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Manifestation of the Color Glass Condensate in Particle Production at RHIC.

Description: In this paper we discuss the experimental signatures of the new form of nuclear matter--the Color Glass Condensate (CGC) in particle production at RHIC. We show that predictions for particle production in p(d)A and AA collisions derived from these properties are in agreement with data collected at RHIC.
Date: July 26, 2004
Creator: Tuchin, K.
Partner: UNT Libraries Government Documents Department
open access

Simultaneous imaging of the near- and far-field intensity distributions of the Ni-like Sn X-ray laser

Description: We report on 2D near-field imaging experiments of the 11.9-nm Sn X-ray laser that were performed with a set of novel Mo/Y multilayer mirrors having reflectivities of up to {approx}45% at normal and at 45 incidence. Second-moment analysis of the X-ray laser emission was used to determine values of the X-ray beam propagation factor M{sup 2} for a range of irradiation parameters. The results reveal a reduction of M{sup 2} with increasing prepulse amplitude. The spatial size of the output is a fact… more
Date: July 26, 2004
Creator: Staub, F; Braud, M; Balmer, J E; Nilsen, J & Bajt, S
Partner: UNT Libraries Government Documents Department
open access

NEW WEB-BASED ACCESS TO NUCLEAR STRUCTURE DATASETS.

Description: As part of an effort to migrate the National Nuclear Data Center (NNDC) databases to a relational platform, a new web interface has been developed for the dissemination of the nuclear structure datasets stored in the Evaluated Nuclear Structure Data File and Experimental Unevaluated Nuclear Data List.
Date: September 26, 2004
Creator: WINCHELL,D. F.
Partner: UNT Libraries Government Documents Department
open access

Adaptive Sampling for Noisy Problems

Description: The usual approach to deal with noise present in many real-world optimization problems is to take an arbitrary number of samples of the objective function and use the sample average as an estimate of the true objective value. The number of samples is typically chosen arbitrarily and remains constant for the entire optimization process. This paper studies an adaptive sampling technique that varies the number of samples based on the uncertainty of deciding between two individuals. Experiments dem… more
Date: March 26, 2004
Creator: Cantu-Paz, E
Partner: UNT Libraries Government Documents Department
open access

NUCLEAR SCIENCE REFERENCES AS A TOOL FOR DATA EVALUATION.

Description: For several decades, the Nuclear Science References database has been maintained as a tool for data evaluators and for the wider pure and applied research community. This contribution will describe the database and recent developments in web-based access.
Date: September 26, 2004
Creator: WINCHELL,D. F.
Partner: UNT Libraries Government Documents Department
open access

Electron-Cloud Simulation and Theory for High-Current Heavy-Ion Beams

Description: Stray electrons can arise in positive-ion accelerators for heavy ion fusion or other applications as a result of ionization of ambient gas or gas released from walls due to halo-ion impact, or as a result of secondary- electron emission. We summarize the distinguishing features of electron cloud issues in heavy-ion-fusion accelerators and a plan for developing a self-consistent simulation capability for heavy-ion beams and electron clouds. We also present results from several ingredients in thi… more
Date: July 26, 2004
Creator: Cohen, R; Friedman, A; Lund, S; Molvik, A; Lee, E; Azevedo, T et al.
Partner: UNT Libraries Government Documents Department
open access

Automatic Blocking Of QR and LU Factorizations for Locality

Description: QR and LU factorizations for dense matrices are important linear algebra computations that are widely used in scientific applications. To efficiently perform these computations on modern computers, the factorization algorithms need to be blocked when operating on large matrices to effectively exploit the deep cache hierarchy prevalent in today's computer memory systems. Because both QR (based on Householder transformations) and LU factorization algorithms contain complex loop structures, few co… more
Date: March 26, 2004
Creator: Yi, Q; Kennedy, K; You, H; Seymour, K & Dongarra, J
Partner: UNT Libraries Government Documents Department
open access

Development of LLNL Methodology for Nonnuclear Safety Bases

Description: The objective of this paper is to introduce the process and philosophies used to develop LLNL methodology for performing nonnuclear safety bases. Our former approach needed revision in order to implement the new Work Smart Standard (WSS), 'Safety Basis Requirements for Nonnuclear Facilities at Lawrence Livermore National Laboratory Site Specific Standard' (UCRL-ID-150214), approved in 2003 and revised January, 2004. This work relates directly to the following workshop theme: 'Improvements in Ch… more
Date: April 26, 2004
Creator: van Warmerdam, C M & Pinkston, D M
Partner: UNT Libraries Government Documents Department
open access

