Serial/Series Title
Fiscal Year 1997
2
Fiscal Year 2003
2
Fiscal Year 2012
2
Irradiation Processing Department Monthly Record Report
2
Winter Fuels Report
2
ARM Facilities Newsletter
1
Active Cathodes for Super-High Power Density Solid Oxide Fuel Cells Through Space Charge Effects Quarterly Report
1
Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipline Leak Detection Progress Report
1
Annual Illness and Injury Surveillance Report
1
Electric Power Monthly
1
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3,495 Matching Results
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Advanced pulse-shape analysis and implementation of gamma-ray tracking in a position-sensitive coaxial HPGe detector
None
Date:
November 12, 2002
Creator:
Kuhn, Austin L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Advanced Reactors Transition Program Resource Loaded Schedule
The Advanced Reactors Transition (ART) Resource Loaded Schedule (RLS) provides a cost and schedule baseline for managing the project elements within the ART Program. The Fast Flux Test Facility (FETF) activities are delineated through the end of FY 2000, assuming continued standby. The Nuclear Energy (NE) Legacies and Plutonium Recycle Test Reactor (PRTR) activities are delineated through the end of the deactivation process. This revision reflects the 19 Oct 1999 baseline.
Date:
January 12, 2000
Creator:
Gantt, D. A.
Object Type:
Report
System:
The UNT Digital Library
Advanced Solid-state Lasers - to Ignition and Beyond
This brochure concentrates on the diode-pumped solid-state laser. Surrounding it on the cover are some of the primary technological developments that make it a candidate for the means by which inertial confinement fusion will create inertial fusion energy as an inexhaustible source of electric power.
Date:
June 12, 1998
Creator:
Marshall, C.; Bibeau, C.; Orth, C.; Meier, W. R.; Payne, S. & Sutton, S.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED SOLID STATE SENSORS FOR VISION 21 SYSTEMS
Device fabrication and characterization studies relevant to the development of silicon carbide (SiC) based gas and temperature sensors have been performed. Initial studies of Pd deposition on Si were performed since the procedures for Si substrate preparation were well known to us. This allowed us to gain experience in controlling the deposition process while continuing to investigate methods of preparing the SiC substrate surface. Studies of SiC surface preparation were carried out under a separate contract. As our SiC substrate preparation techniques improved, studies of Pd deposition on SiC were performed and the thermal stability of Pd/SiC interfaces (i.e., the critical sensor component) was characterized. These studies have demonstrated that the Pd/SiC interface is remarkably stable at temperatures up to 670 C. At this time, we are moving rapidly to a point where the oxide overlayer can be reproducibly reduced to an acceptable level and large areas of the substrate can be reproducibly produced with the surface roughness reduced to the atomic scale. We believe that this will substantially improve the thermal stability of the Pd/SiC interface. In all these studies, techniques are being used that could readily be incorporated into commercial processes. Moreover, as a result of our ultrahigh …
Date:
February 12, 2003
Creator:
Meehan, K. & Stinespring, C.D.
Object Type:
Report
System:
The UNT Digital Library
Advanced thermal barrier coating system development. Technical progress report, June 1, 1997--August 31, 1997
Objectives of this program are to provide an advanced thermal barrier coating system with improved reliability and temperature capabilities. This report describes the manufacturing, deposition, bonding, non-destructive analysis; maintenance, and repair.
Date:
September 12, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced thermal barrier coating system development. Technical progress report, September 1, 1997--November 30, 1997
The objectives of this project were to provide an improved thermal barrier coating system with increased temperature capability and reliability. This report describes bond coat development, manufacturing, nondestructive evaluation, maintenance, and repair, and bench testing.
Date:
December 12, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Tokamak Scenarios for the FIRE Burning Plasma Experiment
The advanced tokamak (AT) capability of the Fusion Ignition Research Experiment (FIRE) burning plasma experiment is examined with 0-D systems analysis, equilibrium and ideal-MHD stability, radio-frequency current-drive analysis, and full discharge dynamic simulations. These analyses have identified the required parameters for attractive burning advanced tokamak plasmas, and indicate that these are feasible with the present progress on existing experimental tokamaks.
