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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
JTAC News (Stephenville, Tex.), Ed. 1 Monday, September 16, 2013
Student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
September 16, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
International Clean Energy Coalition
In 2003, the National Association of Regulatory Utility Commissioners (NARUC) and National Energy Technology Laboratories (NETL) collaboratively established the International Clean Energy Coalition (ICEC). The coalition consisting of energy policy-makers, technologists, and financial institutions was designed to assist developing countries in forming and supporting local approaches to greenhouse gas mitigation within the energy sector. ICEC's work focused on capacity building and clean energy deployment in countries that rely heavily on fossil-based electric generation. Under ICEC, the coalition formed a steering committee consisting of NARUC members and held a series of meetings to develop and manage the workplan and define successful outcomes for the projects. ICEC identified India as a target country for their work and completed a country assessment that helped ICEC build a framework for discussion with Indian energy decisionmakers including two follow-on in-country workshops. As of the conclusion of the project in 2010, ICEC had also conducted outreach activities conducted during United Nations Framework Convention on Climate Change (UNFCCC) Ninth Conference of Parties (COP 9) and COP 10. The broad goal of this project was to develop a coalition of decision-makers, technologists, and financial institutions to assist developing countries in implementing affordable, effective and resource appropriate technology and …
Date:
September 28, 2010
Creator:
Skootsky, Erin; Gardner, Matt & Flansburgh, Bevan
Object Type:
Report
System:
The UNT Digital Library
Robust pricing of transportation networks under uncertainty
"This project will develop these models, which will be suitable either to determine the best pricing policies to maximize revenue or minimize congestion, or to evaluate alternative toll policies according to these metrics."
Date:
September 2010
Creator:
Gardner, Lauren Marie; Waller, S. Travis & Boyles, Stephen D.
Object Type:
Report
System:
The Portal to Texas History
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
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
Ultra Low Density and Highly Crosslinked Biocompatible Shape Memory Polyurethane Foams
None
Date:
September 15, 2011
Creator:
Singhal, P.; Rodriguez, J. N.; Small, W., IV; Eagleaston, S.; De Water, J. V.; Maitland, D. J. et al.
Object Type:
Article
System:
The UNT Digital Library
RHIC Performance for FY2011 Au+Au Heavy Ion Run
Following the Fiscal Year (FY) 2010 (Run-10) Relativistic Heavy Ion Collider (RHIC) Au+Au run, RHIC experiment upgrades sought to improve detector capabilities. In turn, accelerator improvements were made to improve the luminosity available to the experiments for this run (Run-11). These improvements included: a redesign of the stochastic cooling systems for improved reliability; a relocation of 'common' RF cavities to alleviate intensity limits due to beam loading; and an improved usage of feedback systems to control orbit, tune and coupling during energy ramps as well as while colliding at top energy. We present an overview of changes to the Collider and review the performance of the collider with respect to instantaneous and integrated luminosity goals. At the conclusion of the FY 2011 polarized proton run, preparations for heavy ion run proceeded on April 18, with Au+Au collisions continuing through June 28. Our standard operations at 100 GeV/nucleon beam energy was bracketed by two shorter periods of collisions at lower energies (9.8 and 13.5 GeV/nucleon), continuing a previously established program of low and medium energy runs. Table 1 summarizes our history of heavy ion operations at RHIC.
Date:
September 4, 2011
Creator:
Marr, G.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blackler, I.; Blaskiewicz, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Science and Technology Review October/November 2010
None
Date:
September 13, 2010
Creator:
Blobaum, K. J.
Object Type:
Report
System:
The UNT Digital Library
The Supreme Court's Overruling of Constitutional Precedent
This report examines how the Supreme Court determines whether to overrule its prior decisions on questions of constitutional law. It provides an overview of the doctrine of stare decisis, under which a court generally follows rules adopted in prior decisions; discusses how Justices who have adopted textualism and originalism handle conflicts between precedent and their judicial philosophies; and examines various factors that the Court weighs when interpreting the Constitution, providing examples from the Court's recent jurisprudence.
