Now showing items 1-20 of 59

    • Viscous effects in a collisional tokamak plasma with strong rotation 

      Stacey, Weston M.; Sigmar, D. J. (Georgia Institute of TechnologyAmerican Institute of Physics, 1985-09)
      The full viscosity tensor for an axisymmetric toroidal plasma in the collisional regime (with strong rotation) is calculated, including gyroviscosity and O(ϵ) poloidal variations over the flux surface. It is shown that the ...
    • Poloidal rotation and density asymmetries in a tokamak plasma with strong toroidal rotation 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 1992-10)
      A neoclassical model for calculating poloidal rotation and poloidal density asymmetries in a tokamak plasma with vϕ∼vth and E/Bθ∼O(1) is developed. Application is made to the analysis of a deuterium plasma with a dominant ...
    • Poloidal rotation, density asymmetries, and momentum confinement in tokamak experiments 

      Stacey, Weston M.; Jackson, D. R. (Georgia Institute of TechnologyAmerican Institute of Physics, 1993-06)
      Poloidal rotation speeds and density asymmetries are calculated for the deuterium and dominant carbon (oxygen) impurity ions in discharges in the Axially Symmetric Divertor Experiment (ASDEX) [Proceedings of the 13th ...
    • An interface current balance formulation of neutral atom transport theory in plasmas 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 1997-01)
      An interface current balance (ICB) method for neutral particle transport is presented and specialized to the calculation of neutral atom transport in background plasmas. A multigroup extension of the ICB methodology is ...
    • Commentaries on Criticisms of Magnetic Fusion 

      Stacey, Weston M. (Georgia Institute of Technology, 1999-01-01)
      This report provides brief commentaries on a representative set of the criticisms of magnetic fusion which have been published over the years and includes annexes which summarize technical information in support of the ...
    • Neoclassical theory for rotation and impurity transport in tokamaks with neutral beam injection 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2001-01)
      A self-consistent, first-principles neoclassical theory for rotation and impurity transport in tokamaks is presented. The implications of this theory for impurity transport in a tokamak are illustrated by a model problem ...
    • Momentum confinement in DIII-D shots with impurities 

      Stacey, Weston M.; Murakami, M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2001-07-05)
      A neoclassical momentum transport model, consisting of gyroviscous and convective components, is applied to the analysis of momentum confinement in DIII-D [Luxon, Anderson, Batty et al., Plasma Physics and Controlled Nuclear ...
    • An edge pedestal model based on transport and atomic physics 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2001-09)
      A model is presented for the calculation of the characteristic scale lengths from transport considerations in the edge pedestal region of high confinement (H-mode) plasmas. The model is based on the requirements of heat ...
    • An edge pedestal investigation for high-confinement tokamak plasmas 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2002-01-23)
      A model for the edge pedestal in high-confinement mode tokamak plasmas is described. Separate gradient scale lengths of the density and of the ion and electron temperatures are calculated from transport and atomic physics ...
    • A Fusion Transmutation of Waste Reactor 

      Stacey, Weston M.; Mandrekas, John; Hoffman, E. A. (Elisha Albright); Kessler, G. P.; Kirby, C. M.; Mauer, A. N.; Noble, J. J.; Stopp, D. M.; Ulevich, D. S. (Georgia Institute of TechnologyAmerican Nuclear Society, 2002-03)
      A design concept and the performance characteristics for a fusion transmutation of waste reactor (FTWR)—a sub-critical fast reactor driven by a tokamak fusion neutron source--are presented. The present design concept is ...
    • Comparison of neoclassical rotation theory with experiment under a variety of conditions in DIII-D 

      Stacey, Weston M.; Mandrekas, John (Georgia Institute of TechnologyAmerican Institute of Physics, 2002-03)
      A neoclassical theory of gyroviscous radial momentum transport and poloidal and toroidal rotation has been compared with experiment in DIII-D discharges in different confinement regimes, with a range of neutral beam powers ...
    • Neoclassical calculation of poloidal rotation and poloidal density asymmetries in tokamaks 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2002-09)
      A previous model for the calculation of poloidal velocities and poloidal density asymmetries in the core of a tokamak plasma is refined and extended by the inclusion of terms which are important for the calculation of these ...
    • A framework for the development and testing of an edge pedestal model: formulation and initial comparison with DIII-D data 

      Stacey, Weston M.; Groebner, Richard J. (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-06)
      A framework has been formulated for the further development and testing of a predictive edge pedestal model. This framework combines models for the interaction of the various physical phenomena acting in the edge ...
    • Compartative fuel cycle analysis of critical and sub-critical fast reactor transmutation systems 

      Stacey, Weston M.; Hoffman, E. A. (Elisha Albright) (Georgia Institute of TechnologyAmerican Nuclear Society, 2003-10)
      Fuel cycle analyses are performed to evaluate the impacts of further transmutation of spent nuclear fuel on high-level and low-level waste mass flows into repositories, on the composition and toxicity of the high-level ...
    • Nuclear design and analysis of the fusion transmutation of waste reactor 

      Stacey, Weston M.; Hoffman, E. A. (Elisha Albright) (Georgia Institute of TechnologyAmerican Nuclear Society, 2004-01)
      The nuclear design and safety analyses for the Fusion Transmutation of Waste Reactor (FTWR) are described. The advantages of sub-critical operation for nuclear stability and safety are illustrated.
    • A Superconducting Tokamak Fusion Transmutation of Waste Reactor 

      Stacey, Weston M.; Mauer, A. N.; Mandrekas, John; Hoffman, E. A. (Elisha Albright) (Georgia Institute of TechnologyAmerican Nuclear Society, 2004-01)
      We are developing a Fusion Transmutation of Waste Reactor (FTWR) concept—a sub-critical, metal fuel, liquid metal cooled fast reactor driven by a tokamak DT fusion neutron source. An emphasis is placed on using nuclear, ...
    • Testing of an edge thermal instability stabilization model for the low-to-high mode power threshold 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-02)
      A test of a new model for the low-to-high (L-H) mode power threshold, based on the stabilization of edge thermal instabilities, is made by comparison with a set of DIII-D [J. L. Luxon, Nucl. Fusion, 42, 614, 2002] ...
    • Particle Transport and Density Gradient Scale Lengths in the Edge Pedestal 

      Stacey, Weston M. (Georgia Institute of TechnologyWiley-VCH Verlag, 2004-04)
      A new flux-gradient relation for the ion particle flux in the edge pedestal is derived from continuity and momentum balance, taking into account atomic physics, and cast in the form of a generalized ‘diffusion-pinch’ ...
    • Investigation of transport in the DIII-D edge pedestal 

      Stacey, Weston M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-04)
      A comparison of various heat conduction theories with data from several DIII-D [Luxon, Nucl. Fusion, 42, 614, 2002] shots indicates: 1) that neoclassical theory is in somewhat better agreement with experiment than is ion ...
    • Extensions of the TEP Neutral Transport Methodology 

      Stacey, Weston M.; Zhang, Dingkang; Mandrekas, John (Georgia Institute of TechnologyWiley-VCH Verlag GmbH & Co. KGaA, 2004-04)
      Recent extensions of the Transmission and Escape Probability methodology and its implementation in the 2-D neutral transport code GTNEUT are presented. These extensions address the issues of anisotropy of the neutral ...