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Jost, Elliott
Sandia National Laboratory (SNL-NM), Albuquerque, NM (United States). Funding organisation: USDOE National Nuclear Security Administration (NNSA) (United States)2018
Sandia National Laboratory (SNL-NM), Albuquerque, NM (United States). Funding organisation: USDOE National Nuclear Security Administration (NNSA) (United States)2018
AbstractAbstract
[en] At present, there are many methods to identify the temperature and phase of a material using invasive techniques. However, most current methods require physical contact or implicit methods utilizing light reflectance of the specimen. In this paper, we present a nondestructive inspection method using ultrasonic wave technology that circumvents these disadvantages to identify phase change regions and infer the temperature state of a material. In the present study an experiment is performed to monitor the time of flight within a wax as it undergoes melting and the subsequent cooling. Results presented in this work show a clear relationship between a material’s speed of sound and its temperature. The phase change transition of the material is clear from the time of flight results, and in the case of the investigated material, this change in the material state occurs over a range of temperatures. The range of temperatures over which the wax material melts is readily identified by speed of sound represented as a function of material temperature. The melt temperature, obtained acoustically, is validated using Differential Scanning Calorimetry (DSC), which uses shifts in heat flow rates to identify phase transition temperature ranges. Lastly, the investigated ultrasonic NDE method has direct applications in many industries, including oil and gas, food and beverage, and polymer composites, in addition to many implications for future capabilities of nondestructive inspection of multi-phase materials.
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SAND--2017-11254J; OSTIID--1429655; AC04-94AL85000; NA0003525; Available from https://www.osti.gov/pages/biblio/1429655; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1705.01121
Record Type
Journal Article
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1949; vp

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INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
May, M. J.; Beiersdorfer, P.; Jordan, N.; Scofield, J. H.; Reed, K. J.
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Funding organisation: USDOE (United States)2017
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Funding organisation: USDOE (United States)2017
AbstractAbstract
[en] We have measured the collisional excitation cross sections for the 3d→4f and 3d→5f excitations in Au ions near the Ni-like charge state by using beam plasmas created in the Livermore electron beam ion trap EBIT-I. The cross sections have been experimentally determined at approximately 1, 2 and 3 keV above the threshold energy, ET, for the 3d→4f excitations (ET ~2.5 keV) and at approximately 0.1, 1 and 2 keV above the threshold energy for the 3d→5f excitations (ET ~3.3 keV). The cross section measurements were made possible by using the GSFC x-ray microcalorimeter at the Livermore EBIT facility. The absolute cross sections are determined from the ratio of the intensity of the collisionally excited bound-bound transitions to the intensity of the radiative recombination lines produced in EBIT-I plasmas. The effects of polarization and Auger decay channels are accounted for in the cross section determination. Measured cross sections are compared with those from HULLAC, DWS and FAC calculations. Finally, the measurements demonstrate that some errors exist in the calculated excitation cross sections.
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Source
LLNL-JRNL--647513; OSTIID--1351130; AC52-07NA27344; Available from http://www.osti.gov/pages/biblio/1351130; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period
Record Type
Journal Article
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1811; vp

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Furletova, Yulia; Mantry, Sonny
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, Nuclear Physics - NP (SC-26) (United States)2018
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, Nuclear Physics - NP (SC-26) (United States)2018
AbstractAbstract
[en] A high intensity polarized positron beam, as part of the JLAB 12 GeV program and the proposed electron-ion collider (EIC), can provide a unique opportunity for testing the Standard Model (SM) and probing for new physics. The combination of high luminosity with polarized electrons and positrons incident on protons and deuterons can isolate important effects and distinguish between possible new physics scenarios in a manner that will complement current experimental efforts. Here, a comparison of cross sections between polarized electron and positron beams will allow for an extraction of the poorly known weak neutral current coupling combination 2C3u - C3d and would complement the proposed plan for a precision extraction of the combination 2C2u - Cd at the EIC. Precision measurements of these neutral weak couplings would constrain new physics scenarios including Leptoquarks, R-parity violating supersymmetry, and electron and quark compositeness. The dependence of the charged current cross section on the longitudinal polarization of the positron beam will provide an independent probe to test the chiral structure of the electroweak interactions. A polarized positron can probe charged lepton flavor violation (CLFV) through a search for e+ → τ+ transitions in a manner that is independent and complementary to the proposed e- → τ- search at the EIC. A positron beam incident on an electron in a stationary nuclear target will also allow for a dark-photon (A') search via the annihilation process e+ + e- → A' + γ.
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International Workshop on Physics with Positrons (JPOS17); Newport News, VA (United States); 12-15 Sep 2017; JLAB-PHY--18-2742; DOE-OR--23177-4468; OSTIID--1440970; AC05-06OR23177; Available from https://www.osti.gov/servlets/purl/1440970; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; DOE-OR--23177-4356' arXiv:1802.00266
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Journal Article
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Conference
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1970; vp

