Stan Humphries spent the first part of his career as an experimentalist in the fields of plasma physics, controlled fusion and charged particle acceleration. A notable contribution was the creation and demonstration of methods to generate and to transport intense pulsed ion beams. His current work centers on simulations of electromagnetic fields, charged-particle beams and X-ray/electron interactions with matter. Dr. Humphries is the author of over 150 journal publications and the textbooks Principles of Charged-particle Acceleration (John Wiley, New York, 1986), Charged Particle Beams (John Wiley, New York, 1990) and Field Solutions on Computers (CRC Press, Boca Raton, 1997). He received a B.S. in Physics from the Massachusetts Institute of Technology and a Ph.D. in Nuclear Engineering from the University of California at Berkeley. He was elected a Fellow of the American Physical Society and the Institute of Electrical and Electronic Engineers. Dr. Humphries is a professor emeritus in the Department of Electrical and Computer Engineering at the University of New Mexico and Managing Member of Field Precision LLC, an engineering software company. His photographs are on on exhibit at Southwest-Gallery.com.