High concentration suspended sediment measurments using acontinuous fiber optic in-stream transmissometer

Description: Suspended sediment loads mobilized during high flow periods in rivers and streams are largely uncharacterized. In smaller and intermittent streams, a large storm may transport a majority of the annual sediment budget. Therefore monitoring techniques that can measure high suspended sediment concentrations at semi-continuous time intervals are needed. A Fiber optic In-stream Transmissometer (FIT) is presented for continuous measurement of high concentration suspended sediment in storm runoff. FIT… more
Date: May 26, 2004
Creator: Campbell, Chris G.; Laycak, Danny T.; Hoppes, William; Tran,Nguyen T. & Shi, Frank G.
Partner: UNT Libraries Government Documents Department
open access

The Mechanical and Thermal Design for the MICE Detector Solenoid Magnet System

Description: The detector solenoid for MICE surrounds a scintillating fiber tracker that is used to analyze the muon beam within the detector. There are two detector magnets for measuring the beam emittance entering and leaving the cooling channel that forms the central part of the experiment. The field in the region of the fiber detectors must be from 2.8 to 4 T and uniform to better than 1 percent over a volume that is 300 mm in diameter by 1000 mm long. The portion of the detector magnet that is around t… more
Date: September 26, 2004
Creator: Fabbricatore, P.; Farinon, S.; Perrella, M.; Bravar, U. & Green, M. A.
Partner: UNT Libraries Government Documents Department
open access

Active control for turbulent premixed flame simulations

Description: Many turbulent premixed flames of practical interest are statistically stationary. They occur in combustors that have anchoring mechanisms to prevent blow-off and flashback. The stabilization devices often introduce a level of geometric complexity that is prohibitive for detailed computational studies of turbulent flame dynamics. As a result, typical detailed simulations are performed in simplified model configurations such as decaying isotropic turbulence or inflowing turbulence. In these conf… more
Date: March 26, 2004
Creator: Bell, John B.; Day, Marcus S.; Grcar, Joseph F. & Lijewski, Michael J.
Partner: UNT Libraries Government Documents Department
open access

Heavy flavor production at the Tevatron

Description: Using a subset of the current Run II data, the CDF and D0 have performed several measurements on heavy flavor production. In this paper, we present a new measurement of prompt charm meson production by CDF. We also report the latest CDF II measurements of inclusive J/{Psi} production and b-production without requirement of minimum transverse momentum on J/{Psi} and b-quark. They are the first measurements of the total inclusive J/{Psi} and b quark cross section in the central rapidity region at… more
Date: February 26, 2004
Creator: Chen, Chunhui
Partner: UNT Libraries Government Documents Department
open access

Virtual data in CMS production

Description: Initial applications of the GriPhyN Chimera Virtual Data System have been performed within the context of CMS Production of Monte Carlo Simulated Data. The GriPhyN Chimera system consists of four primary components: (1) a Virtual Data Language, which is used to describe virtual data products, (2) a Virtual Data Catalog, which is used to store virtual data entries, (3) an Abstract Planner, which resolves all dependencies of a particular virtual data product and forms a location and existence ind… more
Date: August 26, 2004
Creator: Arbree, A.
Partner: UNT Libraries Government Documents Department
open access

MCRUNJOB: A High energy physics workflow planner for grid production processing

Description: McRunjob is a powerful grid workflow manager used to manage the generation of large numbers of production processing jobs in High Energy Physics. In use at both the DZero and CMS experiments, McRunjob has been used to manage large Monte Carlo production processing since 1999 and is being extended to uses in regular production processing for analysis and reconstruction. Described at CHEP 2001, McRunjob converts core metadata into jobs submittable in a variety of environments. The powerful core m… more
Date: August 26, 2004
Creator: Graham, Gregory E.
Partner: UNT Libraries Government Documents Department
open access

Rating energy efficiency and sustainability in laboratories: Results and lessons from the Labs21 program

Description: Laboratories are very energy intensive, with significant opportunities for improved efficiency. However, their inherent complexity and variety makes benchmarking of their energy and environmental performance a unique and challenging task. Furthermore, laboratories have a myriad of health and safety requirements that significantly affect energy use, adding complexity to their benchmarking. The Labs21 program, a joint program of the US EPA and US DOE, has developed two resources specifically for … more
Date: May 26, 2004
Creator: Mathew, Paul; Sartor, Dale; van Geet, Otto & Reilly, Sue
Partner: UNT Libraries Government Documents Department
open access

