1. Space Plasma Research at UTA J. L. Horwitz Department of Physics The University of Texas at Arlington

2. UTA Space Plasma Group  Dr. J. L. Horwitz, Professor and Department Chair  Dr. Wen Zeng, Post-Doctoral Researcher  Ms. Fajer Jaafari, Doctoral Graduate Student  Cf. also Dr. Yi-Jiun Su, Assistant Professor of Physics  Funded by National Science Foundation and NASA

3. Magnetosphere

4. Magnetosphere

5. High-latitude Ionosphere

6. Auroras

7. POLAR/TIDE/UVI observations of ionospheric field-aligned flows and auroral forms at 5000 km Ù Stevenson et al.[2001] employed POLAR Southern perigee observations to elicit relationships of high- latitude O + field-aligned flows observed by TIDE to auroral forms by UVI. Ù Typically, auroral emissions associated with upflows, dark regions with down-flows. POLAR/TIDE Parallel Flows with Auroral Forms for May 4,1996

8.  It is useful to divide the field-aligned ionospheric flows according to altitude region: ù F-region/topside up/down flows-->300--1000 km altitude, 300--1000 km altitude, <1-2 eV, gravitation- ally-bound, influenced by frictional ion heating, ambi- polar electric fields, soft electron precipitation-Te, ionization. ù Energized ion outflows-- >1200-3 R E, 10-10 4 eV, conics, beams, perp. wave heating, parallel E-fields, etc.

9. Dynamic Fluid-Kinetic(DyFK) treatment for ionospheric field-aligned flows Dynamic Fluid-Kinetic(DyFK) treatment for ionospheric field-aligned flows  Estep et al.[1999] and Wu et al.[1999, 2002] developed a time- dependent treatment for treating field-aligned plasma flow, joining a fluid treatment for the ionosphere (120-1100 km) to a GSK treatment for the upper altitude regions(800 km up) Ü Treating effects of soft electron precipitation, transverse ion heating and hot plasma-driven driven potentials, including a “pressure cooker” situation. Wu et al.[1999] Wu et al.[1999]

10. POLAR/TIDE-DyFK Comparisons in Cleft Ion Fountain Paradigm[Tu et al., 2005]

11. IMAGE/RPI Electron Densities

12. DyFK-IMAGE/RPI Comparisons: Simulation Convection Trajectories[Tu et al., 2004b]

13. DyFK-IMAGE/RPI-DMSP Profile 3 Comparison [Tu et al., 2004b]

14. DyFK-IMAGE/RPI-DMSP Profile 2 comparison with and without auroral processes [Tu et al., 2004b]

15. Characteristic Ion Distributions in the Dynamic Auroral Transition Region Characteristic Ion Distributions in the Dynamic Auroral Transition Region Zeng et al.[2005]