Camporeale, E. (Enrico)

English

CWI's Institutional Repository

Geophysical Research AbstractsVol. 16, EGU2014-8849, 2014EGU General Assembly 2014© Author(s) 2014. CC Attribution 3.0 License.Implicit Particle-in-Cell simulations of wave-particle interactions betweenelectrons and whistler waves in the radiation beltEnrico CamporealeMultiscale Dynamics, Centrum Wiskunde & Informatica (CWI), Amsterdam, Netherlands (e.camporeale@cwi.nl)Whistler wave chorus are believed to play a crucial role in the radiation belt dynamics, possibly being responsiblefor the loss and acceleration of energetic electrons.For this reason, the mechanisms related to the formation and propagation of whistlers in the radiation belt havebeen intensively investigated during the last decade.It is now generally acknowledged, via observational and simulation studies, that the whistler waves generated closeto the magnetic equator through linear temperature anisotropy instabilities undergo an amplitude amplification thatis essentially regulated by nonlinear mechanisms.In this work we focus on the wave-particle interaction between electrons and whistler chorus by employing two-dimensional fully-kinetic Particle-in-Cell simulations. The magnetic field is assumed to form a magnetic bottlethat captures the particle bouncing motions and mimics the Earth’s magnetic dipole.The code employs a semi-implicit time stepping algorithm that, in this context, is shown to be important in orderto achieve accurate results with realistic parameters.We analyze and discuss the pitch-angle/energy scattering of energetic particles and comment on the applicabilityof the quasi-linear diffusion paradigm.

Implicit Particle-in-Cell simulations of wave-particle interactions between electrons and whistler waves in the radiation belt

Abstract

Similar works

Full text

Available Versions

CWI's Institutional Repository

NARCIS