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Pump Side-scattering in Ultra-powerful Backward Raman Amplifiers
Extremely large laser power might be obtained by compressing laser pulses through backward Raman amplification (BRA) in plasmas. Premature Raman backscattering of a laser pump by plasma noise might be suppressed by an appropriate detuning of the Raman resonance, even as the desired amplification of the seed persists with a high efficiency. In this paper, we analyze side-scattering of laser pumps by plasma noise in backward Raman amplifiers. Though its growth rate is smaller than that of backscattering, the side-scattering can nevertheless be dangerous, because of a longer path of side-scattered pulses in plasmas and because of an angular dependence of the Raman resonance detuning. We show that side-scattering of laser pumps by plasma noise in BRA might be suppressed to a tolerable level at all angles by an appropriate combination of two detuning mechanisms associated with plasma density gradient and pump chirp.
Date:
March 2, 2004
Creator:
A.A. Solodov, V.M. Malkin, and N.J. Fisch
System:
The UNT Digital Library
Preliminary Leaching Tests for the Extraction of Uranium From Various Monticello Stockpile Ores
In a section of the area occupied by the Atomic Energy Commission in Grand Junction, Colorado, a pilot plant is being erected to test a resin-in-pulp process. The process is based on the adsorption of uranium by resin from acid pulps. The first ores to be treated at this plant will be Monticello Stockpile Material. Samples of the various stockpiles sere subjected to a series of leaching, filtering and settling tests, the results of which are presented in this report.
Date:
March 2, 1953
Creator:
Abrams, Charles S.; Moulton, Harry D. & Viklund, Hans I.
System:
The UNT Digital Library
Exotic physics: search for long-lived doubly-charged higgs bosons in p anti-p collisions at s**(1/2) = 1.96 tev
We present a search for long-lived doubly-charged Higgs bosons (H{sup {+-}{+-}}), with signatures of high ionization energy loss and muon-like penetration. We use 292 pb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV by the CDF II detector at the Fermilab Tevatron. Observing no evidence of long-lived doubly-charged particle production, we exclude H{sub L}{sup {+-}{+-}} and H{sub R}{sup {+-}{+-}} bosons with masses below 133 GeV/c{sup 2} and 109 GeV/c{sup 2}, respectively. In the degenerate case we exclude H{sup {+-}{+-}} mass below 146 GeV/c{sup 2}. All limits are quoted at the 95% confidence level.
Date:
March 2, 2005
Creator:
Acosta, D.
System:
The UNT Digital Library
Beyond the dna: a prototype for functional genomics
A prototype oligonucleotide ''functional chip'' has been developed to screen novel DNA repair proteins for their ability to bind or alter different forms of DNA. This chip has been developed as a functional genomics screen for analysis of protein-DNA interactions for novel proteins identified from the Human Genome Project The process of novel gene identification that has ensued as a consequence of available sequence information is remarkable. The challenge how lies in determining the function of newly identified gene products in a time-and cost-effective high-throughput manner. The functional chip is generated by the robotic application of DNA spotted in a microarray format onto a glass slide. Individual proteins are then analyzed against the different form of DNA bound to the slide. Several prototype functional chips were designed to contain various DNA fragments tethered to a glass slide for analysis of protein-DNA binding or enzymatic activity of known proteins. The technology has been developed to screen novel, putative DNA repair proteins for their ability to bind various types of DNA alone and in concert with protein partners. An additional scheme has been devised to screen putative repair enzymes for their ability to process different types of DNA molecules. Current methods to …
Date:
March 2, 2000
Creator:
Albala, J
System:
The UNT Digital Library
The 2010 Oil Spill: MMS/BOEMRE and NEPA
This report reviews the environmental procedures required following the explosion of an oil well on a tract leased by BP from the federal government.
