fabrication and methods various functional materials (and inks) practical devices.
Abstract CIRBE (Colorado Inner Radiation Belt Experiment), a 3U CubeSat, was launched on 15 April 2023 into sun synchronous orbit (97.4° inclination and 509 km altitude). The sole science payload onboard is REPTile‐2 (Relativistic Electron Proton Telescope integrated little experiment—2), an advanced version of REPTile which operated in space between 2012 2014. has 60 channels for electrons (0.25–6 MeV) protons (6.5–100 MeV). It been working well, capturing detailed dynamics the radiation...
The rising prevalence of diabetes has led to an increased focus on real-time glucose monitoring. Wearable sensor patches allow noninvasive, monitoring, reducing patient discomfort compared invasive sensors. However, most existing rely complex and contaminating metal vapor deposition technologies, which pose limitations in practical production. In this study, we propose a novel approach for preparing graphite/multiwall carbon nanotubes (MWCNT)/reduced graphene oxide (rGO) using high-viscosity...
Abstract Unwanted ice formations may cause severe functional degradations of facilities and also have a negative impact on their lifespans. Avoiding removing accumulation is always hot topic in the industrial technological field. Bionic surfaces been greatly studied for several decades proved to be excellent candidates passive anti‐/deicing applications. However, drawbacks limit potential uses under harsh conditions, like low temperatures high humidity. Most researches bionic are focused...
An explicit model for predicting Dst based on solar wind data the years 1995–1999 gives a good fit with prediction efficiency of 88%, linear correlation coefficient between index and 0.94, RMS error 6.4 nT. The same applied to first half 2000 gave 91%, 0.95, 7.9 modeled is sum three terms that have growth decay, dynamic pressure term, an interplanetary magnetic field some offset terms. main innovations are decay different time constants ranging from 5 days 1 hour all except offsets depend...