Space-charge compensation in high-intensity proton rings (open access)

Space-charge compensation in high-intensity proton rings

Recently, it was proposed to use negatively charged electron beams for compensation of beam-beam effects due to protons in the Tevatron collider. The authors show that a similar compensation is possible in space-charge dominated low energy proton beams. The idea has a potential of several-fold increase of the FNAL Booster beam brightness. Best results will be obtained using three electron lenses around the machine circumference, using co-moving electron beam with time structure and profile approximately matched to the proton beam. This technique, if feasible, will be more cost effective than the straightforward alternative of increasing the energy of the injection linac.
Date: September 21, 2000
Creator: A. Burov, G.W. Foster and V.D. Shiltsev
Object Type: Report
System: The UNT Digital Library
The RHIC Reference Geometry (open access)

The RHIC Reference Geometry

None
Date: August 21, 1992
Creator: A., Goldman M.
Object Type: Report
System: The UNT Digital Library
Monte Carlo Simulations of Phosphate Polyhedron Connectivity in Glasses (open access)

Monte Carlo Simulations of Phosphate Polyhedron Connectivity in Glasses

Monte Carlo simulations of phosphate tetrahedron connectivity distributions in alkali and alkaline earth phosphate glasses are reported. By utilizing a discrete bond model, the distribution of next-nearest neighbor connectivities between phosphate polyhedron for random, alternating and clustering bonding scenarios was evaluated as a function of the relative bond energy difference. The simulated distributions are compared to experimentally observed connectivities reported for solid-state two-dimensional exchange and double-quantum NMR experiments of phosphate glasses. These Monte Carlo simulations demonstrate that the polyhedron connectivity is best described by a random distribution in lithium phosphate and calcium phosphate glasses.
Date: December 21, 1999
Creator: ALAM,TODD M.
Object Type: Article
System: The UNT Digital Library
STATUS OF THE EBIS PROJECT AT BROOKHAVEN. (open access)

STATUS OF THE EBIS PROJECT AT BROOKHAVEN.

None
Date: August 21, 2006
Creator: ALESSI, J.; BARTON, D.; BEEBE, E. & AL., ET
Object Type: Article
System: The UNT Digital Library
Search for Pair Production of First Or Second Generation Leptoquarks in Proton-Proton Collisions at sqrt(s)=7 TeV using the ATLAS detector at the LHC (open access)
Dissolution of low-enriched UO{sub 2}/Al dispersion plates in alkaline peroxide solution. (open access)

Dissolution of low-enriched UO{sub 2}/Al dispersion plates in alkaline peroxide solution.

Some conclusions from this report are: (1) A UO{sub 2}/Al dispersion target can be successfully dissolved in alkaline peroxide solutions; (2) after destruction of the peroxide recovery of the {sup 99}Mo would be nearly identical to existing processes using basic dissolution; (3) a low-enriched UO{sub 2}/Al dispersion targets could potentially be used for the production of {sup 99}Mo; and (4) punched cores from a UO{sub 2}/Al dispersion target will be irradiated to low-level burnup and effects of this LEU target on the recovery of {sup 99}Mo will be investigated. A commercial partner will be sought for full scale demonstrations.
Date: October 21, 1997
Creator: Aase, S.; Conner, C.; Landsberger, S.; Vandegrift, G. F.; Wu, D. & Wygmans, D. G.
Object Type: Article
System: The UNT Digital Library
Roles and Delegation of Authority (R/DA) System (open access)

Roles and Delegation of Authority (R/DA) System

The processes of defining managerial roles and providing for delegation of authority are essential to any enterprise. At most large organizations, these processes are defined in policy manuals and through sets of standard operating procedures for many, if not all, business and administrative functions. Many of these staff-initiated, administrative functions require the routing of documents for approval to one or more levels of management. These employee-oriented, back office types of workflows tend to require more flexibility in determining to whom these documents should go to, while, at the same time, providing the responsible parties with the flexibility to delegate their approval authority or allow others to review their work. Although this practice is commonplace in manual, paper-based processes that exist in many organizations, it is difficult to provide the same flexibility in the more structured, electronic-based, workflow systems.
Date: October 21, 1999
Creator: Abbott, John P.; Hutchins, James C. & Schoch, David G.
Object Type: Article
System: The UNT Digital Library
Drying Results of K-Basin Damaged/Corroded SNF Internal Sludge and Surface Coating (open access)

