About the Editors Robert J. Barker is the program manager for plasma physics at the US Air Force Office of Scientific Research (AFOSR) in Arlington, VA. His prior career as a computational plasma physicist took him from the US Naval Research Laboratory, Washington, DC, to the Mission Research Corporation, Washington, DC, where he worked on improvements to and applications of both the 2D Magic and 3D SOS plasma simulation codes. His current interests include microwave/millimeter-wave generation, pulsed power, medical/biological effects, electromagnetic/electrothermal launchers, air plasmas, charged particle beam generation & propagation, explosive power generation, and computational physics. Dr. Barker serves as a colonel in the US Air Force Reserves, assigned to the Directed Energy Directorate of the US Air Force Research Laboratory, Albuquerque, NM. In 1998 he was elected a Fellow of the Air Force Research Laboratory, Dr. Barker is a Fellow of the IEEE and a member of the American Physical Society. Edl Schamiloglu is the Gardner-Zemke Professor of Electrical and Computer Engineering at the University of New Mexico, Albuquerque, where he also directs the Pulsed Power and Plasma Science Laboratory. He performs extensive work in the physics and technology of charged particle beam generation and propagation, high-power narrow band and ultra-wideband microwave sources, plasma physics and diagnostics, and electromagnetic wave propagation. Dr. Schamiloglu is the associate editor of the IEEE Transactions on Plasma Science. He is a senior member of the IEEE and an elected member of the IEEE Nuclear and Plasma Sciences Society?s Administrative Committee (NPSS AdCom). Also, in 1991 Dr. Schamiloglu was a member of the Delphi/Minerva team that received the Sandia National Laboratories Research Excellence Award. Furthermore, he received the 1992 School of Engineering Research Excellence Award, and was recently awarded the title of Regents? Lecturer (1996?1999).