Simulations of Conjugate Heating Experiments Including Suprathermal Electron Transport

Details Simulations of Conjugate Heating Experiments Including Suprathermal Electron Transport Simulations of Conjugate Heating Experiments Including Suprathermal Electron Transport

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa43a1873v&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA43A-1873

Physics

[2403] Ionosphere / Active Experiments, [2447] Ionosphere / Modeling And Forecasting

Scientific paper

In anticipation of the new HF facility under construction at Arecibo and the planned relocation of an Advanced Modular Incoherent Scatter Radar to its conjugate point we have performed simulations of heating experiments using an expanded version of the SAMI2 model which includes suprathermal electron transport. The heater is modeled as an extra production term in the suprathermal electron transport equation. If none of the electrons produced have sufficient energy to escape then all of the heating occurs in the local ionosphere. In this case time delayed temperature enhancements can appear in the conjugate ionosphere as a result of thermal diffusion. Electrons produced with escape energies, however, heat both hemispheres essentially simultaneously. The prompt heating experienced by the conjugate ionosphere depends on the energy and pitch angle distributions of the escaping electrons as well as the initial thermospheric, ionospheric, and plasmaspheric conditions. The energy spectra of the suprathermal electrons in both hemispheres are complicated functions of the assumed production function due to transport effects and the numerous different types of inelastic collision processes. Finally, we show that gradients resulting from asymmetric heating can transport plasma between hemispheres.

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