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ACCELERATORS, ALGEBRAIC CURRENTS, BEAMS, COLLISIONS, COMPOSITE MODELS, CURRENTS, ELECTRON COLLISIONS, ENERGY RANGE, FIELD THEORIES, GEV RANGE, GRAND UNIFIED THEORY, INTERACTIONS, ION COLLISIONS, LEPTON BEAMS, LINEAR ACCELERATORS, MATHEMATICAL MODELS, NEUTRAL CURRENTS, PARTICLE BEAMS, PARTICLE INTERACTIONS, PARTICLE MODELS, QUANTUM FIELD THEORY, QUARK MODEL, UNIFIED FIELD THEORIES, UNIFIED GAUGE MODELS
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Burkert, Volker D.
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, Nuclear Physics - NP (SC-26) (United States)
arXiv e-print [ PDF ]2018
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, Nuclear Physics - NP (SC-26) (United States)
arXiv e-print [ PDF ]2018
AbstractAbstract
[en] In this talk I address two high impact physics programs that require the use of polarized and unpolarized positron beams in addition to using electron beams of the same energy. First, I address what will be gained from using positron beams in addition to electron beams in the extraction of the Compton Form Factors (CFFs) and generalized parton distributions (GPDs) from Deeply Virtual Compton Scattering (DVCS) on a proton target. Furthermore a second high impact science program I discuss an experimental scenario using unpolarized positrons to measure elastic scattering on protons in an effort to determine definitively the 2-photon exchange contributions in order to resolve a longstanding discrepancy in the determination of the proton’s electric and magnetic form factors.
Primary Subject
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JPOS17: 2017 International Workshop on Physics with Positrons at Jefferson Lab; Newport News, VA (United States); 12-15 Sep 2017; JLAB-PHY--18-2635; DOE/OR--23177-4336; OSTIID--1462481; AC05-06OR23177; Available from https://www.osti.gov/servlets/purl/1462481; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1608.00175
Record Type
Journal Article
Literature Type
Conference
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1970; vp

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INIS VolumeINIS Volume
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External URLExternal URL
Rudd, Robert E.; Park, H.-S.; Cavallo, R. M.; Arsenlis, A.; Orlikowski, D. A.
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Funding organisation: USDOE (United States)2017
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Funding organisation: USDOE (United States)2017
AbstractAbstract
[en] Laser-driven ramp wave compression experiments have been used to investigate the strength (flow stress) of tantalum and other metals at high pressures and high strain rates. Recently this kind of experiment has been used to assess the dependence of the strength on the average grain size of the material, finding no detectable variation with grain size. The insensitivity to grain size has been understood theoretically to result from the dominant effect of the high dislocation density generated at the extremely high strain rates of the experiment. Here we review the experiments and describe in detail the multiscale strength model used to simulate them. The multiscale strength model has been extended to include the effect of geometrically necessary dislocations generated at the grain boundaries during compatible plastic flow in the polycrystalline metal. Lastly, we use the extended model to make predictions of the threshold strain rates and grain sizes below which grain size strengthening would be observed in the laser-driven Rayleigh-Taylor experiments.
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LLNL-JRNL--675719; OSTIID--1345315; AC52-07NA27344; Available from http://www.osti.gov/pages/biblio/1345315; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period
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Journal Article
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1793; vp