Date:
October 12, 2001
Creator:
Kessel, C.E.; Ignat, D. & Mau, T.K.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED TURBINE SYSTEM CONCEPTUAL DESIGN AND PRODUCT DEVELOPMENT
None
Date:
May 12, 1998
Creator:
Mayer, Albrecht H.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED X-BAND TEST ACCELERATOR FOR HIGH BRIGHTNESS ELECTRON AND GAMMA RAY BEAMS
In support of Compton scattering gamma-ray source efforts at LLNL, a multi-bunch test stand is being developed to investigate accelerator optimization for future upgrades. This test stand will enable work to explore the science and technology paths required to boost the current 10 Hz monoenergetic gamma-ray (MEGa-Ray) technology to an effective repetition rate exceeding 1 kHz, potentially increasing the average gamma-ray brightness by two orders of magnitude. Multiple bunches must be of exceedingly high quality to produce narrow-bandwidth gamma-rays. Modeling efforts will be presented, along with plans for a multi-bunch test stand at LLNL. The test stand will consist of a 5.5 cell X-band rf photoinjector, single accelerator section, and beam diagnostics. The photoinjector will be a high gradient standing wave structure, featuring a dual feed racetrack coupler. The accelerator will increase the electron energy so that the emittance can be measured using quadrupole scanning techniques. Multi-bunch diagnostics will be developed so that the beam quality can be measured and compared with theory. Design will be presented with modeling simulations, and layout plans.
Date:
May 12, 2010
Creator:
Marsh, R A; Anderson, S G; Barty, C P; Chu, T S; Ebbers, C A; Gibson, D J et al.
Object Type:
Article
System:
The UNT Digital Library
ADVANCEMENT OF THE RHIC BEAM ABORT KICKER SYSTEM.
As one of the most critical system for RHIC operation, the beam abort kicker system has to be highly available, reliable, and stable for the entire operating range. Along with the RHIC commission and operation, consistent efforts have been spend to cope with immediate issues as well as inherited design issues. Major design changes have been implemented to achieve the higher operating voltage, longer high voltage hold-off time, fast retriggering and redundant triggering, and improved system protection, etc. Recent system test has demonstrated for the first time that both blue ring and yellow ring beam abort systems have achieved more than 24 hours hold off time at desired operating voltage. In this paper, we report break down, thyratron reverse arcing, and to build a fast re-trigger system to reduce beam spreading in event of premature discharge.
Date:
May 12, 2003
Creator:
ZHANG,W. AHRENS,L. MI,J. OERTER,B. SANDBERG,J. WARBURTON,D.
Object Type:
Article
System:
The UNT Digital Library
Adventures in Holographic Dimer Models
We abstract the essential features of holographic dimer models, and develop several new applications of these models. Firstly, semi-holographically coupling free band fermions to holographic dimers, we uncover novel phase transitions between conventional Fermi liquids and non-Fermi liquids, accompanied by a change in the structure of the Fermi surface. Secondly, we make dimer vibrations propagate through the whole crystal by way of double trace deformations, obtaining nontrivial band structure. In a simple toy model, the topology of the band structure experiences an interesting reorganization as we vary the strength of the double trace deformations. Finally, we develop tools that would allow one to build, in a bottom-up fashion, a holographic avatar of the Hubbard model.
Date:
August 12, 2011
Creator:
Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Karch, Andreas; /Washington U., Seattle; Yaida, Sho & /Stanford U., Phys. Dept.
Object Type:
Article
System:
The UNT Digital Library
Aerocapacitor commercialization plan
The purpose of the Power-One Aerocapacitor Commercialization Plan is to communicate to members of management and to all employees the overall objectives of the corporation. Power-One, Inc., has participated in a US Federal Government Technology Reinvestment Project (TRP), entitled {open_quotes}Advanced Power Conversion based on the Aerocapacitor{close_quotes}: the project is a group effort, with Lawrence Livermore National Labs, GenCorp/Aerojet, PolyStor Corp. (a start-up company), and Power-One forming the consortium. The expected resulting technology is the {open_quotes}Aerocapacitor{close_quotes}, which possesses much higher performance levels than the usual capacitors on the market today. Power-One hopes to incorporate the Aerocapacitor into some of its products, hence enhancing their performance, as well as market privately-labeled aerocapacitors through its distribution channels. This document describes the details of Power-One`s plan to bring to market and commercialize the Aerocapacitor and Aerocapacitor-based products. This plan was formulated while Power-One was part of the Oerocap project. It has since pulled out of this project. What is presented in this plan is the work which was developed prior to the business decision to terminate this work.
Date:
September 12, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Aerosol indirect effects ? general circulation model intercomparison and evaluation with satellite data
Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within the international AEROCOM initiative, the representation of aerosol-cloud-radiation interactions in ten different general circulation models (GCMs) is evaluated using three satellite datasets. The focus is on stratiform liquid water clouds since most GCMs do not include ice nucleation effects, and none of the model explicitly parameterises aerosol effects on convective clouds. We compute statistical relationships between aerosol optical depth ({tau}{sub a}) and various cloud and radiation quantities in a manner that is consistent between the models and the satellite data. It is found that the model-simulated influence of aerosols on cloud droplet number concentration (N{sub d}) compares relatively well to the satellite data at least over the ocean. The relationship between {tau}{sub a} and liquid water path is simulated much too strongly by the models. This suggests that the implementation of the second aerosol indirect effect mainly in terms of an autoconversion parameterisation has to be revisited in the GCMs. A positive relationship between total cloud fraction (f{sub cld}) and {tau}{sub a} as found in the satellite data is simulated by the majority of the models, albeit less strongly than that in the …
Date:
March 12, 2010
Creator:
Quaas, Johannes; Ming, Yi; Menon, Surabi; Takemura, Toshihiko; Wang, Minghuai; Penner, Joyce E. et al.
