Academic Lecture——Very Low Frequency Science in the near-Earth Space Region

Time: 10：00a.m Saturday，May 6，2023
Place: Lecture Hall, 5th Floor, School of Electronic Information, Wuhan University
Speaker: Poorya Hosseini

Abstract:
When satellites are launched into space, they are immediately bombarded by a population of energetic charged particles that are trapped by the Earth’s magnetic field, called the Van Allen radiation belts. In periods of strong solar activity, the number of energetic particles can drastically increase and stay there for years. Over time, these particles degrade and destroy satellite electronics and disrupt GPS signals. Very Low Frequency (~1-30 kHz) waves has been shown to be a key driver of the removal of these trapped particles, by propagating as a `whistler' wave (named for how it sounds in an audio playback) through the magnetosphere. Interaction between VLF whistler waves and energetic electrons (with energies ranging from 1 keV to several MeV) in the near-Earth space region is the key topic here.

Biography:
Poorya Hosseini received his B.S. and Ph.D. degree in electrical engineering from the K. N. Toosi University of Technology, Tehran, Iran, in 2014; and the University of Colorado Denver, Colorado, USA, in 2021, respectively; where his PhD dissertation was on electromagnetic wave propagation in the Earth's ionosphere and magnetosphere. He then spent two years at the Johns Hopkins University Applied Physics Laboratory as a Postdoctoral Fellow in the Space Exploration Sector. His research interests include the theoretical, experimental and numerical analysis of electromagnetic waves in plasmas.