Drying Results of K-Basin Damaged/Corroded SNF Internal Sludge and Surface Coating

Experiments were performed using a thermogravimetric analysis (TGA) system by Pacific Northwest National Laboratory (PNNL)to study the drying behavior of the K-Basin spent nuclear fuel (SNF) internal sludge and two different surface coatings of SNF elements. These measurements were conducted in support of the safety and process analyses of the proposed Integrated Process Strategy (IPS) to move the N-Reactor fuel stored at K-Basin to an interim storage facility. These limited experiments on the corrosion products of K-Basin SNF material were part of the broad studies performed to ascertain the bounding pressurization of the Multi-Canister Overpack (MCO). Seven SNF internal sludge samples taken from different damage regions of three damaged/corroded outer K-Basin SNF elements were dried. Additionally, two surface coating samples taken from two SNF elements stored at K-West were tested. All the tests were performed in a vacuum atmosphere with the same temperature ramp rate of about 0.4 C/ min. Each TGA test sample was weighed before and after the test on a balance located in the Shielded Analytical Laboratory hot cell. The test samples were vacuum dried in the TGA system for about 24 hours prior to heating them at the rate of 0.4 C/min. The observations from the …
Date: September 21, 2000
Creator: Abrefah, J.; Alexander, D. L. & Marschman, S. C.
Object Type: Report
System: The UNT Digital Library
Building 419 Closure Report - May 2013 (open access)

Building 419 Closure Report - May 2013

None
Date: May 21, 2013
Creator: Abri, M.
Object Type: Report
System: The UNT Digital Library
Compact, Inexpensive, Safe, and Rapidly Refuelable Hydrogen Storage in Cryogenic Pressure Vessels (open access)

Compact, Inexpensive, Safe, and Rapidly Refuelable Hydrogen Storage in Cryogenic Pressure Vessels

None
Date: September 21, 2012
Creator: Aceves, S. M.; Petitpas, G.; Espinosa-Loza, F.; Matthews, M. J. & Ledesma-Orozco, E.
Object Type: Article
System: The UNT Digital Library
Exotic physics: search for excited and exotic electrons in the e gamma decay channel in p anti-p collisions at s**(1/2) = 1.96 tev (open access)

Exotic physics: search for excited and exotic electrons in the e gamma decay channel in p anti-p collisions at s**(1/2) = 1.96 tev

We present a search for excited and exotic electrons (e*) decaying to an electron and a photon, both with high transverse momentum. We use 202 pb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV with the CDF II detector. No signal above standard model expectation is seen for associated ee* production. We discuss the e* sensitivity in the parameter space of the excited electron mass M{sub e*} and the compositeness energy scale {Lambda}. In the contact interaction model, we exclude 132 GeV/c{sup 2} < M{sub e*} < 879 GeV/c{sup 2} for {Lambda} = M{sub e*} at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 GeV/c{sup 2} < M{sub e*} < 430 GeV/c{sup 2} at 95% C.L. for the phenomenological coupling f/{Lambda} {approx} 10{sup -2} GeV{sup -1}.
Date: February 21, 2005
Creator: Acosta, D.
Object Type: Report
System: The UNT Digital Library
Tracer Developments: Results of Experimental Studies (open access)

Tracer Developments: Results of Experimental Studies

Tracers can be used to monitor the movement of groundwaters and geothermal fluids and they can be used as a reference to quantify changes in fluid chemistry as a result of injection. Despite their potential importance to the geothermal operator, very few tracers are presently available and of those that are, little is known about their stability or behavior at the elevated temperatures that typify resources capable of electric power generation. During the past two years the University of Utah Research Institute has been involved in tracer research and testing, largely through the DOE Injection Research Program. The purpose of this paper is to summarize the results of these laboratory and field investigations.
Date: January 21, 1986
Creator: Adams, M. C.; Ahn, J. H.; Bentley, H.; Moore, J. N. & Veggeberg, S.
Object Type: Article
System: The UNT Digital Library
Science-Driven Network Requirements for ESnet (open access)

