Now showing items 1-20 of 70

  • [2010-06-25] Analysis and modeling of phase noise in LOCSET and the AFRL high power fiber test bed 

    Seeley, Don
    High power ytterbium doped fiber amplifier arrays in a master oscillator-power amplifier configuration and the phase noise in such a system is studied. An effective method of coherently combining the elements in such an ...
  • [2009-08-27] Applications of statistical mechanics and nonlinear science to ecological phenomena 

    Gonzalez-Palacio, Luis Felipe
    The application of techniques widely used in physics to explain biological phenomena has become a very successful endeavor in the past few decades. Such techniques include, but are not limited to, kinetic equations and ...
  • [2010-06-25] Bidirectional mode-locked fiber ring laser 

    de Pinho e Braga, Alexandre Bittencourt
    In modern day world, advances in technology are constantly pushing the limits of improvement in measurement accuracy. With each passing year, government agencies and contract companies increase investment in research of ...
  • [2011-07-02] Coherent control of collective atomic spins 

    Trail, Collin
    In this thesis I explore the use of collective spin angular momentum as a platform for quantum information processing. Such systems have several nice features that make them excellent choices for such protocols, especially ...
  • [2012-05-14] Cold Nuclear Matter Effects on J/ψ Yields as a Function of Rapidity and Nuclear Geometry in d+ A Collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Grim, G.; Jiang, X.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, H.; Liu, M. X.; McGaughey, P. L.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H.W.; Bassalleck, B.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Dharmawardane, K.V.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    We present measurements of J/ψ yields in d+Au collisions at √sNN=200  GeV recorded by the PHENIX experiment and compare them with yields in p+p collisions at the same energy per nucleon-nucleon collision. The measurements ...
  • [2012-08-28] CR geometry and twisting type N vacuum solutions 

    Zhang, Xuefeng
    In the search for vacuum solutions, with or without the cosmological constant Λ, of the Einstein field equations for Petrov type N with twisting principal null directions, the CR structures, which describe the parameter ...
  • [2012-05-14] Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+ p collisions at sqrt (s)= 62.4 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P.D.; Boissevain, J.G.; Brooks, M.L.; Butsyk, S.; Camacho, C.M.; Constantin, P.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, M.X.; McGaughey, P.L.; Palounek, A.P.T.; Purwar, A.K.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Malik, M.D.; Rak, J.; Thomas, T.L.; Younus, I.; Al-Bataineh, H.; Kyle, G.S.; Liu, H.; Papavassiliou, V.; Pate, S.F.; Stepanov, M.; Wang, X.R.
    The comparison of cross-section predictions with data on single-inclusive hadron production in hadronic collisions, p+p → h + X, is important for understanding perturbative quantum chromodynamics (pQCD). For hadrons produced ...
  • [2012-07-02] Design and construction of a Bose Einstein condensate machine 

    Blackburn, Paul W.
    A dilute gas Bose Einstein condensate (BEC) is a state of matter that occurs when a cloud of atoms in a potential are made cold and dense enough that they all occupy the potential's ground state. The onset of this phenomenon ...
  • [2012-08-28] Development and characterization of a 171Yb+ miniature ion trap frequency standard 

    Partner, Heather
    This dissertation reports on the development of a low-power, high-stability miniature atomic frequency standard based on 171Yb+ ions. The ions are buffer-gas cooled and held in a linear quadrupole trap that is integrated ...
  • [2012-07-05] Development of planar and 3D silicon sensor technologies for the ATLAS experiment upgrades and measurements of heavy quark production fractions with fully reconstructed D-star mesons with ATLAS 

    Metcalfe, Jessica
    Several particle detector technologies were studied. These include measurements of the leakage current and capacitance of irradiated planar and 3D sensors. The inter-electrode capacitance of proton irradiated 3D sensors ...
  • [2012-05-10] Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+ Au collisions at sqrt (s_NN)= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Brooks, M.L.; Butsyk, S.; Camacho, C.M.; Constantin, P.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, H.; Liu, M.X.; McGaughey, P.L.; Purwar, A.K.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Kotchetkov, D.; Malik, M.D.; Thomas, T.L.; Younus, I.
    Measurements of the anisotropy parameter v2 of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum pT , and transverse kinetic energy KET at midrapidity (|_| < 0.35) in Au+Au ...
  • [2010-06-25] Dispersion, controlled dispersion, and three applications 

    Bradshaw, Douglas Harris
    Causality dictates that all physical media must be dispersive. (We will call a medium dispersive if its refractive index varies with frequency.) Ordinarily, strong dispersion is accompanied either by strong absorption ...
  • [2012-07-06] Dynamics and distribution of immunoglobolin E receptors : a dialog between experiment and theory 

