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402 Matching Results
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Multiturn injection of EBIS ions in booster
Ions from EBIS are injected into Booster after acceleration by an RFQ and a Linac. The velocity of the ions at Booster injection is c{beta} where c is the velocity of light and (1) {beta} = 0.0655. The kinetic energy is (2) W = mc{sup 2}({gamma}-1) where m is the ion mass and (3) {gamma} = (1-{beta}{sup 2}){sup -1/2}. Putting in numbers one gets a kinetic energy of approximately 2 MeV per nucleon for each ion. The revolution period at injection is 10.276 {micro}s. The ions in the EBIS trap are delivered in a beam pulse that ranges from 10 to 40 {micro}s in length. This amounts to 1 to 4 turns around the machine. The transverse emittance (un-normalized) of EBIS beams just prior to injection into Booster is 11{pi} mm milliradians in both planes. This is an order of magnitude larger than the nominal 1{pi} mm milliradians for Tandem beams. Injection proceeds by means of an electrostatic inflector in the C3 straight section and four programmable injection dipoles in the C1, C3, C7, and D1 straights. These devices have been in use for many years for the injection of ions from Tandem as described in [1] and [2]. The …
Date:
September 1, 2010
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Simulations of Merging and Squeezing Bunches in Booster and AGS
N/A
Date:
September 1, 2012
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Simulations of RF Capture with Barrier Bucket in Booster at Injections
N/A
Date:
May 1, 2012
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
FY10 parameters for the injection, acceleration, and extraction of gold ions in booster, AGS, and RHIC
A Gold ion with charge eQ has N = 197 Nucleons, Z = 79 Protons, and (Z-Q) electrons. (Here Q is an integer and e is the charge of a single proton.) The mass is m = au - Qm{sub e} + E{sub b}/c{sup 2} (1) where a = 196.966552 is the relative atomic mass [1, 2] of the neutral Gold atom, u = 931.494013 MeV/c{sup 2} is the unified atomic mass unit [3], and m{sub e}c{sup 2} = .510998902 MeV is the electron mass [3]. E{sub b} is the binding energy of the Q electrons removed from the neutral Gold atom. This amounts to 0.332 MeV for the helium-like gold ion (Q = 77) and 0.517 MeV for the fully stripped ion. For the Au{sup 31+} ion we have E{sub b} = 13.5 keV. These numbers are given in Ref. [4].
Date:
August 1, 2010
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
FY08 parameters for the injection, acceleration, and extraction of gold ions and deuterons in the booster, AGS, and RHIC
A Gold ion with charge eQ has N = 197 Nucleons, Z = 79 Protons, and (Z-Q) electrons. (Here Q is an integer and e is the charge of a single proton.) The mass is m = au - Qm{sub e} + E{sub b}/c{sup 2} (1) where a = 196.966552 is the relative atomic mass [1, 2] of the neutral Gold atom, u = 931.494013 MeV/c{sup 2} is the unified atomic mass unit [3], and m{sub e}c{sup 2} = .510998902 MeV is the electron mass [3]. E{sub b} is the binding energy of the Q electrons removed from the neutral Gold atom. This amounts to 0.332 MeV for the helium-like gold ion (Q = 77) and 0.517 MeV for the fully stripped ion. For the Au{sup 31+} ion we have E{sub b} = 13.5 keV. These numbers are given in Ref. [4]. The deuteron mass [3] is 1875.612762(75) MeV/c{sup 2}.
Date:
August 1, 2010
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Injection of large transverse emittance EBIS beams in booster
N/A
Date:
November 1, 2011
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Notes on dumping gold beam in the AGS
Localized losses of gold beam in the AGS during RHIC Run 8 produced vacuum leaks which required the replacement of several vacuum chambers. A review of what happened and why was given by Leif Ahrens at the Run 8 Retreat. The following notes trace the subsequent development of clean dumping of gold beam on the beam dump in the J10 straight. The novel idea of stripping Au77+ ions in order to put them directly into the upstream face of the dump was introduced by Leif Ahrens and developed by all three of us. George Mahler made the actual stripping device and Dave Gassner developed its control. Leif Ahrens successfully commissioned the device with gold beam during Run 10. The reader may find it helpful to first view the figures herein and then refer to the text for details.
Date:
August 1, 2010
Creator:
Gardner, C. J.; Ahrens, L. & Thieberger, P.
