Field-aligned chorus wave spectral power in Earth's outer radiation belt

摘要: Abstract. Chorus-type whistler waves are one of the most intense electromagnetic generated naturally in magnetosphere. These have a substantial impact on radiation belt dynamics as they thought to contribute electron acceleration and losses into ionosphere through resonant wave–particle interaction. Our study is devoted determination chorus wave power distribution frequency wide range magnetic latitudes, from 0 40°. We use 10 years electric field measured by STAFF-SA onboard Cluster spacecraft model initial (equatorial) spectral power, well PEACE RAPID measurements properties energetic electrons (~ 0.1–100 keV) outer belt. The dependence this upon latitude obtained then consistently reproduced along certain L-shell (4 ≤ L 6.5), employing WHAMP-based ray tracing simulations hot plasma within realistic inner magnetospheric model. show here that, increases, peak globally shifted towards lower frequencies. Making our simulations, variations can be explained mostly terms damping amplification, but also cross-L propagation. results good agreement with previous studies extent using data different (Cluster, POLAR THEMIS). employed calculate pitch angle energy diffusion rates, resulting more effective scattering (electron lifetime halved) less acceleration. parameters thus used improve accuracy coefficient calculations.