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The Hunt for New Physics at the Large Hadron Collider
None
Date:
July 9, 2013
Creator:
Nath, Pran; Nelson, Brent D.; Davoudiasl, Hooman; Dutta, Bhaskar; Feldman, Daniel; Liu, Zuowei et al.
System:
The UNT Digital Library
LSST Science Book, Version 2.0
None
Date:
July 9, 2013
Creator:
Abell, Paul A.; Allison, Julius; Anderson, Scott F.; Andrew, John R.; Angel, J.; Roger, P. et al.
System:
The UNT Digital Library
Measurements of the Gate Tuned Superfluid Density in Superconducting LaAlO3/SrTiO3
None
Date:
July 9, 2013
Creator:
Bert, Julie A.; Nowack, Katja C.; Kalisky, Beena; Noad, Hilary; Kirtley, John R.; Bell, Chris et al.
System:
The UNT Digital Library
Physics Design of a 28 GHz Electron Heating System for the National Spherical Torus Experiment Upgrade
A megawatt-level, 28 GHz electron heating system is being designed to support non-inductive (NI) plasma current (I{sub p}) start-up and local heating and current drive (CD) in H-mode discharges in the National Spherical Torus Experiment Upgrade (NSTX-U). The development of fully NI I{sub p} start-up and ramp-up is an important goal of the NSTX-U research program. 28 GHz electron cyclotron (EC) heating is predicted to rapidly increase the central electron temperature (T{sub e}(0)) of low density NI plasmas generated by Coaxial Helicity Injection (CHI). The increased T{sub e}(0) will significantly reduce the Ip decay rate of CHI plasmas, allowing the coupling of fast wave heating and neutral beam injection. Also 28 GHz electron Bernstein wave (EBW) heating and CD can be used during the I{sub p} flat top in NSTX-U discharges when the plasma is overdense. Ray tracing and Fokker-Planck numerical simulation codes have been used to model EC and EBW heating and CD in NSTX-U. This paper presents a pre-conceptual design for the 28 GHz heating system and some of the results from the numerical simulations.
Date:
July 9, 2013
Creator:
Taylor, G.; Bertelli, N.; Ellis, R. A.; Gerhardt, S. P.; Harvey, R. W.; Hosea, J. C. et al.
System:
The UNT Digital Library
Readiness of the ATLAS Liquid Argon Calorimeter for LHC Collisions
None
Date:
July 9, 2013
Creator:
Aad, G & /Marseille, CPPM /Oklahoma U. /Barcelona, IFAE /Geneva U. /Oxford U. /Baku, Inst. Phys. /Oklahoma State U. /Michigan State U. /Tel Aviv U. /Orsay, LAL /ICTP, Trieste /INFN, Udine /Brookhaven /Hampton U. /Yale U. /Calabria U. /INFN, Cosenza /Queen Mary, U. of London /Rutherford /Brandeis U. /CAFPE, Granada
System:
The UNT Digital Library
RESEARCH AND DEVELOPMENT ACTIVITIES AT SAVANNAH RIVER SITE'S H CANYON FACILITY
The Savannah River Site's (SRS) H Canyon Facility is the only large scale, heavily shielded, nuclear chemical separations plant still in operation in the U.S. The facility's operations historically recovered uranium-235 (U-235) and neptunium-237 (Np-237) from aluminum-clad, enriched-uranium fuel tubes from Site nuclear reactors and other domestic and foreign research reactors. Today the facility, in conjunction with HB Line, is working to provide the initial feed material to the Mixed Oxide Facility also located on SRS. Many additional campaigns are also in the planning process. Furthermore, the facility has started to integrate collaborative research and development (R&D) projects into its schedule. H Canyon can serve as the appropriate testing location for many technologies focused on monitoring the back end of the fuel cycle, due to the nature of the facility and continued operation. H Canyon, in collaboration with the Savannah River National Laboratory (SRNL), has been working with several groups in the DOE complex to conduct testing demonstrations of novel technologies at the facility. The purpose of conducting these demonstrations at H Canyon will be to demonstrate the capabilities of the emerging technologies in an operational environment. This paper will summarize R&D testing activities currently taking place in H Canyon …
