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The 0.22 Percent Across-the-Board Cut in FY2001 Appropriations (open access)

The 0.22 Percent Across-the-Board Cut in FY2001 Appropriations

Report describing changes that affected the government budget for the 2001 fiscal year under the Consolidated Appropriations Act.
Date: May 31, 2001
Creator: Keith, Robert
Object Type: Report
System: The UNT Digital Library
1,3-Propanediol Made From Fermentation-Derived Malonic Acid: Office of Industrial Technologies (OIT) Agriculture Project Fact Sheet (open access)

1,3-Propanediol Made From Fermentation-Derived Malonic Acid: Office of Industrial Technologies (OIT) Agriculture Project Fact Sheet

1,3-Propanediol is one of two ingredients used in producing polytrimethylene terephthalate (PTT), a polymer which can be used in polyester and nylon applications. Researchers are developing a process to ferment biomass feedstock to malonic acid using filamentous fungi and then catalytically convert malonic acid to 1,3-propanediol.
Date: September 12, 2001
Creator: Carde, T.
Object Type: Book
System: The UNT Digital Library

AS 01-7

None
Date: 2001
Creator: Falsetta, Vincent
Object Type: Artwork
System: The UNT Digital Library
1-10 Mbar Laser-Driven Shocks Using the Janus Laser Facility (open access)

1-10 Mbar Laser-Driven Shocks Using the Janus Laser Facility

We report preliminary results using the Lawrence Livermore National Laboratory (LLNL) Janus laser facility to generate high pressure laser-driven shocks in the 1-10 Mbar regime. These experiments address various issues, including shock steadiness, planarity, uniformity and low target preheat, important for making precision EOS measurements on a small (E < 250 J) laser facility. A brief description of the experimental techniques, target design and measurements will be given.
Date: August 10, 2001
Creator: Dunn, J.; Price, D. F.; Moon, S. J.; Cauble, R. C.; Springer, P. T. & Ng, A.
Object Type: Article
System: The UNT Digital Library

AZ 01-14

This abstract painting is predominately white with green, pink and gray vertical strokes broken by an implied horizontal line.
Date: 2001
Creator: Falsetta, Vincent
Object Type: Artwork
System: The UNT Digital Library
A 1 MEGAWATT POLYPHASE BOOST CONVERTER-MODULATOR FOR KLYSTRON PULSE APPLICATION (open access)

A 1 MEGAWATT POLYPHASE BOOST CONVERTER-MODULATOR FOR KLYSTRON PULSE APPLICATION

This paper describes electrical design criteria and first operational results a 140 kV, 1 MW average, 11 MW peak, zero-voltage-switching 20 kHz polyphase bridge, boost converter/modulator for klystron pulse application. The DC-DC converter derives the buss voltages from a standard 13.8 kV to 2300 Y substation cast-core transformer. Energy storage and filtering is provided by self-clearing metallized hazy polypropylene traction capacitors. Three ''H-Bridge'' Insulated Gate Bipolar Transistor (IGBT) switching networks are used to generate the polyphase 20 kHz transformer primary drive waveforms. The 20 kHz drive waveforms are chirped the appropriate duration to generate the desired klystron pulse width. PWM (pulse width modulation) of the individual 20 kHz pulses is utilized to provide regulated output waveforms with adaptive feedforward and feedback techniques. The boost transformer design utilizes amorphous nanocrystalline material that provides the required low core loss at design flux levels and switching frequencies. Resonant shunt-peaking is used on the transformer secondary to boost output voltage and resonate transformer leakage inductance. With the appropriate transformer leakage inductance and peaking capacitance, zero-voltage-switching of the IGBT's is attained, minimizing switching losses. A review of these design parameters and the first results of the performance characteristics will be presented.
Date: June 1, 2001
Creator: Reass, W. A.; Doss, J. D. & Gribble, R. F.
Object Type: Article
System: The UNT Digital Library
The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position' (open access)

The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position'

None
Date: October 31, 2001
Creator: Cobessi, D.; Huang, L.-S.; Ban, M.; Pon, N. G.; Daldal, F. & Berry, E. A.
Object Type: Article
System: The UNT Digital Library
2-D Simulations of Drainage Winds and Diffusion Compared to Observations (open access)