Science-Driven Network Requirements for ESnet

The Energy Sciences Network (ESnet) is the primary providerof network connectivity for the US Department of Energy Office ofScience, the single largest supporter of basic research in the physicalsciences in the United States. In support of the Office of Scienceprograms, ESnet regularly updates and refreshes its understanding of thenetworking requirements of the instruments, facilities and scientiststhat it serves. This focus has helped ESnet to be a highly successfulenabler of scientific discovery for over 20 years. In August, 2002 theDOE Office of Science organized a workshop to characterize the networkingrequirements for Office of Science programs. Networking and middlewarerequirements were solicited from a representative group of scienceprograms. The workshop was summarized in two documents the workshop finalreport and a set of appendixes. This document updates the networkingrequirements for ESnet as put forward by the science programs listed inthe 2002 workshop report. In addition, three new programs have beenadded. Theinformation was gathered through interviews with knowledgeablescientists in each particular program or field.
Date: February 21, 2006
Creator: Adams, Paul; Canon, Shane; Carter, Steven; Draney, Brent; Greenwald, Martin; Hodges, Jason et al.
Object Type: Report
System: The UNT Digital Library
PROPOSED METHOD FOR REMOVAL OF RADIO-IODINE VAPOR FROM EXPERIMENT OFF-GAS SYSTEM OF THE ORR (open access)

PROPOSED METHOD FOR REMOVAL OF RADIO-IODINE VAPOR FROM EXPERIMENT OFF-GAS SYSTEM OF THE ORR

None
Date: May 21, 1958
Creator: Adams, R. E. & Browning, W. E.
Object Type: Report
System: The UNT Digital Library
INSTRUMENTATION FLOW PLAN SYMBOLS AND RECOMMENDED DRAWINGS. A STANDARD SYSTEM FOR ORNL INSTRUMENTATION APPLICATION WORK (open access)

INSTRUMENTATION FLOW PLAN SYMBOLS AND RECOMMENDED DRAWINGS. A STANDARD SYSTEM FOR ORNL INSTRUMENTATION APPLICATION WORK

A system of symbols and identifications for processinstrumentation equipment to promote a uniformity of practice is presented. The system is for the following uses: designation and identification of instruments on flow pInns; recording specifinations, listings, requisitions, and purchase orders; indication of items on piping diagrams and other construction drawings; identification tagging of equipment; and description in technical and trade literature. (J.S.R.)
Date: February 21, 1958
Creator: Adams, R. K.; Davis, D. G. & Hyland, R. F.
Object Type: Report
System: The UNT Digital Library
INDEPENDENT VERIFICATION SURVEY REPORT OPERABLE UNIT-1 LANDFILL TRENCHES, MIAMISBURG CLOSURE PROJECT (open access)

INDEPENDENT VERIFICATION SURVEY REPORT OPERABLE UNIT-1 LANDFILL TRENCHES, MIAMISBURG CLOSURE PROJECT

INDEPENDENT VERIFICATION SURVEY REPORT FOR THE OPERABLE UNIT-1 LANDFILL TRENCHES, MIAMISBURG CLOSURE PROJECT, MIAMISBURG, OHIO DCN: 0468-SR-03-0
Date: July 21, 2010
Creator: Adams, W.C.
Object Type: Report
System: The UNT Digital Library
Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion (open access)

Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion

Crevice corrosion may initiate in confined regions due to transport limitations, followed by an accumulation of a highly corrosive chemistry, capable of dissolving the metal. The metal and the crevice former surface roughness, the presence of particulates under the crevice former and the accumulation of solid corrosion products at the corroding site would significantly affect the current and potential distribution at the anode by increasing the ohmic potential drop. Most crevice corrosion models focus on a smooth walled crevice of uniform gap and do not account for the changing profile after crevice corrosion has been initiated. In this work we analyze the crevice (anodic) region and apply current and potential distribution models to examine the effects of the perturbed surface topography. The analysis focuses on three related issues: (1) the effects of surface roughness of the metal and the crevice former, (2) the effects of particulates under the crevice former, and (3) the evolution of the crevice profile with corrosion product accumulation at the active, anodic region.
Date: December 21, 2006
Creator: Agarwal, A. S.; Landau, U.; Shan, X. & Payer, J. H.
Object Type: Report
System: The UNT Digital Library
New Design Methods And Algorithms For High Energy-Efficient And Low-cost Distillation Processes (open access)

