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.