Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa51b1613o&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA51B-1613
Physics
[2415] Ionosphere / Equatorial Ionosphere, [2471] Ionosphere / Plasma Waves And Instabilities, [7959] Space Weather / Models
Scientific paper
Very good progress in simulating and understanding the large-scale development and evolution of spread-F irregularities has occurred in the past two decades. However, these simulations fail to accurately model this evolution at the small length-scales that reflect radar waves and cause scintillations. We present Particle-in-Cell (PIC) simulation results that demonstrate the transition of these irregularities from 80 m down to cm. This is the first fully kinetic study of this evolution. This talk focuses on periodic 2D simulations that are initialized as miniature 2D bubbles. It also presents preliminary 3D simulations. We also discuss how varying the background conditions, such as the zeroth-order electric field and the gradient length scale, affect the growth of short wavelength irregularities and the overall diffusion process. Lastly, we will compare our results with observational data.
Dimant Ya. S.
Oppenheim Meers M.
Tambouret Y.
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