Date:
March 2, 2011
Creator:
Alexander, Kristina
System:
The UNT Digital Library
Indoor Measurements of Environmental Tobacco Smoke Final Report to the Tobacco Related Disease Research Program
The objective of this research project was to improve the basis for estimating environmental tobacco smoke (ETS) exposures in a variety of indoor environments. The research utilized experiments conducted in both laboratory and ''real-world'' buildings to (1) study the transport of ETS species from room to room, (2) examine the viability of using various chemical markers as tracers for ETS, and (3) to evaluate to what extent re-emission of ETS components from indoor surfaces might add to the ETS exposure estimates. A three-room environmental chamber was used to examine multi-zone transport and behavior of ETS and its tracers. One room (simulating a smoker's living room) was extensively conditioned with ETS, while a corridor and a second room (simulating a child's bedroom) remained smoking-free. A series of 5 sets of replicate experiments were conducted under different door opening and flow configurations: sealed, leaky, slightly ajar, wide open, and under forced air-flow conditions. When the doors between the rooms were slightly ajar the particles dispersed into the other rooms, eventually reaching the same concentration. The particle size distribution took the same form in each room, although the total numbers of particles in each room depended on the door configurations. The particle number …
Date:
March 2, 2004
Creator:
Apte, Michael G.; Gundel, Lara A.; Dod, Raymond L.; Russell, Marion L.; Singer, Brett C.; Sohn, Michael D. et al.
System:
The UNT Digital Library
Slug cocking and column bowing experiments
A large number of ``hot spot`` slug failures characterized by intergranular corrosion of the aluminum can have occurred in the past year. The cause of this type of failure may be vertical displacement of one or more slugs in the slug columns. To determine if such displacement may reasonably be expected and to determine the cause and cure of the displacement a set of experiments have been performed in the 189-D laboratory. This document presents data which has been thus far collected. (1) Slugs which are cocked in a process tube are cause for severe-column bowing. Bowing is most severe when the cocked slug is in the downstream portion of the tube. Stopping flow will not realign bowed slugs. (2) Flow seating a slug column can cause slugs to cock and cocked slugs remain cocked even when backseated and the water flow is stopped. (3) When all slugs have undamaged ends and are well aligned with the tube ribs as well as fully seated against the rear nozzle insert, only minor bowing will occur, even when the upstream end of the slug column is restrained. (4) Anodized pieces behave erratically and in an unexplained manner. (5) Flows as much as …
Date:
March 2, 1956
Creator:
Arneson, S. O.
System:
The UNT Digital Library
Technical basis for the internal dosimetry program at the Y-12 Plant
Since the beginning of plant operations. almost all work with radioactive materials has involved isotopes associated with uranium, enriched or depleted in U[sup 235]. While limited quantities of isotopes of elements other than uranium are present, workplace monitoring and precess knowledge have established that internal exposure from these other isotopes is insignificant in comparison with uranium. While the changing plant mission may necessitate the consideration of internal exposure from other isotopes at some point in time, only enriched and depleted uranium will be considered in this basis document. The portions of the internal dosimetry technical basis which may be unique to the Y-12 Plant is considered in this manual. This manual presents the technical basis of the routine in vivo and in vitro bioassay programs including choice of frequency, participant selection criteria, and action level guidelines. Protocols for special bioassay will be presented in the chapters which described the basis for intake, uptake, and dam assessment. A discussion of the factors which led to the need to develop a special biokinetic model for uranium at the Y-12 Plant, as well as a description of the model's basic parameters, are included in this document.
Date:
March 2, 1992
Creator:
Ashley, J.C.; Barber, J.M.; Snapp, L.M. & Turner, J.E.
System:
The UNT Digital Library
Congressional Organization for Science and Technology, 91st Congress, 2nd Session: A Listing of Congressional Committees and Subcommittees Having Jurisdiction over Scientific and Technological Activities
This report provides a listing of congressional committees and subcommittees related to science and technology.
Date:
March 2, 1970
Creator:
Ayton, Mauree W.
System:
The UNT Digital Library
Endangered Species Act Amendments: An Analysis of S. 1180 and H.R. 2351
Because of wide-spread interest in possible amendments to the Endangered Species Act (ESA), CRS has received numerous requests for an analysis and critique of S.1180 and H.R. 2351. This report analyzes those bills. HR. 2351 was introduced on July 31, 1997 and S. 1180 on September 16, 1997. Each bill is discussed under various topic headings. The Senate bill will be described first, since it has been reported.
Date:
March 2, 1998
Creator:
Baldwin, Pamela & Corn, M. Lynne
System:
The UNT Digital Library
Trade Promotion Authority and the U.S.-South Korea Free Trade Agreement
This report looks at the effects of the Korean Free Trade Agreement (KORUS FTA) on side agreements via the North American Free Trade Agreement (NAFTA).
