Results 21 to 30 of about 1,219,964 (199)
The Astrophysical Journal, 2009 The magnetic field of the solar corona has a large-scale dipole character, which maps into the bipolar field in the solar wind. Using standard representations of the coronal field, we show that high-energy ions can be trapped stably in these large-scale closed fields.
Hudson, H. S. +3 more
openaire +2 more sources
Radial Transport in the Earth’s Radiation Belts: Linear, Quasi-linear, and Higher-order Processes
The Astrophysical Journal Supplement Series, 2023 Observational studies of the Earth’s radiation belts indicate that Alfvénic fluctuations in the frequency range of 2–25 mHz accelerate electrons to relativistic energies.
Adnane Osmane +4 more
doaj +1 more source
Reconstruction of the Radiation Belts for Solar Cycles 17–24 (1933–2017)
Space Weather, 2021 We present a reconstruction of the dynamics of the radiation belts from solar cycles 17 to 24 which allows us to study how radiation belt activity has varied between the different solar cycles.
A. A. Saikin +5 more
doaj +1 more source
OMEP-EOR: A MeV proton flux specification model for electric orbit raising missions
Journal of Space Weather and Space Climate, 2021 Electric Orbit Raising (EOR) for telecommunication satellites significantly reduced on-board fuel mass at the price of extended transfer durations. These relatively long transfers, which usually span a few months, cross large spans of the radiation belts,
Brunet Antoine +4 more
doaj +1 more source
NARX Neural Network Derivations of the Outer Boundary Radiation Belt Electron Flux
Space Weather, 2022 We present two new empirical models of radiation belt electron flux at geostationary orbit. GOES‐15 measurements of 0.8 MeV electrons were used to train a Nonlinear Autoregressive with Exogenous input (NARX) neural network for both modeling GOES‐15 flux ...
D. A. Landis +7 more
doaj +1 more source
Radiation Belts and Their Environment [PDF]
, 2021 AbstractThe Van Allen radiation belts of high-energy electrons and ions, mostly protons, are embedded in the Earth’s inner magnetosphere where the geomagnetic field is close to that of a magnetic dipole. Understanding of the belts requires a thorough knowledge of the inner magnetosphere and its dynamics, the coupling of the solar wind to the ...
Hannu E. J. Koskinen +1 more
openaire +1 more source
Using MEPED observations to infer plasma density and chorus intensity in the radiation belts
Frontiers in Astronomy and Space Sciences, 2022 Efforts to model and predict energetic electron fluxes in the radiation belts are highly sensitive to local wave-particle interactions. In this study, we use multi-point measurements of precipitating and trapped electron fluxes to investigate the dynamic
William J. Longley +7 more
doaj +1 more source
Wave-induced loss of ultra-relativistic electrons in the Van Allen radiation belts. [PDF]
Nat Commun, 2016 The dipole configuration of the Earth’s magnetic field allows for the trapping of highly energetic particles, which form the radiation belts. Although significant advances have been made in understanding the acceleration mechanisms in the radiation belts,
Shprits YY +12 more
europepmc +2 more sources
Atmospheric losses of radiation belt electrons [PDF]
Journal of Geophysical Research: Space Physics, 2003 A numerical model of the low‐altitude energetic electron radiation belt, including the effects of pitch angle diffusion into the atmosphere and azimuthal drift, predicts lifetimes and longitude‐dependent loss rates as a function of electron energy and diffusion coefficient.
Selesnick, R. S. +2 more
openaire +2 more sources
, 2021 The “radiation belt remediation” phenomenon was observed naturally when lighting created a ‘safe zone’ in the radiation belt, motivating scientists to look for artificial ways to produce a similar ‘safe zone’ on a bigger scale to better protect space ...
Maringa, Mairiam
core +1 more source