Student: Gohl Stefan
Školitel: Doc. RNDr. František Němec, Ph.D.
Konzultant: RNDr. Peter Rubovič, Ph.D.
Stav práce: zadaná
Anotace:
Fluxes of energetic particles trapped in the Van Allen radiation belts are ultimately controlled by several competing phenomena. Most importantly, they can be energized due to both radial diffusion and wave-particle interactions. These can be, on the other hand, responsible for breaking down the first adiabatic invariant, pitch angle diffusion, and subsequent precipitation. Additionally, during periods of sudden magnetospheric compressions, particles primarily at larger L-shells can be lost due to a magnetopause shadowing. We suppose to use energetic particle data obtained by particle instruments at low altitude spacecraft to systematically analyze radiation belt dynamics and individual phenomena taking place. An example of such instrument is a pixelized detector of the Timepix family developed within the Medipix collaboration installed on satellites by an IEAP CTU team. A special attention should be paid to energetic particle flux variations at the times of interplanetary shock arrivals and substorms, and to related variations of the global magnetic field configuration and simultaneously observed wave phenomena. Furthermore, the possibility to develop a dedicated detector for such phenomena should be investigated.