the processes that drive both steady and dynamic solar wind. His previous experience includes participating in the instrument development and flight operations of the Spartan 201 space shuttle experiment. Dr. Strachan was a member of the NASA Solar and Heliospheric Management and Operations Working Group (2001-2004) and the NASA Sun-Solar System Connection Roadmap Foundation Committee (2004-2005). He serves on the NRC Committee on Solar and Space Physics.
LAWRENCE W. TOWNSEND is a professor in the Department of Nuclear Engineering, University of Tennessee. Between 1970 and 1977 he served in the U.S. Navy as a nuclear submarine engineering officer. From 1981 until 1995 he held positions as research scientist and senior research scientist at NASA Langley Research Center. While at NASA, Dr. Townsend received numerous scientific awards, including NASA’s highest research honor—a NASA Exceptional Scientific Achievement Medal for outstanding contributions to the understanding of nuclear interactions of cosmic radiation with matter and its implications for space radiation exposure and shielding. He is a council member of the National Council on Radiation Protection and Measurements. His research interests include space radiation transport code development, space radiation shielding, theoretical modeling of secondary neutron production cross sections and spectra from energetic proton and heavy-ion interactions with thin and thick targets, modeling production of radioactive and stable heavy nuclides from nuclear spallation, and design of neutron sources, including cold sources, for use in radiography, radiotherapy, neutron activation analysis, and materials studies. He is the principal investigator and leader of the multi-institutional, NASA-funded, Space Radiation Transport Code Development Consortium. Dr. Townsend received a Ph.D. in theoretical nuclear physics from the University of Idaho in 1980, an M.S. in physics from the U.S. Naval Postgraduate School in 1970, and a B.S. in physics from the U.S. Naval Academy in 1969.
RONALD E. TURNER is a principal scientist at ANSER Corporation. Dr. Turner has more than 20 years of experience in space systems analysis, space physics, orbital mechanics, remote sensing, and nuclear and particle physics. He also has extensive experience in radiation effects on humans in space. His recent research as participating scientist on the Mars Odyssey mission has included risk management strategies for solar particle events during human missions to the Moon or Mars. He has been an invited participant at NASA workshops looking at space radiation/biology missions, life science mission requirements for several Mars initiatives, and the impact of solar particle events on the design of human missions. Dr. Turner served on the NRC Safe on Mars study in 2002. He is the senior science adviser to the NASA Institute for Advanced Concepts, an independent institute charged with creating a vision of future space opportunities to lead NASA into the 21st century. Dr. Turner received a Ph.D. in physics from Ohio State University in 1984, an M.S. in physics from the University of Florida in 1978, and a B.S. in physics from the University of Florida in 1977. He was chair of the Aeronautics and Space Engineering Board’s Human Health and Support Systems Panel reviewing the NASA capabilities roadmap, and he has been nominated to serve on the NRC Committee on Space and Solar Physics.
THOMAS H. ZURBUCHEN is an associate professor of space science and engineering in the Department of Atmospheric, Oceanic, and Space Sciences at the University of Michigan, where he led the design, manufacturing, and testing of a low-weight time-of-flight mass spectrometer, the Fast Imaging Plasma Spectrometer, part of the spacecraft MESSENGER payload flying to Mercury. Dr. Zurbuchen’s research interests include instruments to measure the composition of plasmas in the heliosphere, new particle detectors technologies suitable for future space missions, theoretical models for all major phenomena in the solar atmosphere and its expansion into the heliosphere as the solar wind, theoretical concepts and models for interstellar heliospheric neutral gas and dust behavior and subsequent ionization to form