Date:
March 2, 2011
Creator:
Barbour, Emily C.
System:
The UNT Digital Library
Tank Monitoring and Control System (TMACS) Version Description Document (VDD)
This document updates the Version Description Document with the changes incorporated in the Revision 11.2 software installation on the Tank Monitor and Control System (TMACS).
Date:
March 2, 2000
Creator:
Barnes, D. A.
System:
The UNT Digital Library
Safety equipment list for the light duty utility arm system
The initial issue (Revision 0) of this Safety Equipment List (SEL) for the Light Duty Utility Arm (LDUA) requires an explanation for both its existence and its being what it is. All LDUA documentation leading up to creation of this SEL, and the SEL itself, is predicated on the LDUA only being approved for use in waste tanks designated as Facility Group 3, i.e., it is not approved for use in Facility Group 1 or 2 waste tanks. Facility Group 3 tanks are those in which a spontaneous or induced hydrogen gas release would be small, localized, and would not exceed 25% of the LFL when mixed with the remaining air volume in the dome space; exceeding these parameters is considered unlikely. Thus, from a NFPA flammable gas environment perspective the waste tank interior is not classified as a hazardous location. Furthermore, a hazards identification and evaluation (HNF-SD-WM-HIE-010, REV 0) performed for the LDUA system concluded that the consequences of actual LDUA system postulated accidents in Flammable Gas Facility Group 3 waste tanks would have either NO IMPACT or LOW IMPACT on the offsite public and onsite worker. Therefore, from a flammable gas perspective, there is not a rationale for …
Date:
March 2, 1998
Creator:
Barnes, G. A.
System:
The UNT Digital Library
Thick Thermal Barrier Coatings (TTBCs) for Low Emission, High Efficiency Diesel Engine Components
The objective of this program was to advance the fundamental understanding of thick thermal barrier coating (TTBC) systems for application to low heat rejection diesel engine combustion chambers. Previous reviews of thermal barrier coating technology concluded that the current level of understanding of coating system behavior is inadequate and the lack of fundamental understanding may impede the application of thermal barrier coating to diesel engines.(1) Areas of TTBC technology examined in this program include powder characteristics and chemistry; bond coating composition, coating design, microstructure and thickness as they affect properties, durability, and reliability; and TTBC "aging" effects (microstructural and property changes) under diesel engine operating conditions. Fifteen TTBC ceramic powders were evaluated. These powders were selected to investigate the effects of different chemistries, different manufacturing methods, lot-to-lot variations, different suppliers and varying impurity levels. Each of the fifteen materials has been sprayed using 36 parameters selected by a design of experiments (DOE) to determine the effects of primary gas (Ar and N2), primary gas flow rate, voltage, arc current, powder feed rate, carrier gas flow rate, and spraying distance. The deposition efficiency, density, and thermal conductivity of the resulting coatings were measured. A coating with a high deposition efficiency and …
Date:
March 2, 2006
Creator:
Beardsley, M. Brad; Socie, Darrell; Redja, Ed & Berndt, Christopher
System:
The UNT Digital Library
Intelligence Issues for Congress
This report includes information regarding intelligence issues for Congress. Recent developments, background and analysis, and selected 106th Congress legislation are among topics discussed in this report.
Date:
March 2, 2001
Creator:
Best, Richard A., Jr.
System:
The UNT Digital Library
Alaska Wood Biomass Energy Project Final Report
The purpose of the Craig Wood Fired Boiler Project is to use waste wood from local sawmilling operations to provide heat to local public buildings, in an effort to reduce the cost of operating those buildings, and put to productive use a byproduct from the wood milling process that otherwise presents an expense to local mills. The scope of the project included the acquisition of a wood boiler and the delivery systems to feed wood fuel to it, the construction of a building to house the boiler and delivery systems, and connection of the boiler facility to three buildings that will benefit from heat generated by the boiler: the Craig Aquatic Center, the Craig Elementary School, and the Craig Middle School buildings.
Date:
March 2, 2009
Creator:
Bolling, Jonathan
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1930
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1930, activities, finance, public relations, organizational leadership, and other information about scouting programs.
Date:
March 2, 1931
Creator:
Boy Scouts of America
System:
The Portal to Texas History
The Department of Housing and Urban Development: FY2007 Budget
This report provides information about the The Department of Housing and Urban Development for FY2007 Budget.