Neptunium Disposal to the Savannah River Site Tank Farm

Description: Researchers investigated the neutralization of an acidic neptunium solution from a Savannah River Site (SRS) processing canyon and the properties of the resulting slurry to determine the feasibility of disposal in the SRS tank farm. The acidic solution displayed no properties that precluded the proposed disposal route. Neutralization of the acidic neptunium forms a 4 wt per cent slurry of precipitated metal hydroxides. The insoluble solids consist largely of iron (92 per cent) and neptunium hyd… more
Date: February 26, 2004
Creator: Walker, D. D.
Partner: UNT Libraries Government Documents Department
open access

Quantum leaps in philosophy of mind: Reply to Bourget'scritique

Description: David Bourget has raised some conceptual and technical objections to my development of von Neumann's treatment of the Copenhagen idea that the purely physical process described by the Schroedinger equation must be supplemented by a psychophysical process called the choice of the experiment by Bohr and Process 1 by von Neumann. I answer here each of Bourget's objections.
Date: July 26, 2004
Creator: Stapp, Henry P.
Partner: UNT Libraries Government Documents Department
open access

The Madden-Julian Oscillation in the National Center for Atmospheric Research Community Atmospheric Model-2 with the Tiedtke Convective Scheme

Description: The boreal winter Madden-Julian oscillation (MJO) remains very weak and irregular in structure in the National Center for Atmospheric Research (NCAR) Community Atmosphere Model version 2 (CAM2) as in its direct predecessor, the Community Climate Model version 3 (CCM3). The standard version of CAM2 uses the deep convective scheme of Zhang and McFarlane (1995), as in CCM3, with the closure dependent on convective available potential energy (CAPE). Here, sensitivity tests using several versions of… more
Date: July 26, 2004
Creator: Liu, P; Wang, B; Sperber, K R; Li, T & Meehl, G A
Partner: UNT Libraries Government Documents Department
open access

DEPENDENCY OF SULFATE SOLUBILITY ON MELT COMPOSITION AND MELT POLYMERIZATION

Description: Sulfate and sulfate salts are not very soluble in borosilicate waste glass. When sulfate is present in excess it can form water soluble secondary phases and/or a molten salt layer (gall) on the melt pool surface which is purported to cause steam explosions in slurry fed melters. Therefore, sulfate can impact glass durability while formation of a molten salt layer on the melt pool can impact processing. Sulfate solubility has been shown to be compositionally dependent in various studies, (e.g. ,… more
Date: July 26, 2004
Creator: JANTZEN, CAROLM.
Partner: UNT Libraries Government Documents Department
open access

The CMS integration grid testbed

Description: The CMS Integration Grid Testbed (IGT) comprises USCMS Tier-1 and Tier-2 hardware at the following sites: the California Institute of Technology, Fermi National Accelerator Laboratory, the University of California at San Diego, and the University of Florida at Gainesville. The IGT runs jobs using the Globus Toolkit with a DAGMan and Condor-G front end. The virtual organization (VO) is managed using VO management scripts from the European Data Grid (EDG). Gridwide monitoring is accomplished usin… more
Date: August 26, 2004
Creator: Graham, Gregory E.
Partner: UNT Libraries Government Documents Department
open access

Pentaquark Searches at CDF

Description: Experimental results of a search for the {Xi}{sub 3/2}(1860) cascade pentaquark state in data collected with the CDF 2 Detector in Run II at the Tevatron are presented. No evidence for these states in the neutral {Xi}{sup -}{pi}{sup +} and doubly charged {Xi}{sup -}{pi}{sup -} modes has been found. Preliminary upper limits on yields at 1862 MeV/c{sup 2} relative to the well established resonance {Xi}*(1530){sup 0} are presented.
Date: August 26, 2004
Creator: Gorelov, Igor V.
Partner: UNT Libraries Government Documents Department
open access

Stochastic algorithms for the analysis of numerical flame simulations

Description: Recent progress in simulation methodologies and high-performance parallel computers have made it is possible to perform detailed simulations of multidimensional reacting flow phenomena using comprehensive kinetics mechanisms. As simulations become larger and more complex, it becomes increasingly difficult to extract useful information from the numerical solution, particularly regarding the interactions of the chemical reaction and diffusion processes. In this paper we present a new diagnostic t… more
Date: April 26, 2004
Creator: Bell, John B.; Day, Marcus S.; Grcar, Joseph F. & Lijewski, Michael J.
Partner: UNT Libraries Government Documents Department
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