Object Type:
Article
System:
The UNT Digital Library
AFCI Repository Impact Evaluation Report Systems Analysis Progress - FY03
This activity will assess the waste management benefits from AFC, specifically both short and long term benefits for the U.S. geologic repository program. This includes quantitative evaluation of repository issues (heat load and thermal management, mass and volume, radiotoxicity and dose, waste form optimization, etc.) where AFC can provide the technical basis for improvements in cost, capacity and performance for a repository, and the technical potential to defer the need for additional repositories. Supporting analysis will be obtained from ANL, LANL and SRS for inclusion into an Interim Report that will serve as input to the ''Integrated Modeling'' and ''Economic Analysis'' activities, and a Final Report that will document the results of the activity. This activity will endeavor to establish cooperation with DOE-OCRWM to establish mutual understanding of potential repository impacts.
Date:
September 12, 2003
Creator:
Halsey, W G
Object Type:
Report
System:
The UNT Digital Library
After globalization future security in a technology rich world
Over the course of the year 2000, five one-day workshops were conducted by the Center for Global Security Research at the Lawrence Livermore National Laboratory on threats that might come against the US and its allies in the 2015 to 2020 timeframe due to the global availability of advanced technology. These workshops focused on threats that are enabled by nuclear, missile, and space technology; military technology; information technology; bio technology; and geo systems technology. In December, an Integration Workshop and Senior Review before national leaders and experts were held. The participants and reviewers were invited from the DOE National Laboratories, the DOD Services, OSD, DTRA, and DARPA, the DOS, NASA, Congressional technical staff, the intelligence community, universities and university study centers, think tanks, consultants on national security issues, and private industry. For each workshop the process of analysis involved identification and prioritization of the participants' perceived most severe threat scenarios (worst nightmares), discussion of the technologies which enabled those threats, and ranking of the technologies' threat potentials. We were not concerned in this exercise with defining responses, although our assessment of each threat's severity included consideration of the ease or difficulty with which it might be countered. At the concluding …
Date:
February 12, 2000
Creator:
Gilmartin, T J
Object Type:
Article
System:
The UNT Digital Library
Agitation within Mk-42 insert caused by air sparge
Dissolution of Rocky Flats Pu alloys and Pu metal using a nested insert'' configuration (One Well Insert (S-3352) inside the Mk-42 Insert) will require a Nuclear Safety Study, a major assumption of which will be that the annular dissolver is well-mixed. The well-mixed'' assumption was theoretically and experimentally supported for alloy dissolution using the Three Well Insert, but the present situation differs significantly. In the former case, the insert was directly exposed to the agitation induced by air sparging; in the case under consideration, the One Well Insert would be shielded by the Mk-42 Insert. In an effort to determine if the nested insert'' approach should be pursued, the past studies and technical literature have been surveyed and an attempt made to predict the extent of mixing and bulk circulation for a nested insert'' configuration in the presence of air sparging.
Date:
July 12, 1991
Creator:
Ramsey, C.J.
Object Type:
Report
System:
The UNT Digital Library
Agitation within Mk-42 insert caused by air sparge
Dissolution of Rocky Flats Pu alloys and Pu metal using a ``nested insert`` configuration (One Well Insert (S-3352) inside the Mk-42 Insert) will require a Nuclear Safety Study, a major assumption of which will be that the annular dissolver is well-mixed. The ``well-mixed`` assumption was theoretically and experimentally supported for alloy dissolution using the Three Well Insert, but the present situation differs significantly. In the former case, the insert was directly exposed to the agitation induced by air sparging; in the case under consideration, the One Well Insert would be shielded by the Mk-42 Insert. In an effort to determine if the ``nested insert`` approach should be pursued, the past studies and technical literature have been surveyed and an attempt made to predict the extent of mixing and bulk circulation for a ``nested insert`` configuration in the presence of air sparging.
Date:
July 12, 1991
Creator:
Ramsey, C. J.
Object Type:
Report
System:
The UNT Digital Library
AGS Booster Beam Position, Tune, and Longitudinal Profile Data Acquisition System.
