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Charm physics at CDF II

Description: The CDF II detector has the capability of triggering on displaced tracks. Because of this ability, CDF II has accrued large samples of charged meson decays to fully hadronic final states in 64 pb{sup -1} of p{bar p} collision data gathered at {radical}s = 1.96 TeV. Using initial Run II data samples, the production cross sections for J/{psi}, D{sup 0}, D{sup +}, D*{sup +} and D{sub s}{sup +} mesons have been measured. Ratios of branching ratios for Cabibbo suppressed final states and CP asymmetr… more
Date: October 28, 2003
Creator: Furic, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Radiofrequency Separator For High-Energy Particles

Description: This report is an outgrowth of the MURA Users' Conference of June 1959. At that conference the group on beam separators discussed the problem of whether particle separation could be achieved at the machine energies under consideration. A preliminary version of the scheme outlined here was given at the conference. Later, after flaws were discovered, it was modified. The attempt is not to show that this is the way it should be done, but to show with reasonable certainty that there is at least one… more
Date: October 28, 1959
Creator: Good, Myron L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of the neutron damage on electronics at the National Ignition Facility

Description: The NIF environment is very complex leading to a large and non trivial radiation background. A shield surrounding the electronics is required to lower the neutron background to less than 1e7 n/cm{sup 2}. Moving electronics to behind the 6 foot-thick target bay wall is the best shield.
Date: October 28, 2010
Creator: Dauffy, L S; Mcnaney, J M & Khater, H Y
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of Asymmetric Optical Pumping of Ions Accelerating in a Magnetic-field Gradient

Description: We report observations of asymmetric optical pumping of argon ions accelerating in a magnetic field gradient. The signature is a difference in the laser-induced-fluorescence (LIF) emission amplitude from a pair of Zeeman-split states. A model that reproduces the dependence of the asymmetry on magnetic-field and ion-velocity gradients is described. With the model, the fluorescence intensity ratio provides a new method of measuring ion collisionality. This phenomenon has implications for interpre… more
Date: October 28, 2004
Creator: Sun, Xuan; Scime, Earl; Miah, Mahmood; Cohen, Samuel & Skiff, Frederick
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Observation of amplification of a 1ps pulse by SRS of a 1 ns pulse in a plasma with conditions relevant to pulse compression

Description: The compression of a laser pulse by amplification of an ultra short pulse beam which seeds the stimulated Raman scatter of the first beam has been long been discussed in the context of solid and gas media. We investigate the possibility of using intersecting beams in a plasma to compress nanosecond pulses to picosecond duration by scattering from driven electron waves. Recent theoretical studies have shown the possibility of efficient compression with large amplitude, non-linear Langmuir waves … more
Date: October 28, 2005
Creator: Kirkwood, R K; Dewald, E; Wilks, S C; Meezan, N; Niemann, C; Divol, L et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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HADES, A Code for Simulating a Variety of Radiographic Techniques

Description: It is often useful to simulate radiographic images in order to optimize imaging trade-offs and to test tomographic techniques. HADES is a code that simulates radiography using ray tracing techniques. Although originally developed to simulate X-Ray transmission radiography, HADES has grown to simulate neutron radiography over a wide range of energy, proton radiography in the 1 MeV to 100 GeV range, and recently phase contrast radiography using X-Rays in the keV energy range. HADES can simulate p… more
Date: October 28, 2004
Creator: Aufderheide, Maurice B.; Henderson, Gary; Schach von Wittenau, Alexis E.; Slone, Dale M.; Barty, Anton & Martz, Harry E., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Scaling and performance of a 3-D radiation hydrodynamics code on message-passing parallel computers: final report

Description: This report details an investigation into the efficacy of two approaches to solving the radiation diffusion equation within a radiation hydrodynamic simulation. Because leading-edge scientific computing platforms have evolved from large single-node vector processors to parallel aggregates containing tens to thousands of individual CPU's, the ability of an algorithm to maintain high compute efficiency when distributed over a large array of nodes is critically important. The viability of an algor… more
Date: October 28, 1999
Creator: Hayes, J C & Norman, M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Decommissioning of the Tokamak Fusion Test Reactor

Description: The Tokamak Fusion Test Reactor (TFTR) at the Princeton Plasma Physics Laboratory was operated from 1982 until 1997. The last several years included operations with mixtures of deuterium and tritium. In September 2002, the three year Decontamination and Decommissioning (D&D) Project for TFTR was successfully completed. The need to deal with tritium contamination as well as activated materials led to the adaptation of many techniques from the maintenance work during TFTR operations to the D&… more
Date: October 28, 2003
Creator: Perry, E.; Chrzanowski, J.; Gentile, C.; Parsells, R.; Rule, K.; Strykowsky, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The First Decommissioning of a Fusion Reactor Fueled by Deuterium-Tritium

Description: The Tokamak Fusion Test Reactor (TFTR) at the Plasma Physics Laboratory of Princeton University (PPPL) was the first fusion reactor fueled by a mixture of deuterium and tritium (D-T) to be decommissioned in the world. The decommissioning was performed over a period of three years and was completed safely, on schedule, and under budget. Provided is an overview of the project and detail of various factors which led to the success of the project. Discussion will cover management of the project, en… more
Date: October 28, 2003
Creator: Gentile, Charles A.; Perry, Erik; Rule, Keith; Williams, Michael; Parsells, Robert; Viola, Michael et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