2-D Simulations of Drainage Winds and Diffusion Compared to Observations

A vertically integrated dynamical drainage flow model is developed from conservation equations for momentum and mass in a terrain-following coordinate system. Wind fields from the dynamical model drive a Monte Carlo transport and diffusion model. The model needs only topographic data, an Eulerian or Lagrangian time scale and a surface drag coefficient for input data, and can be started with a motionless atmosphere. Model wind and diffusion predictions are compared to observations from the rugged Geysers CA area. Model winds generally agree with observed surface winds, and in some cases may give better estimates of area-averaged flow than point observations. Tracer gas concentration contours agree qualitatively with observed contours, and point predictions of maximum concentrations were correctly predicted to within factors of 2 to 10. Standard statistical tests of model skill showed that the accuracy of the predictions varied significantly from canyon to canyon in the Geysers are a. Model wind predictions are also compared to observations from the Savannah River Plant of SC which has gently rolling terrain. The model correctly simulated the slower development of drainage winds and slower deepening of the drainage layer in the Savannah River Valley, relative to the Geysers CA simulations. The SC simulations …
Date: May 29, 2001
Creator: Garrett, A. J.
Object Type: Article
System: The UNT Digital Library
3-D Experimental Fracture Analysis at High Temperature (open access)

3-D Experimental Fracture Analysis at High Temperature

T*e, which is an elastic-plastic fracture parameter based on incremental theory of plasticity, was determined numerically and experimentally. The T*e integral of a tunneling crack in 2024-T3 aluminum, three point bend specimen was obtained through a hybrid analysis of moire interferometry and 3-D elastic-plastic finite element analysis. The results were verified by the good agreement between the experimentally and numerically determined T*e on the specimen surface.
Date: September 14, 2001
Creator: Jackson, John H. & Kobayashi, Albert S.
Object Type: Report
System: The UNT Digital Library
3(omega) Damage: Growth Mitigation (open access)

3(omega) Damage: Growth Mitigation

The design of high power UV laser systems is limited to a large extent by the laser-initiated damage performance of transmissive fused silica optical components. The 3{omega} (i.e., the third harmonic of the primary laser frequency) damage growth mitigation LDRD effort focused on understanding and reducing the rapid growth of laser-initiated surface damage on fused silica optics. Laser-initiated damage can be discussed in terms of two key issues: damage initiated at some type of precursor and rapid damage growth of the damage due to subsequent laser pulses. The objective of the LDRD effort has been the elucidation of laser-induced damage processes in order to quantify and potentially reduce the risk of damage to fused silica surfaces. The emphasis of the first two years of this effort was the characterization and reduction of damage initiation. In spite of significant reductions in the density of damage sites on polished surfaces, statistically some amount of damage initiation should always be expected. The early effort therefore emphasized the development of testing techniques that quantified the statistical nature of damage initiation on optical surfaces. This work led to the development of an optics lifetime modeling strategy that has been adopted by the NIF project to …
Date: February 22, 2001
Creator: Kozlowski, M; Demos, S; Wu, Z-L; Wong, J; Penetrante, B & Hrubesh, L
Object Type: Report
System: The UNT Digital Library
3(omega) Power Balance Procedure on the NIF (open access)

3(omega) Power Balance Procedure on the NIF

This document defines the detailed NIF full system shot procedure to obtain 8% power balance as specified by the SDR002 3.2.1.04. Because the 48 quads of the NIF will be set up over a period of five years, obtaining power balance will naturally be accomplished in two steps. First, as each quad is brought online, the four laser beams within each quad will be tuned by setting the PABTS splitter ratios so that each beam will give the same laser power on target during low energy square pulse shots. During the quad activation period all of the technical tools and procedures will be developed that are needed for attaining full laser power balance. After the initial settings of the 48 PABTS, if no other tuning is done the overall NIF power balance is expected to be about <15%. In the second step, an iteration procedure with approximately 18 full laser system shots will be needed to obtain 8% power balance by tuning out the remaining systematic differences among the quads to an acceptable small difference of 2% rms (at 3{omega}). This rms difference is smaller than the expected variation of the injection energy or the amplifier gain, and is also …
Date: January 22, 2001
Creator: Glenzer, S.; Jones, O.; Speck, D. R.; Munro, D.; Lerche, R.; Salmon, T. et al.
Object Type: Report
System: The UNT Digital Library
A 3-year plan for beam science in the heavy-ion fusion virtual national laboratory (open access)

A 3-year plan for beam science in the heavy-ion fusion virtual national laboratory