In this paper we will describe a data acquisition system designed and developed for the AGS Booster. The system was motivated by the need to get high quality beam diagnostics from the AGS Booster. This was accomplished by locating the electronics and digital data acquisition close to the Booster ring, to minimize loss of bandwidth in the original signals. In addition we had to develop the system rapidly and at a low cost. The system consists of a Lecroy digital oscilloscope which is interfaced through a National Instruments LabView{trademark} server application, developed for this project. This allows multiple client applications to time share the scope without interfering with each other. We will present a description of the system design along with example clients that we have implemented.
Date:
May 12, 2003
Creator:
Brown, K. A.; Ahrens, L.; Severino, F.; Smith, K. & Wilinski, M.
Object Type:
Article
System:
The UNT Digital Library
THE AGS ELECTROSTATIC SEPTUM.
The previous slow beam extraction electro static septum in the AGS was designed in 1981. Research documented at the Fermi Laboratory was used as the base line for this design. The septum consisted of a ground plane of .002 inch diameter wire tungsten-rhenium alloy (75%W 25%Re) with a hollow welded titanium cathode assembly. The vacuum chamber is stationary and the septum is moved with a pair of high vacuum linear feed throughs. After years of beam time, the frequency of failures increased. The vacuum system design was poor by today's standards and resulted in long pump down times after repairs. The failures ranged from broken septum wires to a twisted cathode. In addition to the failures, the mechanical drive system had too much backlash, making the operating position difficult to repeat. The new septum needed to address all of these issues in order to become a more reliable septum.
Date:
May 12, 2003
Creator:
HOCK,J. RUSSO,T. GLEN,J. BROWN,K.
Object Type:
Article
System:
The UNT Digital Library
The AGS {gamma}{sub t}-jump system
None
Date:
September 12, 1994
Creator:
Syphers, M. J.; Ahrens, L.; van Asselt, W. & Brennan, J. M.
Object Type:
Report
System:
The UNT Digital Library
AGS model in Zgoubi RHIC run 13 polarization modeling status
N/A
Date:
May 12, 2013
Creator:
F., Meot; Ahrens, L.; Brown, K.; Dutheil, Y.; Glenn, J.; Harper, C. et al.
Object Type:
Article
System:
The UNT Digital Library
AGS UPGRADE TO 1-MW WITH A SUPER CONDUCTING LINAC INJECTOR.
It has been proposed to upgrade the Alternating Gradient Synchrotron (AGS) accelerator complex at the Brookhaven National Laboratory (BNL) to provide an average proton beam power of 1 MW at the energy of 28 GeV. The facility is to be primarily used as a proton driver for the production of intense neutrino beams [l]. This paper reports on the feasibility study of a proton Super-Conducting Linac (SCL) as a new injector to the AGS. The Linac beam energy is 1.3 GeV. The beam intensity is adjusted to provide the required average beam power of 1 MW at 28 GeV. The repetition rate of the SCL-AGS facility is 2.5 beam pulses per second.
Date:
May 12, 2003
Creator:
RUGGIERO,A. GALESSI,J. RAPARIA,D. ROSER,T. WENG,W.
Object Type:
Article
System:
The UNT Digital Library
AI reference LMFBR steam-generator development
The Design Data Sheets summarize the key parameters being used in the design and analysis of the AI Prototype LMFBR Steam Generator. These Data Sheets supplement SDD-097-330-002, Steam Generator System, 1450 psi Steam Conditions. This document will serve as the baseline design data control until a GE/RRD approved steam generator specification with ordering data is received.
Date:
October 12, 1973
Creator:
Anderson, T.L.
Object Type:
Report
System:
The UNT Digital Library
Air convection noise of pencil-beam interferometer for long traceprofiler
In this work, we investigate the effect of air convection onlaser-beam pointing noise essential for the long trace profiler (LTP). Wedescribe this pointing error with noise power density (NPD) frequencydistributions. It is shown that the NPD spectra due to air convectionhave a very characteristic form. In the range of frequencies from ~;0.05Hz to ~;0.5 Hz, the spectra can be modeled with an inverse-power-lawfunction. Depending on the intensity of air convection that is controlledwith a resistive heater of 100 to 150 mW along a one-meter-long opticalpath, the power index lies between 2 and 3 at an overall rms noise of~;0.5 to 1 microradian. The efficiency of suppression of the convectionnoise by blowing air across the beam optical path is also discussed.Air-blowing leads to a white-noise-like spectrum. Air blowing was appliedto the reference channel of an LTP allowing demonstration of thecontribution of air convection noise to the LTP reference beam. Theability to change (with the blowing technique presented) the spectralcharacteristics of the beam pointing noise due to air convection allowsone to investigate the contribution of the convection effect, and thusmake corrections to the power spectral density spectra measured with theLTP.
Date:
July 12, 2006
Creator:
Yashchuk, Valeriy V.; Irick, Steve C.; MacDowell, Alastair A.; McKinney, Wayne R. & Takacs, Peter Z.
Object Type:
Article
System:
The UNT Digital Library