Office of Scientific & Technical Information Technical Reports - 222 Matching Results

Search Results

Results: 1 - 24 next
open access

2004 Inorganic Chemistry Gordon Research Conference - July 18-23, 2004

Description: The Gordon Research Conference (GRC) on 2004 Inorganic Chemistry Gordon Research Conference - July 18-23, 2004 was held at Salve Regina College, July 18-23, 2004. The Conference was well-attended with 110 participants (attendees list attached). The attendees represented the spectrum of endeavor in this field coming from academia, industry, and government laboratories, both U.S. and foreign scientists, senior researchers, young investigators, and students. In designing the formal speakers progra… more
Date: September 16, 2005
Creator: Clark, David
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

2004 Mutagenesis Gordon Conference

Description: Mutations are genetic alterations that drive biological evolution and cause many, if not all, human diseases. Mutation originates via two distinct mechanisms: ''vertical'' variation is de novo change of one or few bases, whereas ''horizontal'' variation occurs by genetic recombination, which creates new mosaics of pre-existing sequences. The Mutagenesis Conference has traditionally focused on the generation of mutagenic intermediates during normal DNA synthesis or in response to environmental i… more
Date: September 16, 2005
Creator: Jinks-Robertson, Dr. Sue
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A 3d Parallel Beam Dynamics Code for Modeling High BrightnessBeams in Photoinjectors

Description: In this paper we report on IMPACT-T, a 3D beam dynamics code for modeling high brightness beams in photoinjectors and rf linacs. IMPACT-T is one of the few codes used in the photoinjector community that has a parallel implementation, making it very useful for high statistics simulations of beam halos and beam diagnostics. It has a comprehensive set of beamline elements, and furthermore allows arbitrary overlap of their fields. It is unique in its use of space-charge solvers based on an integrat… more
Date: May 16, 2005
Creator: Qiang, J.; Lidia, S.; Ryne, R. & Limborg, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Acceleration of Polarized Protons in the Ags With Two Helical Partial Snakes.

Description: The RHIC spin program requires 2 x 10{sup 11} proton/bunch with 70% polarization. As the injector to RHIC, AGS is the bottleneck for preserving polarization: there is no space for a full snake to overcome numerous depolarizing resonances. An ac dipole and a partial snake have been used to preserve beam polarization in the past few years. Two helical snakes have been built and installed in the AGS. With careful setup of optics at injection and along the ramp, this combination can eliminate all d… more
Date: May 16, 2005
Creator: Huang, H.; Ahrens, L.; Bai, M.; Brown, K.; Courant, E. D.; Gardner, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Active Transport of Nanomaterials Using Motor Proteins Final report for DOE-BES grant DE-FG03-03ER46024

Description: During the two year period of funding we have focused on the following topics: Guiding of microtubule movement on kinesin-coated, structured surfaces, directed assembly of oriented microtubule networks, and the interaction between synthetic materials and biological components in hybrid devices based on microtubules and kinesin motors. Additional efforts have been made and are still on- going in controlling the motor activity, and loading and unloading of cargo. In all aspects, the collaboration… more
Date: March 16, 2005
Creator: Hess, Henry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Adaption of Machine Fluid Analysis for Manufacturing - Final Report

Description: Pacific Northwest National Laboratory (PNNL: Operated by Battelle Memorial Institute for the Department of Energy) is working with the Department of Energy (DOE) to develop technology for the US mining industry. Filtration and lubricant suppliers to the pulp and paper industry had noted the recent accomplishments by PNNL and its industrial partners in the DOE OIT Mining Industry of the Future Program, and asked for assistance in adapting this DOE-funded technology to the pulp and paper industry. more
Date: August 16, 2005
Creator: Pardini, Allan F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beam-Based Alignment in the Rhic E-Cooling Solenoids.

Description: Accurate alignment of the electron and ion beams in the RHIC electron cooling solenoids is crucial for well-optimized cooling. Because of the greatly differing rigidities of the electron and ion beams, to achieve the specified alignment accuracy it is required that transverse magnetic fields resulting from imperfections in solenoid fabrication be down by five orders of magnitude relative to the pure solenoid fields. Shimming the solenoid field to this accuracy might be accomplished by survey te… more
Date: May 16, 2005
Creator: Cameron, P.; Ben-Zvi, Ilan; Dawson, W. C. & Al., Et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beam-Based Non-Linear Optics Corrections in Colliders.