Date:
September 24, 2018
Creator:
Murrill, Brandon J.
Object Type:
Report
System:
The UNT Digital Library
Gainesville Daily Register (Gainesville, Tex.), Vol. 128, No. 11, Ed. 1 Thursday, September 14, 2017
Daily newspaper from Gainesville, Texas that includes local, state, and national news along with advertising.
Date:
September 14, 2017
Creator:
Armstrong, Mark J.
Object Type:
Newspaper
System:
The Portal to Texas History
2012 Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
This Research is about Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies which presents a preliminary model of the three-dimensional seismic structure of the Iran region.
Date:
September 10, 2012
Creator:
Wetovsky, Marvin A.; Anderson, Dale; Arrowsmith, Stephen J.; Begnaud, Michael L.; Hartse, Hans E.; Maceira, Monica et al.
Object Type:
Article
System:
The UNT Digital Library
Parental stressor exposure simultaneously conveys both adaptive and maladaptive larval phenotypes through epigenetic inheritance in the zebrafish (Danio rerio)
This article is a study using crude oil as an example of an environmental stressor in adult zebrafish. The offspring obtained were then assessed for transgenerational epigenetic transfer of oil-induced phenotypes. The authors conclude that epigenetic transgenerational inheritance can lead to an immediate and simultaneous inheritance of both beneficial and maladaptive traits in a large proportion of the F1 larvae. The adaptive responses may help fish populations survive when facing transient environmental stressors.
Date:
September 5, 2019
Creator:
Bautista, Naim M. & Burggren, Warren W.
Object Type:
Article
System:
The UNT Digital Library
Trade Adjustment Assistance (TAA) and Its Role in U.S. Trade Policy
This report discusses the role of Trade Adjustment Assistance (TAA) in U.S. trade policy, from its inception as a legislative option in the early 1950s, to its core role as an alternative to import relief that many argue has served to promote the long-term U.S. trade liberalization agenda. It will also consider the extent to which TAA has been linked to both renewal of trade agreements authority, and passage of trade agreement implementing legislation.
Date:
September 28, 2011
Creator:
Hornbeck, J.F. & Rover, Laine Elise
Object Type:
Report
System:
The UNT Digital Library
Effect of atmosphere on collinear double-pulse laser-induced breakdown spectroscopy
Double pulse laser induced breakdown spectroscopy (DP-LIBS) has been shown to enhance LIBS spectra. Several researches have reported significant increases in signal-to-noise and or spectral intensity [1-4]. In addition to DP-LIBS, atmospheric conditions can also increase spectra intensity. For example, Iida [5] found that He and Ar both increase LIBS intensity compared to air at one 1 atm. It was also found that as the pressure was decreased to 100 Torr, LIBS intensity increased in Ar and air for single pulse (SP) LIBS. In this study, a collinear DP-LIBS scheme is used along with manipulation of the atmospheric conditions. The DP-LIBS scheme consists of a 355 nm ablative pulse fired into a sample contained in a vacuum chamber. A second analytical 1064 nm pulse is then fired 100 ns to 10 µs after and along the same path of the first pulse. Ar, He and air at pressures ranging from atmospheric pressure (630 Torr at elevation) to 10-5 Torr are introduced during DP-LIBS and SP-LIBS experiments. For a brass sample, a significant increase in spectral intensity of Cu and Zn lines were observed in DP-LIBS under Ar compared to DP-LIBS in air (Figure 1). It was also found that Cu …
Date:
September 1, 2010
Creator:
Effenberger, Andrew J., Jr. & Scott, Jill R.
Object Type:
Article
System:
The UNT Digital Library
Compatibility Study for Plastic, Elastomeric, and Metallic Fueling Infrastructure Materials Exposed to Aggressive Formulations of Isobutanol-blended Gasoline
This report talks about Compatibility Study for Plastic, Elastomeric, and Metallic Fueling Infrastructure Materials Exposed to Aggressive Formulations of Isobutanol-blended Gasoline
Date:
September 1, 2013
Creator:
Kass, Michael D.; Janke, Christopher James; Pawel, Steven J.; Thomson, Jeffery K.; Meyer, Harry M., III & Theiss, Timothy J.