Date:
March 2, 2007
Creator:
Boyd, Eugene; Perl, Libby; Foote, Bruce E.; Peterson, Meredith & McCarthy, Maggie
System:
The UNT Digital Library
Process test evaluation report, 241-C-105
This document provides test data and analysis for the 241-C-105 process test.
Date:
March 2, 1995
Creator:
Bragg, D.A.
System:
The UNT Digital Library
The Mechanisms of Grain Boundaries - Slip Transmission, Migration, and Sliding
During the last eight years, we have worked on the general problems associated with grain boundaries in metals with DOE support. This final report summarizes the work that has been performed. At the start of this work, we took a much more atomistic approach to grain boundaries. However, as we performed this research it became clear that such approaches had the drawbacks listed above, and that we were not proceeding toward the more general understanding of grain boundaries that we have hoped to achieve. We then moved toward more macroscopic based experiments that we could use to understand the structure and motion of grain boundaries. From these we were able to begin deducing some of the most important results of this work and to provide information that can be used by others to understand the role of grain boundaries in materials. We thus present this report in a topical way and provide the experimental and theoretical underpinning that is needed at each point as we go forward.
Date:
March 2, 2005
Creator:
Briant, Clyde L.
System:
The UNT Digital Library
Uses and Sources of Federal Government Budget Funds (Unified Budget Concept and Federal Funds Basis), Fiscal Years 1971-1973
This report is a compilation of information concerning the federal government budget funds in the United States for the years 1971-1973.
Date:
March 2, 1972
Creator:
Brite, George K. & Oremland, Barbara R.
System:
The UNT Digital Library
Completion of Milestone 2.2.4.2.2/FY01/A ''Completion of Mechanical Assembly of PuCTF in the Plutonium Facility''
The subject milestone was completed on March 1st. This milestone signifies the completion the mechanical installation and assembly of PuCTF in room 1345 in the LLNT Plutonium Facility. This installation included equipment both in room 1345 and in the loft, As reported in the last milestone, ''LLNL Pu Facility space prepared for installation of PUCTF'', milestone 6.2.2/Fy00/c, steel plates had been installed on the floor to support the PuCTF glovebox and equipment. The steel plate system was a substantial help in completing the mechanical installation reported here. The glovebox sections were brought into the room and attached together. Temporary seismic tie-down straps were used to brace the assembly. This temporary tie-down also provided Flexibility for alignment and adjustment. The internal equipment, (attritors, granulator, press feed shoe and die set, furnace, robot and powder transport system) were subsequently installed. The glovebox was then welded to the steel plates for permanent seismic anchoring. The control racks were attached to the floor and are ready for wiring and the press hydraulic power unit has been installed in the loft.
Date:
March 2, 2001
Creator:
Brummond, W & Armantrout, G
System:
The UNT Digital Library
Unauthorized Employment in the United States: Issues, Options, and Legislation
As immigration reform and the illegal alien population have gained congressional and public attention in the past several years, the issue of unauthorized employment has come to the fore. It is widely accepted that most unauthorized aliens enter and remain in the United States in order to work. This report discusses options for addressing the issue of unauthorized employment in the United States.
Date:
March 2, 2009
Creator:
Bruno, Andorra
System:
The UNT Digital Library
Quality assurance program plan for the Site Physical and Electrical Calibration Services Lab. Revision 1
This Quality Assurance Program Plan (QAPP) is organized to address WHC`s implementation of quality assurance requirements as they are presented as interpretive guidance endorsed by the Department of Energy (DOE) Field Office, Richland DOE Order 5700.6C Quality Assurance. The quality assurance requirements presented in this plan will assure Measuring and Test Equipment (M and TE) are in conformance with prescribed technical requirements and that data provided by testing, inspection, or maintenance are valid. This QAPP covers all activities and work elements that are variously called QA, quality control, and quality engineering regardless of the organization performing the work. This QAPP identifies the QA requirements for planning, control, and documentation of operations, modifications, and maintenance of the WHC Site Physical and Electrical Calibration Services Laboratory. The primary function of the WHC Site Physical and Electrical Calibration Services Laboratory is providing calibration, standardization, or repair service of M and TE.
Date:
March 2, 1995
Creator:
Carpenter, C.A.
System:
The UNT Digital Library