Gwyn P. Williams, Jefferson Laboratory
Resources in the Free-electron Laser Laboratory at the Jefferson Laboratory include
- Superconducting-linac based THz to IR source of unprecedented average power and brightness.
- Broadband THz source in the 0.1 - 3 THz spectral range, and with an average power of 10 Watts, all fully spatially coherent.
- Michelson interferometer
- Liquid helium cooled bolometer
- Vacuum chambers
With high brilliance, focusing capabilities, temporal resolution, coherence, and polarization, synchrotron x-radiation is a particularly powerful probe for revealing rich materials behavior under extreme environments. Besides the traditional crystal structure information, recently developed synchrotron techniques provide information on phonon dynamics, electronic and bonding structure, magnetism, micro-structure in a large length scale, nano-imaging, strength and elasticity, and kinetics/process evolution.
Many low-Z elements, both alone and in combination, exhibit novel states of matter under high pressure with important energy implications. Their properties include extraordinary high-energy densities, enhanced mechanical properties, and novel-phase behavior. These elements exhibit strong, covalent network bonding in their elemental states, and their compounds retain a significant degree of this covalency as well, despite a formal ionic nature in some cases.
- Sci. Thrust Areas: Novel Molecular & Covalent Materials
- Technology Task Force Teams: Novel Materials Synthesis
- Laboratory or Institution: Cornell University, Jefferson Laboratory, University of Texas, Austin
- Personnel: Alex Goncharov
- Key Partners: Neil W. Ashcroft, Cornell University, Roald Hoffmann, Cornell University, Jung-Fu "Afu" Lin, University of Texas, Austin
- National Laboratory Partners: Gwyn P. Williams, Jefferson Laboratory