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A 1-Joule laser for a 16-fiber injection system
A 1-J laser was designed to launch light down 16, multi-mode fibers (400-{micro}m-core dia.). A diffractive-optic splitter was designed in collaboration with Digital Optics Corporation (DOC), and was delivered by DOC. Using this splitter, the energy injected into each fiber varied <1%. The spatial profile out of each fiber was such that there were no ''hot spots,'' a flyer could successfully be launched and a PETN pellet could be initiated. Preliminary designs of the system were driven by system efficiency where a pristine TEM{sub 00} laser beam would be required. The laser is a master oscillator, power amplifier (MOPA) consisting of a 4-mm-dia. Nd:YLF rod in the stable, q-switched oscillator and a 9.5-mm-dia. Nd:YLF rod in the double-passed amplifier. Using a TEM{sub 00} oscillator beam resulted in excellent transmission efficiencies through the fibers at lower energies but proved to be quite unreliable at higher energies, causing premature fiber damage, flyer plate rupture, stimulated Raman scattering (SRS), and stimulated Brillouin scattering (SBS). Upon further investigation, it was found that both temporal and spatial beam formatting of the laser were required to successfully initiate the PETN. Results from the single-mode experiments, including fiber damage, SRS and SBS losses, will be presented. In …
Date:
April 6, 2004
Creator:
Honig, J.
Object Type:
Article
System:
The UNT Digital Library
9-11 Commission Hearing #1, April 1, 2003, Part 2
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on April 1, 2003 at the Alexander Hamilton U.S. Custom House in New York City. This hearing specifically addresses the topics of borders, money, and transportation; law enforcement, domestic intelligence, and homeland security; and immediate response to the attacks. This section includes testimony from Steven Brill on the subject of law enforcement, domestic intelligence, and homeland security.
Date:
April 1, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #9, April 8, 2004, Part 1
Recording of the ninth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 8, 2004 at the Hart Senate Office Building in Washington, D.C. The Commission heard testimony from Dr. Condoleezza Rice, Assistant to the President for National Security Affairs on the formulation and conduct of U.S. counterterrorism policy.
Date:
April 8, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 13, 2004, Part 1
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 13, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the opening statement by Chairman Kean, in addition to the staff statement on law enforcement, counterterrorism, and intelligence collection in the United States prior to 9/11, and the first panel with testimony from Louis J. Freeh.
Date:
April 13, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 13, 2004, Part 2
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 13, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings.This section includes the second panel of the hearing with testimony from former Attorney General, Janet Reno.
Date:
April 13, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 13, 2004, Part 3
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 13, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on threats and responses in 2001 in addition to the third panel on Summer 2001, with testimony from Thomas J. Pickard and J. Cofer Black.
Date:
April 13, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 13, 2004, Part 4
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 13, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the panel on Summer 2001 with testimony by John Ashcroft, Attorney General of the United States.
Date:
April 13, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 1
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on the performance of the intelligence community in addition to the panel on Summer 2001 with testimony from George J. Tenet.
Date:
April 14, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 2
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the panel on preventing future attacks inside the United States, with testimony from John O. Brennan, Lieutenant General Patrick M. Hughes, John S. Pistole, and James L. Pavitt.
Date:
April 14, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 3
Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on reforming law enforcement, counterterrorism, and intelligence collection in the United States, in addition to the panel on FBI leadership and initiatives post 9/11 with testimony from Robert S. Muller.
Date:
April 14, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
512-S Facility, Actinide Removal Process Radiological Design Summary Report
This report contains top-level requirements for the various areas of radiological protection for workers. Detailed quotations of the requirements for applicable regulatory documents can be found in the Radiological Design Summary Report Implementation Guide. For the purposes of demonstrating compliance with these requirements, per Engineering Standard 01064, ''shall consider / shall evaluate'' indicates that the designer must examine the requirement for the design and either incorporate or provide a technical justification as to why the requirement is not incorporated. This report describes how the Building 512-S, Actinide Removal Process meets the required radiological design criteria and requirements based on 10CFR835, DOE Order 420.1A, WSRC Manual 5Q and various other DOE guides and handbooks. The analyses supporting this Radiological Design Summary Report initially used a source term of 10.6 Ci/gallon of Cs-137 as the basis for bulk shielding calculations. As the project evolved, the source term was reduced to 1.1 Ci/gallon of Cs-137. This latter source term forms the basis for later dose rate evaluations.