Object Type:
Report
System:
The UNT Digital Library
Powering Africa: Challenges of and U.S. Aid for Electrification in Africa
This report discusses the Power Africa initiative; policy problems and challenges related to power sector development in Africa; long-term perspectives on energy poverty, need, and future development; and raises some possible oversight questions and issues for Congress.
Date:
September 14, 2015
Creator:
Cook, Nicolas; Campbell, Richard J.; Brown, Phillip & Ratner, Michael
Object Type:
Report
System:
The UNT Digital Library
Observation of snake resonances at Relativistic Heavy Ion Collider
The Siberian snakes are powerful tools in preserving polarization in high energy accelerators has been demonstrated at the Brookhaven Relativistic Heavy Ion Collider (RHIC). Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to 100 GeV. However, the Siberian snakes also introduce a new set of depolarization resonances, i.e. snake resonances as first discovered by Lee and Tepikian. The intrinsic spin resonances above 100 GeV are about a factor of two stronger than those below 100 GeV which raises the challenge to preserve the polarization up to 250 GeV. In 2009, polarized protons collided for the first time at the RHIC design store energy of 250 GeV. This paper presents the experimental measurements of snake resonances at RHIC. The plan for avoiding these resonances is also presented.
Date:
September 27, 2010
Creator:
Bai, M.; Ahrens, L.; Alekseev, I.G.; Alessi, J. & al, et
Object Type:
Article
System:
The UNT Digital Library
Gluons and the quark sea at high energies: distributions, polarization, tomography
This report is based on a ten-week program on Gluons and the quark sea at high-energies, which took place at the Institute for Nuclear Theory (INT) in Seattle in Fall 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics (QCD). This report is organized around the following four major themes: (i) the spin and flavor structure of the proton, (ii) three dimensional structure of nucleons and nuclei in momentum and configuration space, (iii) QCD matter in nuclei, and (iv) Electroweak physics and the search for physics beyond the Standard Model. Beginning with an executive summary, the report contains tables of key measurements, chapter overviews for each of the major scientific themes, and detailed individual contributions on various aspects of the scientific opportunities presented by an EIC.
Date:
September 30, 2011
Creator:
Boer, D.; Venugopalan, R.; Diehl, M.; Milner, R.; Vogelsang, W. & al., et
Object Type:
Report
System:
The UNT Digital Library
Status Review Report of 82 Candidate Coral Species Petitioned Under The U.S. Endangered Species Act
Report on the status review of 83 species of coral in relation to their status as threatened or endangered based on the criteria set by the Endangered Species Act.
Date:
September 2011
Creator:
Brainard, Russell E.; Birkeland, Charles; Eakin, C. Mark; McElhany, Paul; Miller, Margaret W.; Patterson, Matt et al.
Object Type:
Report
System:
The UNT Digital Library
Journal of Applied Rehabilitation Counseling, Volume 44, Number 3, Fall 2013
Access:
Use of this item is restricted to the UNT Community
Official, quarterly journal of the National Rehabilitation Counseling Association (NRCA) containing articles, opinions, and research in professional rehabilitation counseling regarding the needs of individuals employed in a wide variety of work settings and with wide-ranging professional interests.
Date:
September 2013
Creator:
National Rehabilitation Counseling Association (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Texas Journal of Women, Gender, and the Law, Volume 24, Number 1, Fall 2014
Biannual journal containing articles, notes, and other analyses of legal, social, and political issues related to women and gender.
Date:
September 2014
Creator:
University of Texas at Austin. School of Law.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Sweetwater Reporter (Sweetwater, Tex.), Vol. 113, No. 258, Ed. 1 Thursday, September 15, 2011
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
September 15, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History