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in creator/contributor: "Porter, G. D."  
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Comparison of Elm Pulse Propagation in the Diii-D Sol and Divertors With an Ion Convection Model

Description: OAK-B135 Results from dedicated ELM experiments, performed in DIII-D with fast diagnostics to measure the evolution of Type-I ELM effects in the SOL and divertor, are compared with a simple ion convection model and with initial time-dependent UEDGE simulations. Delays between ELM effects observed in the inner versus the outer divertor regions in the experiments scale, as a function of density, with the difference in ion convection time along field lines from the outer midplane to the divertor t… more
Date: August 1, 2003
Creator: Fenstermacher, M. E.; Porter, G. D.; Leonard, A. W.; Brooks, N. H.; Boedo, J. A.; Colchin, R. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron Temperature Fluctuations and Cross-Field Heat Transport in the Edge of Diii-D

Description: OAK-B135 The fluctuating E x B velocity due to electrostatic turbulence is widely accepted as a major contributor to the anomalous cross-field transport of particles and heat in the tokamak edge and scrape-off layer (SOL) plasmas. This has been confirmed by direct measurements of the turbulent E x B transport in a number of experiments. Correlated fluctuations of the plasma radial velocity v{sub r}, density n, and temperature T{sub e} result in time-average fluxes of particles and heat given by… more
Date: July 1, 2003
Creator: Rudakov, D. L.; Boedo, J. A.; Moyer, R. A.; Kraseninnikov, S.; Mahdavi, M. A.; McKee, G. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Progress Towards High Performance, Steady-state Spherical Torus

Description: Research on the Spherical Torus (or Spherical Tokamak) is being pursued to explore the scientific benefits of modifying the field line structure from that in more moderate aspect-ratio devices, such as the conventional tokamak. The Spherical Tours (ST) experiments are being conducted in various U.S. research facilities including the MA-class National Spherical Torus Experiment (NSTX) at Princeton, and three medium-size ST research facilities: Pegasus at University of Wisconsin, HIT-II at Univer… more
Date: October 2, 2003
Creator: Ono, M.; Bell, M. G.; Bell, R. E.; Bigelow, T.; Bitter, M.; Blanchard, W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of Main-Chamber and Divertor Recycling in DIII-D Using Tangentially Viewing CID Cameras

Description: Measurements of the D{sub {alpha}} emission profiles from the divertor and main chamber region in DIII-D, performed in low-density L-mode, and low and high-density ELMy H-mode plasmas imply that core plasma fueling occurs through the divertor channel. Emission profiles of carbon, combined with UEDGE modeling of the L-mode plasmas, also suggests that chemical sputtering of carbon from the flux surface adjacent to the inner divertor walls, and temperature gradient forces in the scrape-off layer, … more
Date: June 16, 2003
Creator: Groth, M.; Porter, G. D.; Petrie, T. W.; Fenstermacher, M. E. & Brooks, N. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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