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Physics Colloquium: Ionosphere-magnetosphere coupling driven by wave-particle resonant interaction
Wednesday, Oct. 16, 2019
4 p.m. - 5 p.m. Location: SLC 1.102

Dr. Xiaojia Zhang (UCLA)

Earth magnetosphere, the plasma environment of our planet, is shaped by solar wind flow interacting with the Earth's dipole magnetic field. The magnetosphere dynamics is driven by the solar wind transients and instabilities of the magnetotail, the night-side plasma region stretched in the anti-sunward direction. This dynamics is significantly controlled by the Earth ionosphere-magnetosphere coupling, which involves energy and plasma exchange between cold, collisional ionosphere and hot, collisionless magnetosphere. One of the most important process responsible for such coupling is the magnetospheric electron precipitations to the ionosphere, which changes the ionosphere conductance and drives the ionosphere outflow. Electron precipitations can be mostly attributed to their resonant scattering by electromagnetic and electrostatic waves. This presentation reviews such resonant interaction of the magnetotail electrons by two most widespread waves: electron cyclotron harmonic waves and whistler waves. We investigate mechanisms for the resonant interaction and describe models to quantify precipitating fluxes. Finally, we discuss the construction of ionosphere feedback model that would describe ionosphere self-consistent responses to the magnetosphere dynamics.  

Persons with disabilities may submit a request for accommodations to participate in this event at UT Dallas' ADA website. You may also call (972) 883-5331 for assistance or send an email to [email protected]. All requests should be received no later than 2 business days prior to the event.
Contact Info:
Michael Kesden, 972-883-3598
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