Object Type:
Report
System:
The UNT Digital Library
Preliminary formation analysis for compressed air energy storage in depleted natural gas reservoirs : a study for the DOE Energy Storage Systems Program.
The purpose of this study is to develop an engineering and operational understanding of CAES performance for a depleted natural gas reservoir by evaluation of relative permeability effects of air, water and natural gas in depleted natural gas reservoirs as a reservoir is initially depleted, an air bubble is created, and as air is initially cycled. The composition of produced gases will be evaluated as the three phase flow of methane, nitrogen and brine are modeled. The effects of a methane gas phase on the relative permeability of air in a formation are investigated and the composition of the produced fluid, which consists primarily of the amount of natural gas in the produced air are determined. Simulations of compressed air energy storage (CAES) in depleted natural gas reservoirs were carried out to assess the effect of formation permeability on the design of a simple CAES system. The injection of N2 (as a proxy to air), and the extraction of the resulting gas mixture in a depleted natural gas reservoir were modeled using the TOUGH2 reservoir simulator with the EOS7c equation of state. The optimal borehole spacing was determined as a function of the formation scale intrinsic permeability. Natural gas reservoir …
Date:
June 1, 2013
Creator:
Gardner, William Payton
Object Type:
Report
System:
The UNT Digital Library
UNDERSTANDING FLOW OF ENERGY IN BUILDINGS USING MODAL ANALYSIS METHODOLOGY
It is widely understood that energy storage is the key to integrating variable generators into the grid. It has been proposed that the thermal mass of buildings could be used as a distributed energy storage solution and several researchers are making headway in this problem. However, the inability to easily determine the magnitude of the building’s effective thermal mass, and how the heating ventilation and air conditioning (HVAC) system exchanges thermal energy with it, is a significant challenge to designing systems which utilize this storage mechanism. In this paper we adapt modal analysis methods used in mechanical structures to identify the primary modes of energy transfer among thermal masses in a building. The paper describes the technique using data from an idealized building model. The approach is successfully applied to actual temperature data from a commercial building in downtown Boise, Idaho.
Date:
July 1, 2013
Creator:
Gardner, John; Heglund, Kevin; Wymelenberg, Kevin Van Den & Rieger, Craig
Object Type:
Article
System:
The UNT Digital Library
Joint Architecture Standard (JAS) Reliable Data Delivery Protocol (RDDP) specification.
The Joint Architecture Standard (JAS) program at Sandia National Laboratories requires the use of a reliable data delivery protocol over SpaceWire. The National Aeronautics and Space Administration at the Goddard Spaceflight Center in Greenbelt, Maryland, developed and specified a reliable protocol for its Geostationary Operational Environment Satellite known as GOES-R Reliable Data Delivery Protocol (GRDDP). The JAS program implemented and tested GRDDP and then suggested a number of modifications to the original specification to meet its program specific requirements. This document details the full RDDP specification as modified for JAS. The JAS Reliable Data Delivery Protocol uses the lower-level SpaceWire data link layer to provide reliable packet delivery services to one or more higher-level host application processes. This document specifies the functional requirements for JRDDP but does not specify the interfaces to the lower- or higher-level processes, which may be implementation-dependent.
Date:
May 1, 2011
Creator:
Enderle, Justin Wayne; Daniels, James W.; Gardner, Michael T.; Eldridge, John M.; Hunt, Richard D. & Gallegos, Daniel E.
Object Type:
Report
System:
The UNT Digital Library
[Funeral Program for Burl Franklin George Elison, July 1, 2010]
Funeral program for Burl Franklin George Ellison, born October 16, 1951 and died June 26, 2010. The funeral was held July 1, 2010 at Tried Stone Baptist Church, officiated by Reverend D. W. Brooks, Sr. Funeral arrangements were made through the D. W. Brooks Funeral Home and he was buried in St. Hedwig Cemetery in St. Hedwig, Texas.
Date:
July 1, 2010
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
Radiation Source Replacement Workshop
This report summarizes a Radiation Source Replacement Workshop in Houston Texas on October 27-28, 2010, which provided a forum for industry and researchers to exchange information and to discuss the issues relating to replacement of AmBe, and potentially other isotope sources used in well logging.
Date:
December 1, 2010
Creator:
Griffin, Jeffrey W.; Moran, Traci L. & Bond, Leonard J.
