1. Department of Physics, William & Mary, Williamsburg, VA, USA
2. Department of Electrical & Computer Engineering, Old Dominion University, Norfolk, VA, USA
3. Plasma Science and Fusion Center, MIT, Cambridge, MA, USA
4. Department of Mathematics and Physical Sciences, Rogers State University, Claremore, OK, USA
5. School of Electrical and Computer Engineering, National Technical University of Athens, Zographou, Greece