FY05 LDRD Final ReportTime-Resolved Dynamic Studies using Short Pulse X-Ray Radiation (open access)

FY05 LDRD Final ReportTime-Resolved Dynamic Studies using Short Pulse X-Ray Radiation

Established techniques must be extended down to the ps and sub-ps time domain to directly probe product states of materials under extreme conditions. We used short pulse ({le} 1 ps) x-ray radiation to track changes in the physical properties in tandem with measurements of the atomic and electronic structure of materials undergoing fast laser excitation and shock-related phenomena. The sources included those already available at LLNL, including the picosecond X-ray laser as well as the ALS Femtosecond Phenomena beamline and the SSRL based sub-picosecond photon source (SPPS). These allow the temporal resolution to be improved by 2 orders of magnitude over the current state-of-the-art, which is {approx} 100 ps. Thus, we observed the manifestations of dynamical processes with unprecedented time resolution. Time-resolved x-ray photoemission spectroscopy and x-ray scattering were used to study phase changes in materials with sub-picosecond time resolution. These experiments coupled to multiscale modeling allow us to explore the physics of materials in high laser fields and extreme non-equilibrium states of matter. The ability to characterize the physical and electronic structure of materials under extreme conditions together with state-of-the-art models and computational facilities will catapult LLNL's core competencies into the scientific world arena as well as support its …
Date: February 10, 2006
Creator: Nelson, A; Dunn, J; van Buuren, T; Budil, K; Sadigh, B; Gilmer, G et al.
System: The UNT Digital Library
Contracts Reported by Texas State Agencies and Institutions of Higher Education: 2005 (open access)

Contracts Reported by Texas State Agencies and Institutions of Higher Education: 2005

Summary of contracts reported to the Legislative Budget Board (LBB) by Texas state agencies and institutions of higher learning during fiscal year 2005. Reports include "information regarding professional services, construction or consulting contract that totals $14,000 or more, or a major information systems contract that totals $100,000 or more. The requirement also covers any amendments, modifications, renewals, and extensions for specified contracts" (p. vii).
Date: March 2006
Creator: Texas. Legislative Budget Board.
System: The Portal to Texas History
FY 2005 Annual Progress Report for the DOE Hydrogen Program (open access)

FY 2005 Annual Progress Report for the DOE Hydrogen Program

In cooperation with industry, academia, national laboratories, and other government agencies, the Department of Energy's Hydrogen Program is advancing the state of hydrogen and fuel cell technologies in support of the President's Hydrogen Fuel Initiative. The initiative seeks to develop hydrogen, fuel cell, and infrastructure technologies needed to make it practical and cost-effective for Americans to choose to use fuel cell vehicles by 2020. Significant progress was made in fiscal year 2005 toward that goal.
Date: October 1, 2005
Creator: unknown
System: The UNT Digital Library