Object Type:
Report
System:
The UNT Digital Library
Site characterization methodology for deep borehole disposal.
None
Date:
September 1, 2012
Creator:
Vaughn, Palmer; Arnold, Bill Walter; Altman, Susan Jeanne; Brady, Patrick Vane & Gardner, William Payton
Object Type:
Report
System:
The UNT Digital Library
Science and Technology Review April/May 2013
None
Date:
March 1, 2013
Creator:
Simon, A J
Object Type:
Report
System:
The UNT Digital Library
Fielding the magnetically applied pressure-shear technique on the Z accelerator (completion report for MRT 4519).
The recently developed Magnetically Applied Pressure-Shear (MAPS) experimental technique to measure material shear strength at high pressures on magneto-hydrodynamic (MHD) drive pulsed power platforms was fielded on August 16, 2013 on shot Z2544 utilizing hardware set A0283A. Several technical and engineering challenges were overcome in the process leading to the attempt to measure the dynamic strength of NNSA Ta at 50 GPa. The MAPS technique relies on the ability to apply an external magnetic field properly aligned and time correlated with the MHD pulse. The load design had to be modified to accommodate the external field coils and additional support was required to manage stresses from the pulsed magnets. Further, this represents the first time transverse velocity interferometry has been applied to diagnose a shot at Z. All subsystems performed well with only minor issues related to the new feed design which can be easily addressed by modifying the current pulse shape. Despite the success of each new component, the experiment failed to measure strength in the samples due to spallation failure, most likely in the diamond anvils. To address this issue, hydrocode simulations are being used to evaluate a modified design using LiF windows to minimize tension in the …
Date:
September 1, 2013
Creator:
Alexander, C. Scott; Haill, Thomas A.; Dalton, Devon Gardner; Rovang, Dean Curtis & Lamppa, Derek C.
Object Type:
Report
System:
The UNT Digital Library
Proton beam lifetime increase with 10- and 12-pole correctors in the Relativistic Heavy Ion Collider
N/A
Date:
November 1, 2012
Creator:
Fischer, W.; Beebe-Wang, J.; Gu, X.; Luo, Y. & Nemesure, S.
Object Type:
Report
System:
The UNT Digital Library
Colloid-based multiplexed method for screening plant biomass-degrading glycoside hydrolase activities in microbial communities
The enzymatic hydrolysis of long-chain polysaccharides is a crucial step in the conversion of biomass to lignocellulosic biofuels. The identification and characterization of optimal glycoside hydrolases is dependent on enzyme activity assays, however existing methods are limited in terms of compatibility with a broad range of reaction conditions, sample complexity, and especially multiplexity. The method we present is a multiplexed approach based on Nanostructure-Initiator Mass Spectrometry (NIMS) that allowed studying several glycolytic activities in parallel under diverse assay conditions. Although the substrate analogs carried a highly hydrophobic perfluorinated tag, assays could be performed in aqueous solutions due colloid formation of the substrate molecules. We first validated our method by analyzing known {beta}-glucosidase and {beta}-xylosidase activities in single and parallel assay setups, followed by the identification and characterization of yet unknown glycoside hydrolase activities in microbial communities.
Date:
May 1, 2011
Creator:
Reindl, W.; Deng, K.; Gladden, J. M.; Cheng, G.; Wong, A.; Singer, S. W. et al.
Object Type:
Article
System:
The UNT Digital Library
Photovoltaic Module Reliability Workshop 2010: February 18-19, 2010
NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.
Date:
November 1, 2013
Creator:
Kurtz, J.
Object Type:
Report
System:
The UNT Digital Library
Viscosity of multi-component molten nitrate salts : liquidus to 200 degrees C.
The viscosity of molten salts comprising ternary and quaternary mixtures of the nitrates of sodium, potassium, lithium and calcium was determined experimentally. Viscosity was measured over the temperature range from near the relatively low liquidus temperatures of he individual mixtures to 200C. Molten salt mixtures that do not contain calcium nitrate exhibited relatively low viscosity and an Arrhenius temperature dependence. Molten salt mixtures that contained calcium nitrate were relatively more viscous and viscosity increased as the roportion of calcium nitrate increased. The temperature dependence of viscosity of molten salts containing calcium nitrate displayed curvature, rather than linearity, when plotted in Arrhenius format. Viscosity data for these mixtures were correlated by the Vogel-Fulcher- ammann-Hesse equation.