In December 1998, LBNL Director Charles Shank and LLNL Director Bruce Tarter signed a Memorandum of Agreement to create the Heavy-Ion Fusion Virtual National Laboratory (HIF-VNL) with the purpose of improving the efficiency and productivity of heavy ion research through coordination of the two laboratories' efforts under one technical director. In 1999, PPPL Director Robert Goldston signed the VNL MOA for PPPL's heavy-ion fusion group to join the VNL. LBNL and LLNL each contribute about 45% of the $10.6 M/yr trilab VNL effort, and PPPL contributes currently about 10% of the VNL effort. The three labs carry out collaborative experiments, theory and simulations of a variety of intense beam scientific issues described below. The tri-lab HIF VNL program is part of the DOE Office of Fusion Energy Sciences (OFES) fusion program. A short description of the four major tasks areas of HIF-VNL research is given in the next section. The task areas are: High Current Experiment, Final Focus/Chamber Transport, Source/Injector/Low Energy Beam Transport (LEBT), and Theory/Simulation. As a result of the internal review, more detailed reviews of the designs, costs and schedules for some of the tasks have been completed, which will provide more precision in the scheduled completion dates …
Date: September 10, 2001
Creator: Logan, B. Grant
Object Type: Report
System: The UNT Digital Library
10 (micro)m and 5 (micro)m Pinhole-Assisted Point-Projection Backlit Imaging for NIF (open access)

10 (micro)m and 5 (micro)m Pinhole-Assisted Point-Projection Backlit Imaging for NIF

Pinhole-assisted point-projection backlighting with 10{micro}m and 5 {micro}m pinholes placed a small distance of order 1 mm away from the backlighter produces images with large field of view and high resolution. Pinholes placed closely to high-power backlighter sources can vaporize and close due to x-ray driven ablation, thereby limiting the usefulness of this method. A study of streaked 1-D backlit imaging of 25 {micro}m W wires using the OMEGA laser is presented. The pinhole closure timescale for 10 {micro}m pinholes placed 0.45 mm and 1 mm distant from the backlighter is 1.3 ns and 2.2 ns, respectively. Similar timescales for 5 {micro}m pinholes is also presented. Successful wire imaging prior to pinhole closure is clearly demonstrated.
Date: June 5, 2001
Creator: Bullock, A. B.; Landen, O. L. & Bradley, D. K.
Object Type: Article
System: The UNT Digital Library
N-15 SIGNALS OF NITROGEN SOURCE AND FATE IN A SEMI-ARID WETLANDS (open access)

N-15 SIGNALS OF NITROGEN SOURCE AND FATE IN A SEMI-ARID WETLANDS

None
Date: August 1, 2001
Creator: Heikoop, J. M. & Hickmott, D. D.
Object Type: Article
System: The UNT Digital Library
[24-Hour Film Feast, 1 of 3] captions transcript

[24-Hour Film Feast, 1 of 3]

Video recording from The Black Academy of Arts and Letters recorded during their 24-Hour Film Festival held on November 16th, 2001. The BetaCam footage shows interviews and an audience dialogue with black actors and directors.
Date: November 16, 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
[24-Hour Film Feast, 3 if 3] captions transcript

[24-Hour Film Feast, 3 if 3]

Video recording from The Black Academy of Arts and Letters recorded during their 24-Hour Film Festival held on November 16th, 2001. The BetaCam footage shows interviews and an audience dialogue with black actors and directors.
Date: November 16, 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
[24-Hour Film Feast: Cicely Tyson / Antonio Fargas, tape 3 of 3] captions transcript

[24-Hour Film Feast: Cicely Tyson / Antonio Fargas, tape 3 of 3]

Video footage from The Black Academy of Arts and Letters recorded during their 24-Hour Film Feast of 2001 featuring Cicely Tyson and Antonio Fargas. The VHS footage shows Fargas holding a dialogue and speaking to an audience at the Clarence Muse Café Theatre on November 16th, 2001.
Date: November 16, 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
[24-Hour Film Feast: Ernest Harden Jr and Cicely Tyson, tape 2 of 3] captions transcript

[24-Hour Film Feast: Ernest Harden Jr and Cicely Tyson, tape 2 of 3]

Video footage from The Black Academy of Arts and Letters recorded during their 24-Hour Film Feast of 2001 featuring Ernest Harden Jr. and Cicely Tyson . The VHS footage shows both individuals holding a dialogue and speaking to an audience at the Clarence Muse Café Theatre on November 16th, 2001. Ernest leaves the stage around the 37:00 minute mark where he is then followed by Cicely Tyson who speaks until end of the tape.
Date: November 16, 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
[24-Hour Film Feast: Roger Mosley and Juanita Moore, tape 1 of 3] captions transcript

[24-Hour Film Feast: Roger Mosley and Juanita Moore, tape 1 of 3]

Video footage from The Black Academy of Arts and Letters recorded during their 24-Hour Film Feast of 2001 featuring Roger Mosley and Juanita Moore. The VHS footage shows both individuals holding a dialogue and speaking to an audience at the Clarence Muse Café Theatre on November 16th, 2001. Actor Roger Mosley speaks first until the 43:30 minute mark followed by Juanita Moore beginning at the 49:00 minute mark.
Date: November 16, 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
[24-hour FilmFEAST Promo] captions transcript

