From 1 - 3 / 3
  • Drift-averaged pitch angle diffusion coefficients, and derived pitch angle distributions and loss timescales for electrons with energies from 100 keV to 4 MeV, L* in the range 2 to 7 and geomagnetic activity determined by the Kp index. The pitch angle distributions and loss timescales, for use in radiation belt models, are calculated from the diffusion coefficients assuming pure pitch angle diffusion and steady decay of the distribution. Funding was provided by NERC grant NE/V00249X/1 (Sat-Risk)

  • AE9_diff_omni_spec_L.txt describes the 99 percentile equatorial omnidirectional differential flux from the AE9 model at different orbits. equatorial_extreme_flux_n=2.txt describes what the equatorial flux would be at different L shells, using the data from (Meredith, 2023), during a 1 in 10, 1 in 50, and 1 in 100-year event. currents_vs_L.txt describes what the charging current at equilibrium of a coaxial cable would be, at different L shells (on the equatorial plane) during a 1 in 100-year event. All the other files describe what the maximum value of electric field within the dielectric layer of a coaxial cable would be, at different L shells (on the equatorial plane) during a 1 in 100-year event. However, they differ in whether the worst-case estimate from LANL GEO satellites were also included, and differ in the value of kp (which controls the impact of radiation induced conductivity) used for the model simulation. Both variables are described within the filenames. Funding: Supported in part by Natural Environment Research Council (NERC) grants NE/V00249X/1 (Sat-Risk), NE/X000389/1, NE/R016038/1, and NE/Y006178/1 (PRESCIENT).

  • Radiation belts are hazardous regions found around several of the planets in our Solar System. They consist of very hot, electrically charged particles that are trapped in the magnetic field of the planet. At Saturn the most important way to heat these particles has for many years been thought to involve the particles drifting closer towards the planet. This paper adds to the emerging idea at Saturn that a different way to heat the particles is also possible where the heating is done by waves, in a similar way to what we find at the Earth. This work is reported in the paper "Rapid electron acceleration in low density regions of Saturn''s radiation belt by whistler mode chorus waves" by E.E. Woodfield et al., 2019. The data provided here enable reconstruction of all the figures in the paper. The research leading to these results has received funding from: Natural Environment Research Council (NERC), UK, grants NE/R016038/1 and NE/R016445/1 Science and Technology Facilities Council (STFC), UK, grants ST/I001727/1 and ST/M00130X/1. NASA grants NNX11AM36G and NNX16AI47G. The research at the University of Iowa was supported by NASA through Contract 1415150 with the Jet Propulsion Laboratory. European Council (EC) grant H2020 637302.