Date:
April 21, 2004
Creator:
Nathan, S.J.
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 33, No. 22, Ed. 1 Friday, April 2, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 2, 2004
Creator:
Pound, Jaylynn Christian
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 33, No. 23, Ed. 1 Thursday, April 8, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 8, 2004
Creator:
Pound, Jaylynn Christian
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 33, No. 24, Ed. 1 Friday, April 16, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 16, 2004
Creator:
Pound, Jaylynn Christian
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 33, No. [25], Ed. 1 Friday, April 23, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 23, 2004
Creator:
Rollman, Jon
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 33, No. [26], Ed. 1 Friday, April 30, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 30, 2004
Creator:
Rollman, Jon
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
2002-2003 Engineering Accomplishments: Unconventional Nuclear Weapons Detection
The Defense Threat Reduction Agency, DTRA, is a federal agency charged with safeguarding the nation from weapons of mass destruction, in particular nuclear weapons such as crude devices, and radiological dispersal devices (RDD), also known as dirty bombs. Both of which could be delivered using unconventional means such as by transporting them by a car or boat. Two years ago DTRA partnered with NNSA to evaluate commercially available technologies that could be deployed quickly to defend against threats posed by unconventional nuclear weapons under a program called the Unconventional Nuclear Warfare Defense (UNWD) Program. Lawrence Livermore National Laboratory (LLNL) was one of several National laboratories that participated in this program, which consisted in developing, deploying, and demonstrating detection systems suitable for military base protection. Two key contributions to this program by the LLNL team were the development of two Radiation Detection Buoys (RDB) deployed at Naval Base in Kings Bay in Georgia, and the Detection and Tracking System (DTS) demonstrated at Fort Leonard Wood Missouri, headquarters for the Total Force's Maneuver Support Center (MANSCEN). The RDB's were designed to detect the potential transportation of an unconventional nuclear or radiological weapon by a boat. The RDB's consisted of two commercial marine …
Date:
April 9, 2004
Creator:
Hernandez, Jose E. & Valentine, John
Object Type:
Report
System:
The UNT Digital Library
2003 Chemical Engineering Division annual technical report.
The Chemical Engineering Division is one of six divisions within the Engineering Research Directorate at Argonne National Laboratory, one of the U.S. government's oldest and largest research laboratories. The University of Chicago oversees the laboratory on behalf of the U.S. Department of Energy (DOE). Argonne's mission is to conduct basic scientific research, to operate national scientific facilities, to enhance the nation's energy resources, to promote national security, and to develop better ways to manage environmental problems. Argonne has the further responsibility of strengthening the nation's technology base by developing innovative technology and transferring it to industry. The Division is a diverse early-stage engineering organization, specializing in the treatment of spent nuclear fuel, development of advanced electrochemical power sources, and management of both high- and low-level nuclear wastes. Additionally, the Division operates the Analytical Chemistry Laboratory, which provides a broad range of analytical services to Argonne and other organizations. The Division is multidisciplinary. Its people have formal training in chemistry; physics; materials science; and electrical, mechanical, chemical, and nuclear engineering. They are specialists in electrochemistry, ceramics, metallurgy, catalysis, materials characterization, nuclear magnetic resonance, repository science, and the nuclear fuel cycle. Our staff have experience working in and collaborating with university, industry …
Date:
April 26, 2004
Creator:
Lewis, D.; Graziano, D.; Miller, J. F. & Vandegrift, G.