Date:
July 9, 2013
Creator:
Sexton, L. & Fuller, Kenneth
System:
The UNT Digital Library
The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes
None
Date:
July 9, 2013
Creator:
Sanchez-Conde, Miguel A.; Paneque, David; Bloom, Elliott D.; Prada, Francisco & Dominguez, Alberto
System:
The UNT Digital Library
Simulation of Experiments on Passive Focusing of TNSA-Produced Proton Beams
None
Date:
July 9, 2013
Creator:
Cohen, R H; Yuen, A; Belli, C; Lund, S M & Ni, P A
System:
The UNT Digital Library
Stop the Top Background of the Stop Search
None
Date:
July 9, 2013
Creator:
Bai, Yang; Cheng, Hsin-Chia; Gallicchio, Jason & Gu, Jiayin
System:
The UNT Digital Library
Upward-facing Lithium Flash Evaporator for NSTX-U
NSTX plasma performance has been significantly enhanced by lithium conditioning [1]. To date, the lower divertor and passive plates have been conditioned by downward facing lithium evaporators (LITER) as appropriate for lower null plasmas. The higher power operation expected from NSTX-U requires double null plasma operation in order to distribute the heat flux between the upper and lower divertors making it desirable to coat the upper divertor region with Li as well. An upward aiming LITER (U-LITER) is presently under development and will be inserted into NSTX-U using a horizontal probe drive located in a 6" upper midplane port. In the retracted position the evaporator will be loaded with up to 300 mg of Li granules utilizing one of the calibrated NSTX Li powder droppers[2]. The evaporator will then be inserted into the vessel in a location within the shadow of the RF limiters and will remain in the vessel during the discharge. About 10 seconds before a discharge, it will be rapidly heated and the lithium completely evaporated onto the upper divertor, thus avoiding the complication of a shutter that prevents evaporation during the shot when the diagnostic shutters are open. The minimal time interval between the evaporation and …
Date:
July 9, 2013
Creator:
Roquemore, A. L.
System:
The UNT Digital Library
APPLICATIONS OF CURRENT TECHNOLOGY FOR CONTINUOUS MONITORING OF SPENT FUEL
Advancements in technology have opened many opportunities to improve upon the current infrastructure surrounding the nuclear fuel cycle. Embedded devices, very small sensors, and wireless technology can be applied to Security, Safety, and Nonproliferation of Spent Nuclear Fuel. Security, separate of current video monitoring systems, can be improved by integrating current wireless technology with a variety of sensors including motion detection, altimeter, accelerometer, and a tagging system. By continually monitoring these sensors, thresholds can be set to sense deviations from nominal values. Then alarms or notifications can be activated as needed. Safety can be improved in several ways. First, human exposure to ionizing radiation can be reduced by using a wireless sensor package on each spent fuel cask to monitor radiation, temperature, humidity, etc. Since the sensor data is monitored remotely operator stay-time is decreased and distance from the spent fuel increased, so the overall radiation exposure is reduced as compared to visual inspections. The second improvement is the ability to monitor continuously rather than periodically. If changes occur to the material, alarm thresholds could be set and notifications made to provide advanced notice of negative data trends. These sensor packages could also record data to be used for scientific …
Date:
June 9, 2013
Creator:
Drayer, R.
System:
The UNT Digital Library
The Average Star Formation Histories of Galaxies in Dark Matter Halos from z = 0-8
Presents a method to constrain average galaxy star formation rates, star formation histories, and the intracluster light as a function of halo mass.