[24-hour FilmFEAST Promo]

Video recording from The Black Academy of Arts and Letters recorded during their 24-hour FilmFEAST Promo in 2001. This video features various actors giving speeches to an audience about their films. This video was to promote further 24-hour FilmFeast events. Some of the actors featured are Ernest Harden, Jr. and Cicely Tyson.
Date: 2001
Creator: unknown
Object Type: Video
System: The UNT Digital Library
25 Can Verification Report for the LLNL Plutonium Packaging System (PuPS) (open access)

25 Can Verification Report for the LLNL Plutonium Packaging System (PuPS)

This document reports the results of the 25 Can Verification Run. The 25 Can Verification Run was performed as outlined in Section 1.d of SRS Acceptance Criteria (Reference 1). The run was performed over the period of February 16 to the 28, 2001. Each of these cans was welded with a dummy Inner Can containing about 5 kg of surrogate material. The cans were then analyzed using radiography and metallography of samples taken at four locations of the weld. The radiographs were examined for porosity. The micrographs of the metallurgical samples were examined for porosity, cracks, and lack of fusion. The results were reviewed by Derrill Rikard (a level 3 inspector at LLNL) and by Ken Durland (a level 3 inspector from WSRC). These reviews did not find anything of concern. Therefore we are submitting these results to SRS for concurrence.
Date: May 7, 2001
Creator: Riley, D C & Dodson, K E
Object Type: Report
System: The UNT Digital Library
30 years of high-intensity negative ion sources for accelerators (open access)

30 years of high-intensity negative ion sources for accelerators

Thirty years ago, July 1, 1971, significant enhancement of negative ion emission from a gas discharge following an admixture of cesium was observed for the first time. This observation became the basis for the development of Surface Plasma Sources (SPS) for efficient production of negative ions from the interaction of plasma particles with electrodes on which adsorbed cesium reduced the surface work-function. The emission current density of negative ions increased rapidly from j {approximately} 10 mA/cm{sup 2} to 3.7 A/cm{sup 2} with a flat cathode and up to 8 A/cm{sup 2} with an optimized geometrical focusing in the long pulse SPS, and to 0.3 A/cm{sup 2} for DC SPS, recently increased up to 0.7 A/cm{sup 2}. Discovery of charge-exchange cooling helped decrease the negative ion temperature T below 1 eV, and increase brightness by many orders to a level compatible with the best proton sources, B = j/T> 1 A/cm{sup 2} eV. The combination of the SPS with charge-exchange injection improved large accelerators operation and has permitted beam accumulation up to space-charge limit and overcome this limit several times. The early SPS for accelerators have been in operation without modification for {approximately} 25 years. Advanced version of the SPS for …
Date: July 25, 2001
Creator: Dudnikov, Vadim
Object Type: Article
System: The UNT Digital Library
[44-W-9 Reunion Gathering] (open access)

[44-W-9 Reunion Gathering]

Flyer sent out to WASP members from class 44-W-9 advertising a group gathering in Las Vegas with information on the hotel and shuttle prices and a tentative schedule of events.
Date: 2001
Creator: Women Airforce Service Pilots (U.S.)
Object Type: Pamphlet
System: The Portal to Texas History
62-TeV center of mass hadron collider with capability for super bunch beams (open access)

62-TeV center of mass hadron collider with capability for super bunch beams

A 60 TeV center of mass hadron collider is proposed, which has capability of using Superbunch beam. With Superbunch beam, the luminosity is expected to be increased by a factor of 20, compared with conventional acceleration using RF cavities. This hadron collider will be built in two stages with a low field magnet ring first and a high field magnet ring later in the same tunnel. The low field magnet rig will be built with Pipetron scheme, with 7 TeV and 7 TeV proton beams, making a 14 TeV center of mass energy high luminosity collider, using Superbunch beams. In the second stage 10 Tesla high field magnets with twin beams, will be installed. It also utilizes Superbunch beams, realizing high luminosity collider. To accelerate Superbunch beams, the barrier bucket and acceleration induction cells will be used, which are made of induction cells, utilizing FINEMET material. The core loss of the FINEMET is estimated for the whole collider is estimated. The synchrotron radiation of the collider is also estimated. Merits of Superbunch beams over RF bunched beams for the high energy experiments is described.
Date: August 22, 2001
Creator: Takayama, Ryuji Yamada and Ken
Object Type: Article
System: The UNT Digital Library