Charlie Tarrio received a BS from Bates College in Lewiston, ME, with high honors in physics. He received his PhD in physics from the University of Virginia in Charlottesville under the guidance of Steve Schnatterly. He used electron energy-loss spectroscopy to study electronic and optical properties of a diverse set of materials including superconductors and rare-gas solids. He has been at NIST since 1991. His primary interest is in properties of materials under illumination by vacuum ultraviolet radiation. These include optical constants, mirror reflectivities, susceptibility to environmental contamination, and radiation damage. He's developed several new tools and techniques on the Synchrotron Ultraviolet Radiation Facility. Current tools are described in the links below.