    Spendier, Kathrin
    This dissertation explores the dynamics and distribution of immunoglobulin E receptors (FceRI) on mast cells by drawing on the techniques of experimental and theoretical physics. The motivation for these investigations is ...
  • [2011-08-31] Early stages of radio galaxy evolution 

    Tremblay, Steven
    Though active galaxies have been studied since the inception of radio astronomy, there remain several large gaps in our understanding. Chief among these, is how the jets possessed by the radio loud variety are ignited. A ...
  • [2012-05-14] Event structure and double helicity asymmetry in jet production from polarized p+ p collisions at sqrt [s]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Butsyk, S.; Constantin, P.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, M. X.; McGaughey, P. L.; Norman, B. E.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H.W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Armendariz, R.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    We report on the event structure and double helicity asymmetry (ALL) of jet production in longitudinally polarized p+p collisions at √s=200  GeV. Photons and charged particles were measured by the PHENIX experiment at ...
  • [2012-05-10] Evolution of pi^ 0 suppression in Au+ Au collisions from sqrt (s_NN)= 39 to 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Aidala, C.; Brooks, M.L.; Guo, L.; Jiang, X.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, M.X.; McGaughey, P.L.; Sondheim, W.E.; Van Hecke, H.W.; You, Z.; Bassalleck, B.; Butsyk, S.; Younus, I.; Al-Ta’ani, H.; Dharmawardane, K.V.; Kyle, G.S.; Papavassiliou, V.; Pate, S.F.; Tennant, E.; Wang, X.R.
    Neutral-pion, _0, spectra were measured at midrapidity (|y| < 0.35) in Au+Au collisions at psNN = 39 and 62.4GeV and compared to earlier measurements at 200GeV in the 1 < pT < 10GeV/c transverse-momentum (pT ) range. The ...
  • [2012-05-09] Experimental determination of the complete spin structure for p¯p→ Λ¯Λ at p{p¯}= 1.637 GeV/c 

    Fields, Douglas E.; Paschke, K. D.; Quinn, B.; Berdoz, A.; Franklin, G. B.; Khaustov, P.; Meyer, C. A.; Bradtke, C.; Gehring, R.; Goertz, S.; Harmsen, J.; Meier, A.; Meyer, W.; Radtke, E.; Reicherz, G.; Dutz, H.; Pluckthun, M.; Schoch, B.; Dennert, H.; Eyrich, W.; Hauffe, J.; Metzger, A.; Moosburger, M.; Stinzing, F.; Wirth, St.; Fischer, H.; Franz, J.; Heinsius, F. H.; Kriegler, E.; Schmitt, H.; Bunker, B.; Hertzog, D.; Jones, T.; Tayloe, R.; Broders, R.; Geyer, R.; Kilian, K.; Oelert, W.; Rohrich, K.; Sachs, K.; Sefzick, T.; Bassalleck, B.; Eilerts, S.; Kingsberry, P.; Lowe, J.; Stotzer, R.; Johansson, T.; Pomp, S.
    The reaction p.p → ^^ → .pπ+pπ− has been measured with high statistics at a beam momentum of pp. = 1.637 GeV/c. The use of a transversely polarized frozen-spin target combined with the self-analyzing property of ^/^ decay ...
  • [2011-07-02] Experimental protocols for and studies of the effects of surface passivation and water isotopes on the gliding speed of microtubules propelled by kinesin-1 

    Maloney, Roger
    This dissertation explores how the kinesin-1 and microtubule system is affected by surface passivation and water isotopes. Surface passivation was found to affect the gliding speed that microtubules exhibit in the ...
  • [2012-08-27] Fault-tolerance in two-dimensional topological systems 

    Anderson, Jonas
    This thesis is a collection of ideas with the general goal of building, at least in the abstract, a local fault-tolerant quantum computer. The connection between quantum information and topology has proven to be an ...
  • [2012-05-14] Heavy-quark production in p+ p and energy loss and flow of heavy quarks in Au+ Au collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Burward-Hoy, J. M.; Butsyk, S.; Constantin, P.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, M. X.; McGaughey, P. L.; Moss, J. M.; Norman, B. E.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Sullivan, J. P.; Van Hecke, H. W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Al-Jamel, A.; Armendariz, R.; Brown, D. S.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    Transverse momentum spectra of electrons (pTe) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3<pTe<9.0 GeV/c have been measured at midrapidity (|y|<0.35) by the PHENIX experiment at the Relativistic ...