Description: A method has been developed to measure and correct operationally the non-linear effects of the final focusing magnets in colliders, that gives access to the effects of multi-pole errors by applying closed orbit bumps, and analyzing the resulting tune and orbit shifts. This technique has been tested and used during 4 years of RHIC (the Relativistic Heavy Ion Collider at BNL) operations. I will discuss here the theoretical basis of the method, the experimental set-up, the correction results, the … more
Date: May 16, 2005
Creator: Pilat, R.; Luo, Y.; Malitsky, N. & Ptitsyn, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beam-Beam Simulations for Double-Gaussian Beams.

Description: Electron cooling together with intra-beam scattering results in a transverse distribution that can best be described by a sum of two gaussians, one for the high-density core and one for the tails of the distribution. Simulation studies are being performed to understand the beam-beam interaction of these double-gaussian beams. Here we report the effect of low-frequency random tune modulations on diffusion in double-gaussian beams and compare the effects to those in beam-beam interactions with re… more
Date: May 16, 2005
Creator: Montag, C.; Malitsky, N.; Ben-Zvi, Ilan & Litvinenko, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

BEAM-BEAM SIMULATIONS FOR THE ERHIC ELECTRON RING.

Description: To study collisions between polarized electrons and heavy ions or polarized protons at high energy, adding a 10 GeV electron storage ring to the existing RHIC facility is currently under consideration. To achieve high luminosities of several 10{sup 33} cm{sup -2} sec{sup -1} range, a vertical beam-beam tuneshift parameter of {zeta}{sub y} = 0.08 is required for the electron beam. Simulation studies are being performed to study the feasibility of this high tuneshift parameter and explore the pot… more
Date: May 16, 2005
Creator: Montag, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beam Induced Pressure Rise in Rhic.

Description: Beam induced pressure rise in RHIC warm sections is one of the machine luminosity limits. The RHIC electron cloud and the beam transition pressure rise are discussed. Countermeasures and studies for RHIC pressure rise and RHIC upgrade are reported.
Date: May 16, 2005
Creator: Zhang, S. Y.; Alessi, J.; Bai, M. & Al., Et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beam Loss Estimates and Control for the BNL Neutrino Facility.

Description: The requirement for low beam loss is very important both to protect the beam component, and to make the hands-on maintenance possible. In this report, the design considerations to achieving high intensity and low loss will be presented. We start by specifying the beam loss limit at every physical process followed by the proper design and parameters for realizing the required goals. The process considered in this paper include the emittance growth in the linac, the H{sup -} injection, the transi… more
Date: May 16, 2005
Creator: Weng, W. T.; Lee, Y. Y.; Raparia, D.; Tsoupas, N.; Beebe-Wang, J.; Wei, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Boost Converters for Gas Electric and Fuel Cell Hybrid Electric Vehicles

Description: Hybrid electric vehicles (HEVs) are driven by at least two prime energy sources, such as an internal combustion engine (ICE) and propulsion battery. For a series HEV configuration, the ICE drives only a generator, which maintains the state-of-charge (SOC) of propulsion and accessory batteries and drives the electric traction motor. For a parallel HEV configuration, the ICE is mechanically connected to directly drive the wheels as well as the generator, which likewise maintains the SOC of propul… more
Date: June 16, 2005
Creator: McKeever, JW
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of 200-UP-1 Aquifer Sediments and Results of Sorption-Desorption Tests Using Spiked Uncontaminated Groundwater

Description: Core characterization showed only 4 out of 13 core liner samples were intact samples and that the others were slough material. The intact samples showed typical Ringold Unit E characteristics such as being dominated by gravel and sand. Moderately reducing conditions are inferred in some core from borehole C4299. This reducing condition was caused by the hard tool process used to drill the wells. One core showed significant presence of ferric iron oxide/clay coatings on the gravels. There were n… more
Date: November 16, 2005
Creator: Um, Wooyong; Serne, R JEFFREY.; Bjornstad, Bruce N.; Schaef, Herbert T.; Brown, Christopher F.; Legore, Virginia L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of High-Temperature Laser-Produced Plasmas Using Thomson Scattering

Description: Ultraviolet Thomson scattering has been fielded at the Omega Laser Facility to achieve accurate measurements of the plasma conditions in laser-produced high-temperature plasmas. Recent applications to hohlraum targets that have been filled with CH gas or SiO{sub 2} foams have demonstrated a new high temperature plasma regime of importance to laser-plasma interaction studies in a strongly damped regime such as those occurring in indirect drive inertial confinement fusion experiments. The Thomson… more
Date: September 16, 2005
Creator: Glenzer, S H; Froula, D H; Ross, S; Niemann, C; Meezan, N & Divol, L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CHARACTERIZATION OF PLASTICALLY-INDUCED STRUCTURAL CHANGES IN A Zr-BASED BULK METALLIC GLASS USING POSITRON ANNIHILATION SPECTROCOPY

