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Investigating the potential for long-term permeable reactive barrier (PRB) monitoring from the electrical signatures associated with the reduction in reactive iron performance

Description: The objective of this work was to conduct laboratory and field experiments to determine the sensitivity of low frequency electrical measurements (resistivity and induced polarization) to the processes of corrosion and precipitation that are believed to limit permeable reactive barrier (PRB) performance. The research was divided into four sets of experiments that were each written up and submitted to a peer-reviewed journal: [1] A laboratory experiment to define the controls of aqueous chemistry… more
Date: December 14, 2005
Creator: Slater, Lee D.; Korte, N. & Baker, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RIKEN BNL RESEARCH CENTER WORKSHOP ON HIGH ENERGY POLARIMETRY, VOLUME 23

Description: The RHIC collider, in its pp mode, will be a unique machine. It will open up a new frontier in the use of spin in the study of hadronic physics. Using its polarized beams, a whole new range of tests of the Standard Model will become feasible, and much new information about the detailed partonic structure of-the nucleon will emerge. It will also be possible to answer intriguing questions concerning the relationship between pp and pp total cross-sections and real parts of forward amplitudes, ques… more
Date: June 15, 2000
Creator: Leader, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Predictive three dimensional modeling of Stimulated Brillouin Scattering in ignition-scale experiments

Description: The first three-dimensional (3D) simulations of a high power 0.351 {micro}m laser beam propagating through a high temperature hohlraum plasma are reported. We show that 3D linear kinetic modeling of Stimulated Brillouin scattering reproduces quantitatively the experimental measurements, provided it is coupled to detailed hydrodynamics simulation and a realistic description of the laser beam from its millimeter-size envelop down to the micron scale speckles. These simulations accurately predict … more
Date: November 7, 2007
Creator: Divol, L; Berger, R; Meezan, N; Froula, D H; Dixit, S; Suter, L et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measuring the Repassivation Potential of Alloy 22 Using the Potentiodynamic - Galvanostatic - Potentiostatic Method

Description: Traditionally, the susceptibility of Alloy 22 (N06022) to suffer crevice corrosion has been measured using the Cyclic Potentiodynamic Polarization (CPP) technique (ASTM G 61). When the alloy is not very susceptible to crevice corrosion, the values of repassivation potential obtained using the CPP technique are not highly reproducible. To circumvent the large uncertainty in the values of the repassivation potential by the CPP method, the repassivation potential of Alloy 22 may be measured using … more
Date: April 27, 2007
Creator: Evans, K J & Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quarkonium production in high energyproton-proton and proton-nucleus collisions

Description: We present a brief overview of the most relevant current issues related to quarkonium production in high energy proton-proton and proton-nucleus collisions along with some perspectives. After reviewing recent experimental and theoretical results on quarkonium production in pp and pA collisions, we discuss the emerging field of polarization studies. Afterwards, we report on issues related to heavy-quark production, both in pp and pA collisions, complemented by AA collisions. To put the work in b… more
Date: March 14, 2011
Creator: del Valle, Z. C.; Corcella, G.; Fleuret, F.; Ferreiro, E. G.; Kartvelishvili, V.; Kopeliovich, B. et al.
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Partner: UNT Libraries Government Documents Department
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Minimizing emittance growth during H- injection in the AGS booster

Description: As part of the efforts to increase polarization and luminosity in RHIC during polarized proton operations we have modified the injection optics and stripping foil geometry in the AGS Booster in order to reduce the emittance growth during H{sup -} injection. In this paper we describe the modifications, the injection process, and present results from beam experiments.
Date: May 4, 2009
Creator: Brown, K. A.; Ahrens, L.; Gardner, C.; Gassner, D.; Raparia, D.; Steski, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(e,e'N) Reactions

Description: With the advent of a new generation of high energy, high duty cycle electron accelerators, a whole range of new nuclear and subnuclear phenomena can be investigated, in particular through coincidence experiments.This contribution focuses on one and two nucleon emission studies below pion threshold.After a brief review of recent experimental and theoretical work, the study of single nucleon densities through high energy (e,e'N) experiments is discussed.New insights in short-range multihadron phe… more
Date: January 1, 1987
Creator: Mougey, Jean
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Control of visible harmonic generation using polarization in photonic crystal fibers

