1. 招生信息 | | Dr. Streltsov and Dr. Nykyri (plasma and magnetosphere)
The Department of Physical Sciences at Embry-Riddle Aeronautical University (ERAU) at Daytona Beach, FL invites applicants for 2014 Ph.D. graduate study program in the field of space plasma physics. The program includes full funding (20,000 USD stipend plus free tuition), training and education of up to 3 candidates in the fields of space plasma physics, magnetohydrodynamics, and electromagnetism. It focuses on preparation of young scientists for development of comprehensive geophysical models and highly efficient numerical algorithms describing electromagnetic waves and wave-particle interactions in the Earth’s magnetosphere and the ionosphere and utilizing and developing techniques for analyzing single and multi-spacecraft data. Students will apply results from their educational/research projects for interpretation of geophysical data collected by ground stations and satellites in several high-profile NASA and NSF programs, such as Space Weather Forecast, Radiation Belts Remediation and Active Ionospheric Experiments. Currently the Aviation and Aerospace Engineering Program at Embry-Riddle is ranked #1 in the USA by US News, and the Physics Department provides excellent conditions for studying modern geophysics including a high-performance computational facility on campus. For further details about ERAU, Physics Department and our Ph.D. program visit http://www.erau.edu andhttp://daytonabeach.erau.edu/coas/physical-sciences/index.html. For specific questions regarding this program contact Profs. Anatoly V. Streltsov (streltsa@erau.edu) or Katariina Nykyri (nykyrik@erau.edu), Department of Physical Sciences, Embry-Riddle Aeronautical University, 600 S. Clyde Morris Blvd., Daytona Beach, FL 32114, USA.
Dr. Zettergren (ionosphere, polar aurora arc)
(1) Developing and applying algorithms to detect/estimate molecular ion concentrations from ISR spectra. We are currently using the PFISR radar systems to image molecular ions enhancements near auroral arcs and determine their role in creating plasma density cavities often observed in the arc downward current region. Similar data from Sondrestrom ISR are being used in a statistical study of storm-time, MLT dependence of heavy ions in the ionosphere. These data are also being compared to satellite measurements of outflowing molecular ions.
(2) 3D electrostatic modeling of polar cap arc current system effects on plasma density structures and comparison to Resolute bay ISR measurements. Investigation of combined effects of ion heating, convection, arc curvature, and flow field variations in seeding gradient drift instabilities.
(3) Effects of neutral winds, including gravity and acoustic waves, on low-latitude ionospheric densities and field-aligned currents. Direct forcing through ion-neutral drag. Conjugate hemisphere coupling through dynamo electric fields and excitation of field-line resonances through wave steepening. We've produced a new local, coupled neutral atmosphere-ionosphere model for the project which is now ready to be used in a variety of GPS TEC data-model comparisons and parameter-space studies.
(4) 2D electrodynamic simulations of the combined role of impinging Alfven waves, ionospheric feedback, current closure, frictional heating, recombination, and ion upflows in producing depletions and steep density structures which feedback on the wave propagation.
(5) Incoherent scatter radar (ISR) studies of ion upflow/outflow studying time-dependent/hysteresis effects and the role of neutral upwelling in increase upflow efficiency.
(6) Modeling of small-scale field-aligned current systems and comparison against MICA sounding rocket observations. Effects of these currents on thermoelectric heat fluxes, temperature enhancements and ion upflows.
(7) ISR and simulation studies of the role of parametrtic decay instabilities in electron heating and upflow, and changes in
field-aligned resistivity.!
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