New Design Methods And Algorithms For High Energy-Efficient And Low-cost Distillation Processes

This project sought and successfully answered two big challenges facing the creation of low-energy, cost-effective, zeotropic multi-component distillation processes: first, identification of an efficient search space that includes all the useful distillation configurations and no undesired configurations; second, development of an algorithm to search the space efficiently and generate an array of low-energy options for industrial multi-component mixtures. Such mixtures are found in large-scale chemical and petroleum plants. Commercialization of our results was addressed by building a user interface allowing practical application of our methods for industrial problems by anyone with basic knowledge of distillation for a given problem. We also provided our algorithm to a major U.S. Chemical Company for use by the practitioners. The successful execution of this program has provided methods and algorithms at the disposal of process engineers to readily generate low-energy solutions for a large class of multicomponent distillation problems in a typical chemical and petrochemical plant. In a petrochemical complex, the distillation trains within crude oil processing, hydrotreating units containing alkylation, isomerization, reformer, LPG (liquefied petroleum gas) and NGL (natural gas liquids) processing units can benefit from our results. Effluents from naphtha crackers and ethane-propane crackers typically contain mixtures of methane, ethylene, ethane, propylene, …
Date: November 21, 2013
Creator: Agrawal, Rakesh
Object Type: Report
System: The UNT Digital Library
Purdue Solar Energy Utilization Laboratory (open access)

Purdue Solar Energy Utilization Laboratory

The objective of this project is to establish and set-up a laboratory that will facilitate research and development of new low-cost and high-efficiency solar energy utilization technologies at Purdue University. The outcome will help spur the creation of solar energy start-up companies and eventually a solar energy industry in Indiana that can help fulfill the growing national demand for solar energy.
Date: January 21, 2014
Creator: Agrawal, Rakesh
Object Type: Report
System: The UNT Digital Library
Recommendations for a Static Cosmic Ray Shield for Enriched Germanium Detectors (open access)

Recommendations for a Static Cosmic Ray Shield for Enriched Germanium Detectors

This document provides a detailed study of cost and materials that could be used to shield the detector material of the international Tonne-scale germanium neutrinoless double-beta decay experiment from hadronic particles from cosmic ray showers at the Earth's surface. This work was motivated by the need for a shield that minimizes activation of the enriched germanium during storage; in particular, when the detector material is being worked on at the detector manufacturer's facility. This work considers two options for shielding the detector material from cosmic ray particles. One option is to use a pre-existing structure already located near the detector manufacturer, such as Canberra Industries in Meriden, Connecticut. The other option is to build a shield onsite at a detector manufacturer's site. This paper presents a cost and efficiency analysis of such construction.
Date: September 21, 2011
Creator: Aguayo Navarrete, Estanislao; Orrell, John L.; Ankney, Austin S. & Berguson, Timothy J.
Object Type: Report
System: The UNT Digital Library
An LTCC 94 GHz Antenna Array (open access)

An LTCC 94 GHz Antenna Array

An antenna array is designed in low-temperature cofired ceramic (LTCC) Ferro A6M{trademark} for a mm-wave application. The antenna is designed to operate at 94 GHz with a few percent bandwidth. A key manufacturing technology is the use of 3 mil diameter vias on a 6 mil pitch to construct the laminated waveguides that form the beamforming network and radiating elements. Measurements for loss in the laminated waveguide are presented. The slot-fed cavity-radiating element is designed to account for extremely tight mutual coupling between elements. The array incorporates a slot-fed multi-layer beamforming network.
Date: December 21, 2007
Creator: Aguirre, J; Pao, H; Lin, H; Garland, P; O'Neill, D & Horton, K
Object Type: Article
System: The UNT Digital Library
Comments on Worldsheet Theories Dual to Free Large N Gauge Theories (open access)