Object Type:
Report
System:
The UNT Digital Library
2004 DOE Hydrogen, Fuel Cells & Infrastructure Technologies Program Review Presentation COST AND PERFORMANCE ENHANCEMENTS FOR A PEM FUEL CELL TURBOCOMPRESSOR
The objective is to assist the Department of Energy in the development of a low cost, reliable and high performance air compressor/expander. Technical Objective 1: Perform a turbocompressor systems PEM fuel cell trade study to determine the enhanced turbocompressor approach. Technical Objective 2: Using the results from technical objective 1, an enhanced turbocompressor will be fabricated. The design may be modified to match the flow requirements of a selected fuel cell system developer. Technical Objective 3: Design a cost and performance enhanced compact motor and motor controller. Technical Objective 4: Turbocompressor/motor controller development.
Date:
April 1, 2004
Creator:
Gee, Mark K.
Object Type:
Presentation
System:
The UNT Digital Library
2004 Initial Assessments of Closure for the S-SX Tank Farm: Numerical Simulations
In support of CH2M HILL Hanford Group, Inc.'s (CHG) preparation of a Field Investigative Report (FIR) for the closure of the Hanford Site Single-Shell Tank (SST) Waste Management Area (WMA) tank farms, a set of numerical simulations of flow and solute transport was executed to investigate different potential contaminant source scenarios that may pose long-term risks to groundwater from the closure of the S-SX Tank Farm. This report documents the simulation of 7 cases (plus two verification) involving two-dimensional cross sections through the S Tank Farm (Tanks S-101, S102, and S-103) and the simulation of one case involving three-dimensional domain of the S Tank Farm. Using a unit release scenario at Tank S-103, three different types of leaks were simulated. These simulations assessed the effect of leaks during retrieval as well as residual wastes and ancillary equipment after closure. Two transported solutes were considered: uranium-238 (U-238) and technetium-99 (Tc 99). To evaluate the effect of sorption on contaminant transport, six different sorption coefficients were simulated for U 238. Overall, simulations results for the S Tank Farm showed that only a small fraction (< 0.4%) of the U-238 with sorption coefficients 0.6 mL/g migrated from the vadose zone in all …
Date:
April 1, 2004
Creator:
Zhang, Z. F.; Freedman, Vicky L.; Waichler, Scott R. & White, Mark D.
Object Type:
Report
System:
The UNT Digital Library
[2004 State Democratic Convention schedule]
Schedule of events for the 2004 State Democratic Convention.
Date:
April 2004
Creator:
Texas Democratic Party
Object Type:
Text
System:
The UNT Digital Library
3D Computations and Experiments
This project consists of two activities. Task A, Simulations and Measurements, combines all the material model development and associated numerical work with the materials-oriented experimental activities. The goal of this effort is to provide an improved understanding of dynamic material properties and to provide accurate numerical representations of those properties for use in analysis codes. Task B, ALE3D Development, involves general development activities in the ALE3D code with the focus of improving simulation capabilities for problems of mutual interest to DoD and DOE. Emphasis is on problems involving multi-phase flow, blast loading of structures and system safety/vulnerability studies.
Date:
April 5, 2004
Creator:
Couch, R; Faux, D; Goto, D & Nikkel, D
Object Type:
Report
System:
The UNT Digital Library
A 3D Frictional Segment-to-Segment Contact Method for Large Deformations and Quadratic Elements
Node-on-segment contact is the most common form of contact used today but has many deficiencies ranging from potential locking to non-smooth behavior with large sliding. Furthermore, node-on-segment approaches are not at all applicable to higher order discretizations (e.g. quadratic elements). In a previous work, [3, 4] we developed a segment-to-segment contact approach for eight node hexahedral elements based on the mortar method that was applicable to large deformation mechanics. The approach proved extremely robust since it eliminated the over-constraint that caused 'locking' and provided smooth force variations in large sliding. Here, we extend this previous approach to treat frictional contact problems. In addition, the method is extended to 3D quadratic tetrahedrals and hexahedrals. The proposed approach is then applied to several challenging frictional contact problems that demonstrate its effectiveness.
Date:
April 1, 2004
Creator:
Puso, M; Laursen, T & Solberg, J
Object Type:
Article
System:
The UNT Digital Library
661N1 and 661N3 Pre Shot Report
None
Date:
April 13, 2004
Creator:
Bosson, S T
Object Type:
Report
System:
The UNT Digital Library