Description: The polarization state of the input pulses to a segment of microstructured fiber controls the harmonic generation yielding specific frequencies depending on of the input state.
Date: January 1, 2001
Creator: Omenetto, F. G. (Fiorenzo G.); Efimov, A. V. (Anatoly V.); Taylor, Antoinette J.,; Knight, J. C. (Jonathan C.); Wadsworth, W. J. (William J.) & Russell, P. S. J. (Philip St. J.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Simulations on the AGS horizontal tune jump mechanism

Description: A new horizontal tune jump mechanism has been proposed to overcome the horizontal intrinsic resonances and preserve the polarization of the proton beam in the Alternating Gradient Synchrotron (AGS) during the energy ramp. An adiabatic change of the AGS lattice is needed to avoid the emittance growth in both horizontal and vertical planes, as the emittance growth can deteriorate the polarization of the proton beam. Two critical questions are necessary to be answered: how fast can the lattice be … more
Date: May 4, 2009
Creator: Lin,F.; Huang, H.; Luccio, A. U. & Roser, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Exploring the Polarization of Gluons in the Nucleon.

Description: We give an overview of the current status of investigations of the polarization of gluons in the nucleon. We describe some of the physics of the spin-dependent gluon parton distribution and its phenomenology in high-energy polarized hadronic scattering. We also review the recent experimental results.
Date: October 22, 2007
Creator: Stratmann, M. & Vogelsang, W.
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Partner: UNT Libraries Government Documents Department
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Bunch Profiles in Rhic From Cni Polarimeter Target Scans.

Description: During the RHIC run-4 polarized proton operation, the intensity and polarization profiles were measured by scanning the Coulomb-nuclear interference (CNI) polarimeter targets across the beam. The scans reported here were all performed on flattop at beam momenta {approx}100 GeV/c, and all but one was a vertical scan, since several of the vertical polarimeter targets had broken by the time of the measurements. This note summarizes some analyses of these profiles. Wall current monitor data are com… more
Date: June 3, 2005
Creator: Spinka, H. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of the Polarization in Elastic Electron ProtonScattering

Description: We have measured the (illegible) scattering (?-illegible) of electrons (?-illegible) from a polarized proton target. (illegible) between (?-illegible) imaginary part of the two-photon-(illegible) (illegible) photon-exchange amplitude could produce (?-illegible) (illegible) results indicate no asymmetry within (illegible) 1 to 2% at four(?-illegible)-momentum transfer (illegible) (illegible) 0.98 (GeV/c){sup 2}.
Date: March 1, 1970
Creator: Powell, Thomas; Chamberlain, Owen & Borghini, Michel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Polarization Studies of CdZnTe Detectors Using Synchrotron X-Ray Radiation.

Description: New results on the effects of small-scale defects on the charge-carrier transport in single-crystal CdZnTe (CZT) material were produced. We conducted detailed studies of the role of Te inclusions in CZT by employing a highly collimated synchrotron x-ray radiation source available at Brookhaven's National Synchrotron Light Source (NSLS). We were able to induce polarization effects by irradiating specific areas with the detector. These measurements allowed the first quantitative comparison betwee… more
Date: July 1, 2007
Creator: Camarda, G. S.; Bolotnikov, A. E.; Cui, Y.; Hossain, A. & James, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Overview of nonintercepting beam-size monitoring with optical diffraction radiation

Description: The initial demonstrations over the last several years of the use of optical diffraction radiation (ODR) as nonintercepting electron-beam-parameter monitors are reviewed. Developments in both far-field imaging and near-field imaging are addressed for ODR generated by a metal plane with a slit aperture, a single metal plane, and two-plane interferences. Polarization effects and sensitivities to beam size, divergence, and position will be discussed as well as a proposed path towards monitoring 10… more
Date: August 1, 2010
Creator: Lumpkin, Alex H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Run-09 pC polarimeter analysis