Comments on Worldsheet Theories Dual to Free Large N Gauge Theories

We continue to investigate properties of the worldsheet conformal field theories (CFTs) which are conjectured to be dual to free large N gauge theories, using the mapping of Feynman diagrams to the worldsheet suggested in [1]. The modular invariance of these CFTs is shown to be built into the formalism. We show that correlation functions in these CFTs which are localized on subspaces of the moduli space may be interpreted as delta-function distributions, and that this can be consistent with a local worldsheet description given some constraints on the operator product expansion coefficients. We illustrate these features by a detailed analysis of a specific four-point function diagram. To reliably compute this correlator we use a novel perturbation scheme which involves an expansion in the large dimension of some operators.
Date: March 21, 2007
Creator: Aharony, Ofer; /Weizmann Inst. /Stanford U., ITP /SLAC; David, Justin R.; Gopakumar, Rajesh; Inst., /Harish-Chandra Res.; Komargodski, Zohar et al.
Object Type: Report
System: The UNT Digital Library
The Moduli Space and M(Atrix) Theory of 9d N=1 Backgrounds of M/String Theory (open access)

The Moduli Space and M(Atrix) Theory of 9d N=1 Backgrounds of M/String Theory

We discuss the moduli space of nine dimensional N = 1 supersymmetric compactifications of M theory/string theory with reduced rank (rank 10 or rank 2), exhibiting how all the different theories (including M theory compactified on a Klein bottle and on a Moebius strip, the Dabholkar-Park background, CHL strings and asymmetric orbifolds of type II strings on a circle) fit together, and what are the weakly coupled descriptions in different regions of the moduli space. We argue that there are two disconnected components in the moduli space of theories with rank 2. We analyze in detail the limits of the M theory compactifications on a Klein bottle and on a Moebius strip which naively give type IIA string theory with an uncharged orientifold 8-plane carrying discrete RR flux. In order to consistently describe these limits we conjecture that this orientifold non-perturbatively splits into a D8-brane and an orientifold plane of charge (-1) which sits at infinite coupling. We construct the M(atrix) theory for M theory on a Klein bottle (and the theories related to it), which is given by a 2 + 1 dimensional gauge theory with a varying gauge coupling compactified on a cylinder with specific boundary conditions. We …
Date: March 21, 2007
Creator: Aharony, Ofer; /Weizmann Inst. /Stanford U., ITP /SLAC; Komargodski, Zohar; Patir, Assaf & Inst., /Weizmann
Object Type: Report
System: The UNT Digital Library
Catalytic partial oxidation reforming of hydrocarbon fuels. (open access)

Catalytic partial oxidation reforming of hydrocarbon fuels.

The polymer electrolyte fuel cell (PEFC) is the primary candidate as the power source for light-duty transportation systems. On-board conversion of fuels (reforming) to supply the required hydrogen has the potential to provide the driving range that is typical of today's automobiles. Petroleum-derived fuels, gasoline or some distillate similar to it, are attractive because of their existing production, distribution, and retailing infrastructure. The fuel may be either petroleum-derived or other alternative fuels such as methanol, ethanol, natural gas, etc. [1]. The ability to use a variety of fuels is also attractive for stationary distributed power generation [2], such as in buildings, or for portable power in remote locations. Argonne National Laboratory has developed a catalytic reactor based on partial oxidation reforming that is suitable for use in light-duty vehicles powered by fuel cells. The reactor has shown the ability to convert a wide variety of fuels to a hydrogen-rich gas at less than 800 C, temperatures that are several hundreds of degrees lower than alternative noncatalytic processes. The fuel may be methanol, ethanol, natural gas, or petroleum-derived fuels that are blends of various hydrocarbons such as paraffins, olefins, aromatics, etc., as in gasoline. This paper will discuss the results obtained …
Date: September 21, 1998
Creator: Ahmed, S.
Object Type: Article
System: The UNT Digital Library