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Photon Colliders

Description: A photon collider interaction region has the possibility of expanding the physics reach of a future TeV scale electron-positron collider. A survey of ongoing efforts to design the required lasers and optics to create a photon collider is presented in this paper.
Date: October 7, 2002
Creator: Gronberg, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Picosecond 14.7 nm X-Ray Laser for Probing Matter Undergoing Rapid Changes

Description: With laser-driven tabletop x-ray lasers now operating in the efficient saturation regime, the source characteristics of high photon flux, high monochromaticity, picosecond pulse duration, and coherence are well-matched to many applications involving the probing of matter undergoing rapid changes. We give an overview of recent experiments at the Lawrence Livermore National Laboratory (LLNL) Compact Multipulse Terawatt (COMET) laser using the picosecond 14.7 nm x-ray laser as a compact, ultrafast… more
Date: October 7, 2002
Creator: Dunn, J.; Smith, R. F.; Nilsen, J.; Nelson, A. J.; Van Buuren, T. W.; Moon, S. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photoionization of Sc2+ ions by synchrotron radiation: Highresolution measurements and absolute cross sections in the photon energyrange 23-68 eV

Description: Cross sections for photoionization of doubly-chargedscandium ions has been measured using a merged-beams technique. Resultsare compared with the time-reversed process ofphotorecombination.
Date: October 7, 2002
Creator: Schippers, Stefan E.; Müller, A.; Ricz, S.; Bannister, M. E.; Dunn, G. H.; Schlachter, A. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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KTeV results: Re(e'/e) and rare decay results

Description: The KTeV physics program encompasses many goals including a precision measurement of the direct CP violation parameter Re({epsilon}{prime}/{epsilon}) in K{sub S,L} {yields} {pi}{pi} decays, and studies of rare neutral kaon decays. The KTeV detector collected data during the Fermilab fixed-target runs of 1996-97 and 1999. This article focuses on the precision measurement of the direct CP violation parameter Re({epsilon}{prime}/{epsilon}) using the 1996-97 data set. In addition, measurements of t… more
Date: October 7, 2002
Creator: Whitmore, Juliana
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Busted Butte Phase 2: Introduction and Analytical Modeling of Nonreactive Tracer and Lithium Breakthrough

Description: The Busted Butte Unsaturated-Zone Transport Test Facility is located approximately 8 km southeast of Yucca Mountain, and was designed to address uncertainties associated with flow and transport in the UZ site-process models for Yucca Mountain. Busted Butte Phase 2 consisted of a 10m x 10m x 7m test block. From July 1988 through October 2000, complex tracer mixtures were injected continuously at 77 discrete points located along eight parallel 10-m boreholes arranged in two horizontal planes. In … more
Date: October 7, 2002
Creator: Turin, H. J. & Soll, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Review of North American Neutrino Factory R and D

Description: We report here on the R and D program of the U.S. Neutrino Factory and Muon Collider Collaboration. Our effort includes work on targetry, muon ionization cooling, simulation work, and development of superconducting RF cavities. In addition, we are involved in the international effort toward a Muon Ionization Cooling Experiment (MICE). Recent activities in all these areas will be described.
Date: October 7, 2002
Creator: Zisman, Michael S. & Collaboration, Neutrino Factory and Muon Collider
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of Temperature and Electrolyte Composition on the Susceptibility of Alloy 22 to Localized Corrosion

Description: The study of the electrochemical behavior of Alloy 22 has been carried out in various concentrated environments using different sample configurations. Comparisons were made between the electrochemical behaviors of Alloy 22 in concentrated chloride solutions, and in concentrated chloride solutions with nitrate ions (NO{sub 3}{sup -}). In other experiments, the effect of fluoride ions (F{sup -}) was investigated. These comparative studies were performed at various temperatures. The rate of corros… more
Date: October 7, 2002
Creator: Day, S.D.; Evans, K.J. & Ilevbare, G.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low cost, compact, and high efficiency traction motor for electric and hybrid electric vehicles

Description: A new motor drive, the switched reluctance motor drive, has been developed for hybrid-electric vehicles. The motor drive has been designed, built and tested in the test bed at a near vehicle scale. It has been shown that the switched reluctance motor drive is more suitable for traction application than any other motor drive.
Date: October 7, 2002
Creator: Ehsani, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Busted Butte: Achieving the Objectives and Numerical Modeling Results