Description: Analysis of PC polarimeter data at {radical}s = 200 and 500 GeV from Run9 is presented. Final polarization results, fill-by-fill, for blue and yellow beams, as to be used by RHIC experiments (in collisions) are released and collected in http://www4.rcf.bnl.gov/cnipol/pubdocs/Run09Offline/. Global relative systematic uncertainties {delta}P/P (to be considered as correlated from fill to fill) are 4.7% for 100 GeV beams, and 8.3% (12.1%) for blue (yellow) 250 GeV beams. For a product of two beam p… more
Date: August 1, 2010
Creator: Alekseev, I.; Aschenauer, E.; Atoyan, G.; Bazilevsky, A.; Gill, R.; Huang, H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PROCEEDINGS OF RIKEN BNL RESEARCH CENTER WORKSHOP, RHIC SPIN COLLABORATION MEETINGS VIII, IX, X, XI, APRIL 12, MAY, 22, JUNE 17, JULY 29, 2002.

Description: Since its inception, the RHIC Spin Collaboration (RSC) has held semi-regular meetings each year to discuss the physics possibilities and the operational details of the program. Having collected our first data sample of polarized proton-proton collisions in Run02 of RHIC, we are now in the process of examining the performance of both the accelerator and the experiments. From this evaluation, we not only aim to formulate a consensus plan for polarized proton-proton during Run03 of RHIC but also t… more
Date: March 6, 2003
Creator: Fox, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COAL AND COAL CONSTITUENT STUDIES BY ADVANCED EMR TECHNIQUES

Description: Advanced electronic magnetic resonance (EMR) methods are used to examine properties of coals, chars, and molecular species related to constituents of coal. During this grant period, progress was made on setting up a separate high frequency EMR system particularly appropriate for such studies and exploring the use of low-frequency dynamic nuclear polarization (DNP) to examine the interaction between fluids such as water and the surface of suspended char particles.
Date: March 28, 1997
Creator: Belford, R. Linn & Clarkson, Robert B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spin Matching From Ags to RHIC.

Description: With a partial Siberian snake in the AGS and transport lines with interspersed horizontal and vertical bends, the incoming spin direction at the injection points of both the collider rings is not likely to match the ideal vertical stable spin direction of RHIC which has two full helical Siberian snakes per ring. In this paper we examine the matching of a polarized beam transferred from the AGS into RHIC. The present 5% partial solenoidal snake as well as a proposed 20% superconducting helical a… more
Date: November 6, 2002
Creator: MacKay, W. W. & Tsoupas, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Longitudinal Spin Transfer to Lambda and Lambda bar Hyperons in Polarized Proton-Proton Collisions at sqrt s = 200 GeV

Description: The longitudinal spin transfer, D{sub LL}, from high energy polarized protons to {Lambda} and {bar {Lambda}} hypersons has been measured for the first time in proton-proton collisions at {radical}s = 200 GeV with the STAR detector at RHIC. The measurements cover pseudorapidity, {eta}, in the range |{eta}| < 1.2 and transverse momenta, p{sub T}, up to 4 GeV/c. The longitudinal spin transfer is found to be D{sub LL} = -0.03{+-}0.13(stat){+-}0.04(syst) for inclusive {Lambda} and D{sub LL} = -0.… more
Date: July 5, 2010
Creator: STAR Collaboration
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Partner: UNT Libraries Government Documents Department
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Differences in Bulk Damage Probability Distributions Between Tripler and Z-Cuts of KDP and DKDP at 355 nm

Description: Over the course of testing a substantial number of KDP and DKDP crystals from rapid and conventional growth processes, we have discovered that there is a consistent difference in the value of the damage resistance between z-cut and tripler, x-cut and y-cut crystals for a given test fluence. This increase in damage probability for tripler, x and y-cut crystals is consistent for both conventional and rapid growth KDP as well as DKDP. It also holds for unconditioned (S/1) and conditioned (R/l) tes… more
Date: December 11, 2000
Creator: Runkel, M & Burnham, A K
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Partner: UNT Libraries Government Documents Department
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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
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