Date:
May 9, 2013
Creator:
Behroozi, Peter S.; Wechsler, Risa H. & Conroy, Charlie
System:
The UNT Digital Library
Brightness and Coherence of Synchrotron Radiation and FELs
None
Date:
May 9, 2013
Creator:
Huang, Zhirong
System:
The UNT Digital Library
Early Experiences With The OpenMP Accelerator Model
None
Date:
May 9, 2013
Creator:
Liao, C.; Yan, Y.; de Supinsky, B.; Quinlan, D. & Chapman, B.
System:
The UNT Digital Library
Microbunched Electron Cooling for Hadrons
None
Date:
May 9, 2013
Creator:
Ratner, Daniel
System:
The UNT Digital Library
RECAP: Toast of the Town Salutes Robert Godwin and "Austin Faces of Philanthropy"
Article about the Toast of the Town event celebrating Robert Godwin and his book, "Austin Faces of Philanthropy 1976-2012."
Date:
May 9, 2013
Creator:
Smothers, Kevin
System:
The UNT Digital Library
Array of Virtual Frisch-Grid CZT Detectors with Common Cathode Readout for Correcting Charge Trapping and Rejecting Incomplete Charge Collection
N/A
Date:
April 9, 2013
Creator:
A., Bolotnikov
System:
The UNT Digital Library
BNLs Synchrotron-radiation Research Hub for Characterizing Detection Materials and Devices for the NA22 Community
N/A
Date:
April 9, 2013
Creator:
Camarda, S. G.; Bolotnikov, A. E.; Cui, Y.; Hossain, A.; Roy, U.; Yang, G. et al.
System:
The UNT Digital Library
Can Ionic Liquids Be Used As Templating Agents For Controlled Design of Uranium-Containing Nanomaterials?
Nanostructured uranium oxides have been prepared in ionic liquids as templating agents. Using the ionic liquids as reaction media for inorganic nanomaterials takes advantage of the pre-organized structure of the ionic liquids which in turn controls the morphology of the inorganic nanomaterials. Variation of ionic liquid cation structure was investigated to determine the impact on the uranium oxide morphologies. For two ionic liquid cations, increasing the alkyl chain length increases the aspect ratio of the resulting nanostructured oxides. Understanding the resulting metal oxide morphologies could enhance fuel stability and design.
Date:
April 9, 2013
Creator:
Visser, A.; Bridges, N. & Tosten, M.
System:
The UNT Digital Library
CdTeSe Crystals for Gamma-Ray Detectors
N/A
Date:
April 9, 2013
Creator:
U., Roy; James, R. B.; Kim, K. H. & Bolotnikov, A. E.
System:
The UNT Digital Library
Comments Regarding "Density, Speed of Sound, Refractive Index and Derivatives Properties of the Binary Mixture N-Hexane + N-Heptane (or N-Octane or N-Nonane), T = 288.15 - 313.15 K"
This article offers comment on "Density, speed of sound, refractive index and derivatives properties of the binary mixture N-Hexane + N-Heptane (or N-Octane or N-Nonane), T=288.15 - 313.15 K."
Date:
April 9, 2013
Creator:
Acree, William E. (William Eugene) & Stephens, Timothy W.
System:
The UNT Digital Library
A Comparative Study of High-Performance Computing on the Cloud
None
Date:
April 9, 2013
Creator:
Marathe, A.; Harris, R.; Lowenthal, D.; de Supinski, B.; Rountree, B.; Schulz, M. et al.
System:
The UNT Digital Library
Experimental Demonstration of Femtosecond Two-Color X-Ray Free-Electron Lasers
None
Date:
April 9, 2013
Creator:
Lutman, A. A.; Coffee, R.; Ding, Y.; Huang, Z.; Krzywinski, J.; Maxwell, T. et al.
System:
The UNT Digital Library
Femtosecond x-ray free electron laser pulse duration measurement from spectral correlation function
None
Date:
April 9, 2013
Creator:
Lutman, A. A.; Ding, Y.; Feng, Y.; Huang, Z.; Messerschmidt, M.; Wu, J. et al.
System:
The UNT Digital Library