Description: The Unsaturated Zone Transport Test (UZTT) at Busted Butte is a mesoscale field/laboratory/modeling investigation designed to address uncertainties associated with flow and transport in the UZ site-process models for Yucca Mountain. The UZTT test facility is located approximately 8 km southeast of the potential Yucca Mountain repository area. The UZTT was designed in two phases, to address five specific objectives in the UZ: the effect of heterogeneities, flow and transport (F&T) behavior a… more
Date: October 7, 2002
Creator: Soll, W. E.; Kearney, M.; Stauffer, P.; Tseng, P.; Turin, H. J. & Lu, Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Determining worst-case fatigue thresholds for grain-bridging ceramics

Description: A method for determining worst-case cyclic fatigue thresholds in grain-bridging ceramics by quantifying the role of bridging is demonstrated for a model alumina. Crack-growth properties for both long and short (< 2 mm) cracks emanating from machined notches (root radii, (rho) {approx}; 15 - 150 (mu)m) were investigated. When compared as a function of the applied stress-intensity range (delta K), growth rates (da/dN) were far higher and fatigue thresholds (Delta)KTH were markedly lower with s… more
Date: October 7, 2002
Creator: Kruzic, J. J.; Yuan, R.; Canon, R. M. & Ritchie, R. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CDF Status and B Physics Prospects

Description: With extensive upgrades to the detector and electronics, CDF has started collecting data with Run II of the Tevatron. The enhanced silicon coverage and the use of silicon based tracks in the trigger, make CDF well suited for a broad program of B hadron measurements. We present the current status of the experiment and prospects for measurements in Run II.
Date: October 7, 2002
Creator: Miller, J. Stephen
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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B physics in Run II

Description: Run II at the Tevatron started on March 1, 2001 with a design instantaneous luminosity of 2 x 10{sup 32} cm{sup -2} s{sup -1}. The upgraded D0 detector is expected to collect 2 fb{sup -1} of data at {radical}s = 2.0 TeV in approximately 2 years. The D0 collaboration is planning to make measurements in a number of important areas of B physics, including sin(2{beta}), B{sub s} mixing, the {Lambda}{sub b} lifetime and rare B decays. In this note we describe the upgraded D0 detector and highlights … more
Date: October 7, 2002
Creator: Kuznetsov, Valentin E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Booster subharmonic RF capture design.

Description: The studies presented here indicate that a subharmonic system optimized using both 3rd and 12th subharmonic cavities (117.3 and 29.3 MHz) provides the minimum total gap voltage required to capture and accelerate a 15-ns linac macropulse at up to 10 nC with {+-} 1% energy spread. The simulations also show particle losses less than a part in 110,000 when including radiation damping, quantum excitation, and rf cavity beam loading. The only particle losses were found to be at injection due to phase… more
Date: October 7, 2002
Creator: Sereno, N. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The integration of web technology at ATLAS.

Description: ATLAS (Argonne Tandem Linear Accelerator System) accelerates heavy-ion elements, and consists of 2 separate ion source injectors, 64 superconducting resonators, and 3 target areas. As with any complex accelerator facility, database management systems are used extensively to support both the archival of operational data, and the realtime control needs of the accelerator. Web technology has recently been integrated into the already existing ATLAS Oracle Rdb database system and control system docu… more
Date: October 7, 2002
Creator: Quock, D.; Munson, F.; Raffenetti, R. & Enshiwat, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The status of Run II at Fermilab

Description: The Run II at Fermilab is progressing steadily. In the Run IIa scheme, 36 antiproton bunches collide with 36 proton bunches at CDF and D0 interaction regions in the Tevatron at 980 GeV beam energy. The current status and performance of the Fermilab Accelerator Complex is reviewed. The plans for Run IIb along with the Antiproton Source upgrade and incorporation of the Recycler Ring in the accelerator chain are outlined. The prospects of achieving Run II integrated luminosity goal of 15 fb{sup -1… more
Date: October 7, 2002
Creator: Gounder, Krish
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SU(2) lattice gauge theory at nonzero chemical potential and temperature.