Description: Flow in metallic glasses is associated with stress-induced cooperative rearrangements of small groups of atoms involving the surrounding free volume. Understanding the details of these rearrangements therefore requires knowledge of the amount and distribution of the free volume and how that distribution evolves with deformation. The present study employs positron annihilation spectroscopy to investigate the free volume change in Zr{sub 58.5}Cu{sub 15.6}Ni{sub 12.8}Al{sub 10.3}Nb{sub 2.8} bulk m… more
Date: September 16, 2005
Creator: Flores, K M; Kanungo, B P; Glade, S C & Asoka-Kumar, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemistry and Materials Science 2004 Annual Report, Preview Edition

Description: Thriving from change is a constant element at LLNL. Through our commitment to scientific accomplishments, we have met the challenges posed by our evolving missions in 2004. It is the scientific breakthroughs that substantiate our strategic directions. Investments based on our strategic directions are bearing fruit, as illustrated in this preview of the 2004 Annual Report. We describe how our science is built around a strategic plan with four organizing themes: {sm_bullet} Materials properties a… more
Date: May 16, 2005
Creator: Shang, S; Diaz de la Rubia, T & Rennie, G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Chesapeake Laser Tracker in Industrial Metrology

Description: In the summer of 1992, the survey and alignment team at the Stanford Linear Accelerator Center acquired a CMS3000 laser tracker manufactured by Chesapeake Laser Systems in Lanham, Maryland. This paper gives a description of the principles of operation and calibration of the tracker. Several applications are explained and the results shared.
Date: August 16, 2005
Creator: Ruland, Robert E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

THE COLOR GLASS CONDENSATE: AN INTUITIVE DESCRIPTION.

Description: The author argues that the physics of the scattering of very high energy strongly interacting particles is controlled by a new, universal form of matter, the Color Glass Condensate. I motivate the existence of this matter and describe some of its properties.
Date: June 16, 2005
Creator: McLerran, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Community Climate System Model Project from an Interagency Perspective

Description: In 2007, the Intergovernmental Panel on Climate Change (IPCC) will publish its Fourth Assessment Report of the Scientific Basis of Climate Change (AR4). A significant portion of the AR4 will be the analysis of coupled general circulation model (GCM) simulations of the climate of the past century as well as scenarios of future climates under prescribed emission scenarios. Modeling groups worldwide have contributed to AR4, including three from the U.S., the Community Climate System Model (CCSM) p… more
Date: June 16, 2005
Creator: Bader, D C; Bamzai, A; Fein, J; Patrinos, A & Leinen, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

COMPACT SUPERCONDUCTING FINAL FOCUS MAGNET OPTIONS FOR THE ILC.

Description: The QD0 quadrupole, the final focus magnet closest to the Interaction Point (IP) for the ILC 20 m crossing angle layout, must provide strong focusing yet be adjustable to accommodate collision energy changes for energy scans and low energy calibration running. It must also be compact to allow disrupted beam and Beamstrahlung coming from the IP to pass outside into an independent instrumented beam line that leads to a high-power beam absorber. In designing QD0 we take advantage of recent BNZ, ex… more
Date: May 16, 2005
Creator: Parker, B.; Anerella, M.; Escallier, J.; Harrison, M.; He, P.; Jain, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of Microinstability Properties for Stellarator Magnetic Geometries

Description: The microinstability properties of seven distinct magnetic geometries corresponding to different operating and planned stellarators with differing symmetry properties are compared. Specifically, the kinetic stability properties (linear growth rates and real frequencies) of toroidal microinstabilities (driven by ion temperature gradients and trapped-electron dynamics) are compared, as parameters are varied. The familiar ballooning representation is used to enable efficient treatment of the spati… more
Date: June 16, 2005
Creator: Rewoldt, G.; Ku, L. P. & Tang, W. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

COMPARISON OF OFF-LINE IR BUMP AND ACTION-ANGLE KICK MINIMIZATION.

Description: The interaction region bump (IR bump) nonlinear correction method has been used for the sextupole and octupole field error on-line corrections in the Relativistic Heavy Ion Collider (RHIC) . Some differences were found for the sextupole and octupole corrector strengths between the on-line IR bump correction and the predictions from the action-angle kick minimization. In this article, we compare the corrector strengths from these two methods based on the RHIC Blue ring lattice with the IR nonlin… more
Date: May 16, 2005
Creator: Luo, Y.; Pilat, F.; Ptitsyn, V.; Trbojevic, D. & Wei, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen