1. Bradley Department of Electrical and Computer Engineering, Virginia Tech, 1185 Perry St., Blacksburg, Virginia 24061, USA
2. Plasma Physics Division, NRL, 4555 Overlook Ave., Washington DC 20375, USA
3. NRC Postdoc Fellow, Plasma Physics Division, NRL, 4555 Overlook Ave., Washington DC 20375, USA
4. Information Technology Division, NRL, 4555 Overlook Ave., Washington DC 20375, USA
5. NorthWest Research Associates, 4118 148th Ave NE, Redmond, Washington 98052-5164, USA