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  • 1
    Electronic Resource
    Electronic Resource
    Genetic Studies of Usher Syndrome (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 630 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb19585.x
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  • 2
    Electronic Resource
    Electronic Resource
    Report on Attempts to Localize Usher Syndrome Type 1 by Linkage Analysis to Selected Candidate Regions (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 630 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb19612.x
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  • 3
    Electronic Resource
    Electronic Resource
    Neoclassical theory for rotation and impurity transport in tokamaks with neutral beam injection (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 158-166 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: 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 calculation. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1324664
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  • 4
    Electronic Resource
    Electronic Resource
    Edge pedestal deterioration in tokamak high-mode discharges (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 5199-5203 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A model for calculating edge gradients in density and temperature from transport and atomic physics considerations is combined with a model for calculating the enhancement of edge transport by thermal instabilities, the onset and strength of which in turn depend on edge gradients and atomic physics. A minimum threshold value of the nonradiative power flux passing through the edge that is required to suppress transport enhancing thermal instabilities is established. When the power flux through the edge is less than this minimum threshold value, the model predicts a deterioration of the edge gradients as the neutral concentration, the impurity concentration and/or the impurity radiation emissivity in the edge plasma increase, which is consistent with experimental observations. Model problem calculations are presented to illustrate the predicted pedestal deterioration for representative experimental conditions.© 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1416879
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  • 5
    Electronic Resource
    Electronic Resource
    Validity of the impurity entrainment assumption in the thermal stability analysis of multifaceted asymmetric radiation from the edge (MARFEs) in tokamak plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 242-244 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The assumption that impurity ion perturbations are entrained in phase and in fixed proportion with the main plasma ion perturbations is commonly made in analyses of radiative thermal instabilities in the edge of tokamak plasmas, leading to multifaceted asymmetric radiation from the edge (MARFE). An analysis in which the impurity ion perturbations are treated separately from the plasma ion perturbations demonstrates that this assumption does not alter the conclusion of the analysis regarding stability limits or edge density limits for the (m=0, k||=0) mode, but that inclusion of a separate impurity ion perturbation in the analysis stabilizes the (m〉0, k||≠0) modes. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872138
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  • 6
    Electronic Resource
    Electronic Resource
    Detachment and divertor temperature and density redistribution (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 525-532 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A theoretical model is developed for large scale-length, one-dimensional thermal instabilities along the field lines in tokamak divertors. Calculated growth rates predict a divertor thermal instability under the conditions (low-plasma temperature and density and high-neutral densities at the divertor plate) at which detachment followed by large-scale divertor temperature and density redistributions are observed in several DIII-D [Plasma Physics and Controlled Fusion Research (International Atomic Energy Agency, Vienna, 1986), p. 159] discharges. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1339836
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  • 7
    Electronic Resource
    Electronic Resource
    A numerical study of density limit mechanisms in tokamaks (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 3656-3668 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A core particle and power balance model with radiative cooling, a ballooning-mode-limit pedestal model, a "two-point" plasma divertor model with radiative and atomic recycling cooling, and a two-dimensional (2-D) neutral transport model have been combined to model the coupled plasma core-edge physics in a tokamak. This model has been applied to examine the physical mechanisms which limit the attainable core density. The first limitation is fueling rate and core penetrability. For fueling that is able to penetrate the core, the core density increases with a fueling rate up to a limit set by one of two other mechanisms. When a sufficient impurity concentration is present, the mechanism that limits the maximum density attainable in the core seems to be an impurity-driven thermal instability that produces a thermal collapse of the core plasma. At lower impurity concentrations, the buildup of plasma density in the divertor and the associated increase in atomic recycling and ionization cooling causes a collapse of the divertor plasma temperature, leading to a thermal collapse of the core plasma. An increase in core heating input power or in plasma confinement extends the point of thermal collapse to higher density. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873084
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal instabilities in the edge transport barrier (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 2452-2461 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A linear analysis of the edge transport barrier identifies localized, two-dimensional (radial-perpendicular) thermal instabilities driven by both impurity radiation and atomic (ionization/charge-exchange/elastic scattering) cooling and suppressed by conductive and convective heat transport. These instabilities are stabilized by sufficiently large values of the edge temperature gradient. Numerical calculations indicate that such instabilities would be expected for edge conditions (electron, impurity and neutral atom densities, temperatures, gradient scale lengths) typical of current tokamak experiments. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873517
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  • 9
    Electronic Resource
    Electronic Resource
    Multifaceted asymmetric radiation from the edge suppression by external edge heating (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 134-137 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A linear, fluid model stability analysis of a radiative plasma mantle reveals that the impurity density limit for the onset of multifaceted asymmetric radiation from the edge (MARFE) in tokamaks can be increased by external heating of the radiative mantle at the plasma edge. The required injected power is estimated to be a few MW for present experiments and a few tens of MW for future reactors. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872123
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  • 10
    Electronic Resource
    Electronic Resource
    Multifaceted asymmetric radiation from the edge impurity density limits in tokamaks with poloidal asymmetry and rotation (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3032-3036 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A linear stability analysis of two-dimensional, edge-localized thermal instabilities in tokamaks has been performed using a fluid model which incorporates the effects of large radial gradients and near-sonic rotation speeds. Sufficient stability requirements for fundamental (m=0) and harmonic (m(approximately-greater-than)0) poloidal modes are established and used to investigate the effects of rotation, poloidal asymmetry in the equilibrium solution, parallel current, and parallel momentum injection on impurity density limits. The higher density limits due to parallel heat conduction and parallel viscosity that are associated with the m(approximately-greater-than)0 modes, but that are absent for the m=0 mode, account for the onset and stability of MARFEs (multifaceted asymmetric radiation from the edge). Rotation and asymmetry in the equilibrium solution are significant in the determination of impurity density limits. The MARFE threshold density limit can be increased by driving current in the plasma edge counter to the magnetic field. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871639
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