Date:
March 1, 2010
Creator:
Bradshaw, Robert W.
Object Type:
Report
System:
The UNT Digital Library
Phase transformation of PZST-86/14-5-2Nb ceramic under quasi-static loading conditions.
Specimens of poled and unpoled PZST ceramic were tested under hydrostatic loading conditions at temperatures of -55, 25, and 75 C. The objective of this experimental study was to obtain the electro-mechanical properties of the ceramic and the criteria of FE (Ferroelectric) to AFE (Antiferroelectric) phase transformations of the PZST ceramic to aid grain-scale modeling efforts in developing and testing realistic response models for use in simulation codes. As seen in previous studies, the poled ceramic from PZST undergoes anisotropic deformation during the transition from a FE to an AFE phase at -55 C. Warmer temperature tests exhibit anisotropic deformation in both the FE and AFE phase. The phase transformation is permanent at -55 C for all ceramics tests, whereas the transformation can be completely reversed at 25 and 75 C. The change in the phase transformation pressures at different temperatures were practically identical for both unpoled and poled PZST specimens. Bulk modulus for both poled and unpoled material was lowest in the FE phase, intermediate in the transition phase, and highest in the AFE phase. Additionally, bulk modulus varies with temperature in that PZST is stiffer as temperature decreases. Results from one poled-biased test for PZST and four poled-biased …
Date:
February 1, 2010
Creator:
Broome, Scott Thomas; Scofield, Timothy W.; Montgomery, Stephen Tedford; Bauer, Stephen J. & Hofer, John H.
Object Type:
Report
System:
The UNT Digital Library
Beyond Renewable Portfolio Standards: An Assessment of Regional Supply and Demand Conditions Affecting the Future of Renewable Energy in the West; Report and Executive Summary
This study assesses the outlook for utility-scale renewable energy development in the West once states have met their renewable portfolio standard (RPS) requirements. In the West, the last state RPS culminates in 2025, so the analysis uses 2025 as a transition point on the timeline of RE development. Most western states appear to be on track to meet their final requirements, relying primarily on renewable resources located relatively close to the customers being served. What happens next depends on several factors including trends in the supply and price of natural gas, greenhouse gas and other environmental regulations, consumer preferences, technological breakthroughs, and future public policies and regulations. Changes in any one of these factors could make future renewable energy options more or less attractive.
Date:
August 1, 2013
Creator:
Hurlbut, D. J.; McLaren, J. & Gelman, R.
Object Type:
Report
System:
The UNT Digital Library
SAPLE: Sandia Advanced Personnel Locator Engine.
We present the Sandia Advanced Personnel Locator Engine (SAPLE) web application, a directory search application for use by Sandia National Laboratories personnel. SAPLE's purpose is to return Sandia personnel 'results' as a function of user search queries, with its mission to make it easier and faster to find people at Sandia. To accomplish this, SAPLE breaks from more traditional directory application approaches by aiming to return the correct set of results while placing minimal constraints on the user's query. Two key features form the core of SAPLE: advanced search query interpretation and inexact string matching. SAPLE's query interpretation permits the user to perform compound queries when typing into a single search field; where able, SAPLE infers the type of field that the user intends to search on based on the value of the search term. SAPLE's inexact string matching feature yields a high-quality ranking of personnel search results even when there are no exact matches to the user's query. This paper explores these two key features, describing in detail the architecture and operation of SAPLE. Finally, an extensive analysis on logged search query data taken from an 11-week sample period is presented.
Date:
April 1, 2010
Creator:
Procopio, Michael J.
Object Type:
Report
System:
The UNT Digital Library
Supreme Court Appointment Process: President's Selection of a Nominee
This report discusses the process for appointing Supreme Court Justices. Each appointment to the nine-member Court is of consequence because of the enormous judicial power that the Court exercises, separate from, and independent of, the executive and legislative branches.
Date:
April 1, 2016
Creator:
McMillion, Barry J.
Object Type:
Report
System:
The UNT Digital Library
Gainesville Daily Register (Gainesville, Tex.), Vol. 128, No. 107, Ed. 1 Thursday, February 1, 2018
Daily newspaper from Gainesville, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 2018
Creator:
Armstrong, Mark J.
Object Type:
Newspaper
System:
The Portal to Texas History