Bill R. Appleton is associate director for the Advanced Neutron Source at ORNL. Previously, he was ORNL associate director for Physical Sciences and Advanced Materials. From 1986 to 1988 he was director of the Laboratory's Solid State Division. In this division, he also served as group leader, section head, and director of the Surface Modification and Characterization Collaborative Research Center. He received a B.S. degree from the University of Missouri and M.S. and Ph.D. degrees from Rutgers University in solid-state physics. He then worked two years at Bell Laboratories in Murray Hill, New Jersey, in ion implantation and ion-beam analysis before joining ORNL in 1967.

In 1987 Appleton was named Scientist of the Year by Martin Marietta Energy Systems, Inc. He is a recipient of the 1980 Department of Energy Award for Outstanding Sustained Research, an I_R 100 Award for his work in developing supersaturated substitutional semiconductor alloys, and the 1985 DOE Materials Research Award for Significant New Technologies. He has co-edited three books and is a member of editorial boards of several scientific journals. He is a past officer and councillor of the Materials Research Society and a fellow and councillor of the American Physical Society.

Colin D. West is director of the Advanced Neutron Source Project at ORNL. He received his BSc., MSc., and Ph.D. degrees in physics from the University of Liverpool in England. From 1965 to 1977, he worked for the United Kingdom Atomic Energy Research Establishment at Harwell, England. He came to ORNL in 1977 to work for the Program Planning and Analysis Office (now the Office of Planning and Management), which reports to the Laboratory director. West transferred to the Engineering Technology Division in 1981. In 1975 he was jointly awarded the Science, Education and Management Premium by the Institute of Electrical Engineers, and in 1992 he was honored at the Martin Marietta Energy Systems Annual Awards Night Ceremony for his exceptional service as ANS director. During his career at ORNL since 1977, he has been responsible for development of a novel neutron detector, materials irradiation experiments, and several reactor safety projects. He has worked extensively on development of Stirling engines at Harwell and ORNL, publishing more than 50 books, papers, reports, and patents in that field.

West helped to found the International Group on Research Reactors of which he is chairman. It provides a forum for organizations around the world to share information and research results concerning new research reactor construction and upgrade projects. Currently, groups from 21 countries participate in this organization. He is an editor of the Journal of Neutron Research, a new international publication. He is also president of the East Tennessee Stock Dog Association and drives a homemade car.

The authors acknowledge the contributions to this article by Jon Jefferson, Wayne Scarbrough, and Carolyn Krause.

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Neutron Scattering at the High Flux Isotope Reactor