Description: SU(2) lattice gauge theory with four flavors of quarks is simulated at nonzero chemical potential {mu} and temperature T and the results are compared to the predictions of Effective Lagrangians. Simulations on 16{sup 4} lattices indicate that at zero T the theory experiences a second order phase transition to a diquark condensate state which is well described by mean field theory. Nonzero T and {mu} are studied on 12{sup 3} x 6 lattices. For low T, increasing {mu} takes the system through a lin… more
Date: October 7, 2002
Creator: Kogut, J. B.; Toublan, D. & Sinclair, D. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Injector-Amplifier Design for Tabletop Ne-Like X-Ray Lasers

Description: We report new results using the LLNL COMET laser to evaluate the effectiveness of different target architectures to improve the output and characteristics of the transient x-ray laser scheme. Surprising observations were found when the laser line focus irradiating a single slab Cr or Fe target was divided into two or three distinct plasma column sections with millimeter scale gaps between each plasma. The Ne-like 3p {sup 1}S{sub 0} {yields} 3s {sup 1}P{sub 1} 28.5 nm and 25.5 nm x-ray laser lin… more
Date: October 7, 2002
Creator: Dunn, J.; Osterheld, A. L.; Faenov, A. Ya.; Pikuz, T. A. & Shlyaptsev, V. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Size-Segregated Aerosol Composition and Mass Loading of Atmospheric Particles as Part of the Pacific Northwest 2001 (PNW2001) Air Quality Study in Puget Sound, WA

Description: Size and composition are key factors in determining the impact aerosols have on global climate change and human health. The DELTA group at UC Davis has developed sampling techniques that allow continuous collection of aerosols separated into 8 different size fractions with 1-hour time resolution. Total aerosol mass determination: Scanning Transmission Ion Microscopy (STIM) with a 3 MeV proton beam can produce profiles of aerosol mass with an error limit of less than 10%. The aerosol collection … more
Date: October 7, 2002
Creator: Disselkamp, R S; Barrie, L; Shutthanandan, S; Cliff, S S; Cahill, T A & Bench, G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Annual Report - Remotely Operated NDE System for Inspection of Hanford's Waste Tank Knuckle Regions and Development of a Small Roving Annulus Inspection Vehicle T-SAFT Scanning Bridge for Savannah River Site Applications

Description: The design, development, and performance testing of a prototype system known as the Remotely Operated Nondestructive Examination (RONDE)system to examine the knuckle region of a Hanford DST have been completed. The design and fabrication of a scanning bridge to support the Savannah River Site utilizing similar technology was also completed.
Date: October 7, 2002
Creator: Pardini, Allan F.; Crawford, Susan L.; Harris, Robert V.; Samuel, Todd J.; Roberts, Ron A.; Alzheimer, James M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Foreign Support of the U.S. War on Terrorism

Description: In response to the terrorist attacks against the United States on September 11, 2001, a number of countries and organizations pledged various forms of support to the United States in its campaign against the Al Qaeda network and the Taliban in Afghanistan. This report summarizes support for the U.S. war against terrorism from open source material.
Date: October 7, 2002
Creator: Bockman, Johanna; Marshall, Meaghan; Sandhu, Anjula & Hildreth, Steven A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental Influence on Passive Films Formed on Alloy 22

Description: The passive corrosion rate of Alloy 22 is exceptionally low in a wide range of aqueous solutions, temperatures and electrochemical potentials, Alloy 22 contains approximately 22% chromium (Cr) by weight; thus, it forms a Cr-rich passive film in most environments. Very little is known about the composition, thickness and other properties of this passive film. The aim of this research was to determine the general characteristics of the oxide film that forms on Alloy 22, as a function of solution … more
Date: October 7, 2002
Creator: Szmodis, A W; Anderson, K L; Farmer, J C; Lian, T & Orme, C A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theoretical Investigation of Field-Line Quality in a Driven Spheromak

Description: Theoretical studies aimed at predicting and diagnosing field-line quality in a spheromak are described. These include nonlinear 3-D MHD simulations, stability studies, analyses of confinement in spheromaks dominated by either open (stochastic) field lines or approximate flux surfaces, and a theory of fast electrons as a probe of field-line length.
Date: October 7, 2002
Creator: Cohen, R. H.; Berj, H.; Cohen, B. I.; Fowler, T. K.; Glasser, A. H.; Hooper, E. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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