Test-Particle Simulation of the Interaction of Hot Electron Velocity Distribution with the Fine Structure of Chorus Emissions

0538810 - ÚFA 2021 US eng A - Abstract
Hanzelka, Miroslav - Santolík, Ondřej - Omura, Y.
Test-Particle Simulation of the Interaction of Hot Electron Velocity Distribution with the Fine Structure of Chorus Emissions.
AGU Fall Meeting. American Geophysical Union, 2020. SM032-0001.
[AGU Fall Meeting 2020. 01.12.2020-17.12.2020, online everywhere]
Institutional support: RVO:68378289
Keywords : magnetosphere * horus emissions * hot electron velocity
OECD category: Fluids and plasma physics (including surface physics)
https://agu.confex.com/agu/fm20/webprogram/Paper679719.html

We conduct a test-particle study of the interaction between hot electrons and a parallel-propagating rising-tone lower band chorus emission. The wave field is based on a model that utilizes the nonlinear theory of chorus growth and incorporates a realistic subpacket structure. Electrons are traced back in time and with the use of Liouville's theorem and assumptions on the initial, unperturbed distribution, the effect of the wave-particle interaction on hot electron velocity distribution is reconstructed. The perturbed distribution reveals a series of stripes of increased and decreased phase space density. Each stripe is associated with an electromagnetic hole structure which exists along the resonance velocity curve of each subpacket. Time-averaging of the perturbed distribution shows that rising-tone lower band chorus emissions produce a sharp decrease in electron density at low parallel velocities, which might be detectable by spacecraft particle instruments.
Permanent Link: http://hdl.handle.net/11104/0316650