Ray tracing study of propagation of lower-band whistler-mode emissions in outer radiation belts: A statistical approach

0491831 - ÚFA 2019 DE eng A - Abstrakt
Hanzelka, Miroslav - Santolík, Ondřej - Cornilleau-Wehrlin, N.
Ray tracing study of propagation of lower-band whistler-mode emissions in outer radiation belts: A statistical approach.
Geophysical Research Abstracts. Vol. 20. Göttingen: European Geosciences Union, 2018. EGU2018-4367-1. E-ISSN 1607-7962.
[EGU General Assembly 2018. 08.04.2018-13.04.2018, Vienna]
Institucionální podpora: RVO:68378289
Klíčová slova: lower-band emissions * whistler-mode emissions * radiation belts * Cluster spacecraft
Obor OECD: Fluids and plasma physics (including surface physics)
https://meetingorganizer.copernicus.org/EGU2018/EGU2018-4386.pdf

Lower-band whistler-mode electromagnetic waves play an important role in the dynamics of outer radiation belts.
To improve our understanding of ocurrence and behavior of these emissions, we run series of ray tracing simulations
in non-relativistic hot plasma for a broad range of initial conditions, analyse the spatial dependence of wave
properties and compare our results with long-term experimental data from the Cluster mission. The focus of the
study is on the wave vector angle and wave intensity distribution of chorus emissions at higher latitudes. In this
region, realistic empirical models of electron density distribution and Earth’s magnetic field are employed to obtain
reliable data from the simulation. Damping and growth of waves is computed during the propagation, based on an
empirical model of electron flux in outer magnetosphere. Other wave properties of importance are ellipticity of
polarization and Poynting vector angle, analysed here in dependence on latitude and magnetic field line.
Trvalý link: http://hdl.handle.net/11104/0285444