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in creator/contributor: "Warrick, A."  
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Processing of polarametric SAR images. Final report

Description: The objective of this work was to develop a systematic method of combining multifrequency polarized SAR images. It is shown that the traditional methods of correlation, hard targets, and template matching fail to produce acceptable results. Hence, a new algorithm was developed and tested. The new approach combines the three traditional methods and an interpolation method. An example is shown that demonstrates the new algorithms performance. The results are summarized suggestions for future rese… more
Date: September 1, 1995
Creator: Warrick, A. L. & Delaney, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of buried mine-like target radar signatures using wideband electromagnetic modeling

Description: Current ground penetrating radars (GPR) have been tested for land mine detection, but they have generally been costly and have poor performance. Comprehensive modeling and experimentation must be done to predict the electromagnetic (EM) signatures of mines to access the effect of clutter on the EM signature of the mine, and to understand the merit and limitations of using radar for various mine detection scenarios. This modeling can provide a basis for advanced radar design and detection techni… more
Date: April 6, 1998
Creator: Warrick, A. L.; Azevedo, S. G. & Mast, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Field testing plan for unsaturated zone monitoring and field studies

Description: The University of Arizona, in cooperation with the Bureau of Economic Geology at The University of Texas at Austin, and Stephens and Associates in Albuquerque, New Mexico has developed a field testing plan for evaluating subsurface monitoring systems. The U.S. Nuclear Regulatory Commission has requested development of these testing plans for low-level radioactive waste disposal sites (LLW) and for monitoring at decommissioned facilities designated under the {open_quotes}Site Decommissioning Man… more
Date: October 1, 1996
Creator: Young, M. H.; Wierenga, P. J. & Warrick, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Controlled Field Study for Validation of Vadose Zone Transport Models

Description: Prediction of radionuclide migration through soil and groundwater requires models which have been tested under a variety of conditions. Unfortunately, many of the existing models have not been tested in the field, partly because such testing requires accurate and representative data. This report provides the design of a large scale field experiment representative, in terms of,surface area and depth of vadose zone, of an actual disposal area. Experiments are proposed which will yield documented … more
Date: August 1, 1994
Creator: Wierenga, P. J.; Warrick, A. W.; Yeh, T. C. & Hills, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Management Of Experiments And Data At The National Ignition Facility

Description: Experiments, or 'shots', conducted at the National Ignition Facility (NIF) are discrete events that occur over a very short time frame (tens of nanoseconds) separated by many hours. Each shot is part of a larger campaign of shots to advance scientific understanding in high-energy-density physics. In one campaign, scientists use energy from the 192-beam, 1.8-Megajoule pulsed laser in the NIF system to symmetrically implode a hydrogen-filled target, thereby creating conditions similar to the inte… more
Date: March 18, 2011
Creator: Azevedo, S; Casey, A; Beeler, R; Bettenhausen, R.; Bond, E.; Chandrasekaran, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Extreme Ultraviolet Lithography - Reflective Mask Technology

Description: EUVL mask blanks consist of a distributed Bragg reflector made of 6.7nm-pitch bi-layers of MO and Si deposited upon a precision Si or glass substrate. The layer deposition process has been optimized for low defects, by application of a vendor-supplied but highly modified ion-beam sputter deposition system. This system is fully automated using SMIF technology to obtain the lowest possible environmental- and handling-added defect levels. Originally designed to coat 150mm substrates, it was upgrad… more
Date: May 9, 2000
Creator: Walton, C. C.; Kearney, P. A.; Mirkarimi, P. B.; Bowers, J. M.; Cerjan, C.; Warrick, A. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser Coupling to Reduced-Scale Targets at the Early Light Program of the National Ignition Facility

Description: A platform for analysis of material properties under extreme conditions, where a sample is bathed in radiation with a high temperature, is under development. This hot environment is produced with a laser by depositing maximum energy into a small, high-Z can. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility, under construction at the University of California Lawrence Livermore National Laboratory. These target… more
Date: November 18, 2004
Creator: Hinkel, D. E.; Schneider, M. B.; Baldis, H. A.; Bower, D.; Campbell, K. M.; Celeste, J. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser coupling to reduced-scale targets at NIF Early Light

Description: Deposition of maximum laser energy into a small, high-Z enclosure in a short laser pulse creates a hot environment. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technology 26, 755 (1994)], under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temp… more
Date: August 31, 2005
Creator: Hinkel, D. E.; Schneider, M. B.; Young, B. K.; Holder, J. P.; Langdon, A. B.; Baldis, H. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The First Experiments on the National Ignition Facility

Description: A first set of laser-plasma interaction, hohlraum energetics and hydrodynamic experiments have been performed using the first 4 beams of the National Ignition Facility (NIF), in support of indirect drive Inertial Confinement Fusion (ICF) and High Energy Density Physics (HEDP). In parallel, a robust set of optical and x-ray spectrometers, interferometer, calorimeters and imagers have been activated. The experiments have been undertaken with laser powers and energies of up to 8 TW and 17 kJ in fl… more
Date: November 11, 2005
Creator: Landen, O. L.; Glenzer, S.; Froula, D.; Dewald, E.; Suter, L. J.; Schneider, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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