H-Mode Turbulence, Power Threshold, ELM, and Pedestal Studies in NSTX

Description: High-confinement mode (H-mode) operation plays a crucial role in NSTX [National Spherical Torus Experiment] research, allowing higher beta limits due to reduced plasma pressure peaking, and long-pulse operation due to high bootstrap current fraction. Here, new results are presented in the areas of edge localized modes (ELMs), H-mode pedestal physics, L-H turbulence, and power threshold studies. ELMs of several other types (as observed in conventional aspect ratio tokamaks) are often observed: (… more
Date: October 28, 2004
Creator: Maingi, R.; Bush, C. E.; Fredrickson, E. D.; Gates, D. A.; Kaye, S. M.; LeBlanc, B. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Liquid Lithium Limiter Experiments in CDX-U

Description: Recent experiments in the Current Drive Experiment-Upgrade provide a first-ever test of large area liquid lithium surfaces as a tokamak first wall, to gain engineering experience with a liquid metal first wall, and to investigate whether very low recycling plasma regimes can be accessed with lithium walls. The CDX-U is a compact (R = 34 cm, a = 22 cm, B{sub toroidal} = 2 kG, I{sub P} = 100 kA, T{sub e}(0) = 100 eV, n{sub e}(0) {approx} 5 x 10{sup 19} m{sup -3}) spherical torus at the Princeton … more
Date: October 28, 2004
Creator: Majeski, R.; Jardin, S.; Kaita, R.; Gray, T.; Marfuta, P.; Spaleta, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced ST Plasma Scenario Simulations for NSTX

Description: Integrated scenario simulations are done for NSTX [National Spherical Torus Experiment] that address four primary milestones for developing advanced ST configurations: high {beta} and high {beta}{sub N} inductive discharges to study all aspects of ST physics in the high-beta regime; non-inductively sustained discharges for flattop times greater than the skin time to study the various current-drive techniques; non-inductively sustained discharges at high {beta} for flattop times much greater tha… more
Date: October 28, 2004
Creator: Kessel, C.E.; Synakowski, E.J.; Gates, D.A.; Harvey, R.W.; Kaye, S.M.; Mau, T.K. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Report of the APS Neutrino Study Reactor Working Group

Description: The worldwide program to understand neutrino oscillations and determine the neutrino mixing parameters, CP violating effects, and mass hierarchy will require a broad combination of measurements. The group believes that a key element of this future neutrino program is a multi-detector neutrino experiment (with baselines of {approx} 200 m and {approx} 1.5 km) with a sensitivity of sin{sup 2} 2{theta}{sub 13} = 0.01. In addition to oscillation physics, the reactor experiment may provide interestin… more
Date: October 28, 2004
Creator: Abouzaid, E.; Anderson, K.; Barenboim, G.; Berger, B.; Blucher, E.; Bolton, T. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The equivalence principle of quantum mechanics: Uniqueness theorem

Description: Recently the authors showed that the postulated diffeomorphic equivalence of states implies quantum mechanics. This approach takes the canonical variables to be dependent by the relation p = {partial_derivative}{sub q}S{sub 0} and exploits a basic GL(2,C)-symmetry which underlies the canonical formalism. In particular, they looked for the special transformations leading to the free system with vanishing energy. Furthermore, they saw that while on the one hand the equivalence principle cannot be… more
Date: October 28, 1997
Creator: Faraggi, A.E. & Matone, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

National Ignition Facility subsystem design requirements target diagnostics subsystem SSDR 1.8.3

Description: This SSDR establishes the performance, design, development and test requirements for the Target Experimental System`s Diagnostic, WBS 1.8. 3. This includes the individual diagnostic components, the Target Diagnostic Data Acquisition System (Target DAS), the diagnostic vacuum system, the timing/fiducial system, and the EMI protection system.
Date: October 28, 1996
Creator: Lee, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Science& Technology Review December 2002

Description: This issue has the following articles: (1) ''Doing It All: Sustaining Our Working Solutions, Rising to New Challenges''; (2) ''Emerging from the Cold War: Stockpile Stewardship and Beyond''--When the Cold War ended, Lawrence Livermore stepped up to a new national challenge--maintaining the safety and reliability of the U.S. nuclear stockpile without underground testing. (3) ''Machines from Interlocking Molecules''--Fundamental chemistry and physics research will enable scientists to control and… more
Date: October 28, 2002
Creator: Budil, K S
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries Government Documents Department
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Neutron Spectroscopy by Double Scatter and Associated Particle Techniques.

Description: Multiple detectors can provide [1,2] both directional and spectroscopic information. Neutron spectra may be obtained by neutron double scatter (DSNS), or the spontaneous fission associated particle (AP) technique. Spontaneous fission results in the creation of fission fragments and the release of gamma rays and neutrons. As these occur at the same instant, they are correlated in time. Thus gamma ray detection can start a timing sequence relative to a neutron detector where the time difference i… more
Date: October 28, 2007
Creator: Dioszegi, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Manipulation of high-current pulses for heavy-ion fusion

Description: For efficient induction-driven heavy-ion fusion, the current profile along a pulse must be modified in a non-selfsimilar manner between the accelerator and the target. In the accelerator, the pulse should have a duration of at least 50 ns in order to make efficient use of the induction cores, and the current should by nearly uniform along the pulse to minimize the aperture. In contrast, the optimal current profile on target consists of a main pulse of about 10 ns preceded by a longer low-curren… more
Date: October 28, 1996
Creator: Sharp, W. M.; Callahan, D. A.; Griedman, A. & Grote, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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