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Bjorgaard, Josiah August; Hammerberg, James Edward; Sheppard, Daniel Glen
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Funding organisation: USDOE Laboratory Directed Research and Development (LDRD) Program (United States)2018
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Funding organisation: USDOE Laboratory Directed Research and Development (LDRD) Program (United States)2018
AbstractAbstract
[en] Here, we present a density functional theory study of cerium deuterides, varying deuterium content and temperature. Results are discussed in relation to ejecta experiments recently described in [J. Dynam. Mat. Behav. 1, 12 (2017)]. Using quantum molecular dynamics, we calculate diffusion coefficients, radial distribution functions, and heat capacities of these materials. Properties are calculated over temperatures ranging from 500-4000K at near ambient pressure and at 2.37 fold compression. We find that deuterium diffusion occurs rapidly accross this temperature and compression region and that heat capacity calculations are in agreement with approximations made in experiments. For cerium metal, a comparison of self-diffusion coefficient and viscosity with experimental data and analytical models shows excellent agreement. Lastly, we discuss the stucture of cerium deuterides with respect to radial distribution functions and provide fitted equations for diffusion coefficients over temperature.
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SCCM17: 20. Biennial APS Conference on Shock Compression of Condensed Matter; St. Louis, MO (United States); 9-14 Jul 2017; OSTIID--1565845; AC52-06NA25396; Available from https://www.osti.gov/servlets/purl/1565845; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1906.04075
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Journal Article
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Conference
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1979; vp

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Brandt, T.
Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Science (United States)2002
Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Science (United States)2002
AbstractAbstract
No abstract available
Primary Subject
Source
9. International Symposium on Heavy Flavor Physics; Pasadena, CA (United States); 10-13 Sep 2001; SLAC-REPRINT--2002-197; AC03-76SF00515; AIP Conf.Proc.618:103-112,2002; Prepared for 9th International Symposium on Heavy Flavor Physics, Pasadena, CA (US), 09/10/2001--09/13/2001
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Journal Article
Literature Type
Conference
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; (Jan2002issue); [10 p.]

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Horn, Tanja
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, High Energy Physics (HEP) (SC-25) (United States)2018
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Funding organisation: USDOE Office of Science - SC, High Energy Physics (HEP) (SC-25) (United States)2018
AbstractAbstract
[en] Pions and kaons are, along with protons and neutrons, the main building blocks of nuclear matter. They are connected to the Goldstone modes of dynamical chiral symmetry breaking, the mechanism thought to generate all hadron mass in the visible universe. The distribution of the fundamental constituents, the quarks and gluons, is expected to be different in pions, kaons, and nucleons. However, experimental data are sparse. As a result, there has been persistent doubt about the behaviour of the pion's valence quark structure function at large Bjorken- and virtually nothing is known about the contribution of gluons. The Electron-Ion Collider (EIC) with an acceptance optimized for forward physics could provide access to structure functions over a larger kinematic region. This would allow for measurements testing if the origin of mass is encoded in the differences of gluons in pions, kaons, and nucleons, and measurements that could serve as a test of assumptions used in the extraction of structure functions and the pion and kaon form factors. Furthermore, measurements at an EIC would also allow to explore the effect of gluons at high x.
Primary Subject
Source
JPOS17: 2017 International Workshop on Physics with Positrons at Jefferson Lab; Newport News, VA (United States); 12-15 Sep 2017; JLAB-PHY--18-2628; DOE/OR--23177-4506; OSTIID--1462498; AC05-06OR23177; Available from https://www.osti.gov/servlets/purl/1462498; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1608.00175
Record Type
Journal Article
Literature Type
Conference
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; v. 1970; vp

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
McNulty, D.E.
Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Science (United States)2002
Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Science (United States)2002
AbstractAbstract
No abstract available
Primary Subject
Source
SLAC-REPRINT--2002-222; AC03-76SF00515; AIP Conf.Proc.549:647-650,2002; Prepared for 7th Conference on Intersections Between Particle and Nuclear Physics (CIPANP 2000), Quebec City, Quebec (CA), 05/22/2000--05/28/2000
Record Type
Journal Article
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; (Jan2002issue); [10 p.]

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Conradson, S.D.
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Stanford Synchrotron Radiation Lab. (United States). Funding organisation: USDOE Office of Science (United States)2001
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Stanford Synchrotron Radiation Lab. (United States). Funding organisation: USDOE Office of Science (United States)2001
AbstractAbstract
No abstract available
Primary Subject
Source
SLAC-REPRINT--2001-100; AC03-76SF00515
Record Type
Journal Article
Journal
AIP Conference Proceedings; ISSN 0094-243X;
; (1Jan2001issue); [v p.]

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