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Modification of Edge Plasma Turbulence by External Magnetic Pertubations

Description: Magnetostatic perturbations applied to the DIII-D plasma using a n=3 coil set have significant impact on the plasma edge, such as edge localized mode (ELM) suppression [1], but also affect the background turbulence levels. Discharges with parameters R=1.75 m, a=0.56 m, B{sub T} {approx} 1.6 T, I{sub p} {approx} 1 MA and n{sub e} {approx} 3 x 10{sup 13} cm{sup -3}-n{sub e} {approx} 7 x 10{sup 13} cm{sup -3} (low, v*{sub e} {approx} 0.1 and moderate, v*{sub e} {approx} 1 electron pedestal collisi… more
Date: June 19, 2006
Creator: Boedo, J.; McKee, G.; Rudakov, D.; Reiser, D.; Evans, T.; Moyer, R. et al.
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Partner: UNT Libraries Government Documents Department
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DIII-D Studies of Massive Gas Injection Fast Shutdowns for Disruption Mitigation

Description: Injection of massive quantities of gas is a promising technique for fast shutdown of ITER for the purpose of avoiding divertor and first wall damage from disruptions. Previous experiments using massive gas injection (MGI) to terminate discharges in the DIII-D tokamak have demonstrated rapid shutdown with reduced wall heating and halo currents (relative to natural disruptions) and with very small runaway electron (RE) generation [1]. Figure 1 shows time traces which give an overview of shutdown … more
Date: June 19, 2006
Creator: Hollmann, E.; Jernigan, T.; Antar, G.; Bakhtiari, M.; Boedo, J.; Combs, S. et al.
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Partner: UNT Libraries Government Documents Department
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Far SOL Transport and Main Wall Plasma Interaction in DIII-D

Description: Far scrape-off layer (SOL) and near-wall plasma parameters in DIII-D depend strongly on the discharge parameters and confinement regime. In L-mode discharges cross-field transport increases with the average discharge density and flattens far SOL profiles, thus increasing plasma-wall contact. In H-mode between edge localized modes (ELMs), plasma-wall contact is generally weaker than in L-mode. During ELMs plasma fluxes to the wall increase to, or above the L-mode levels. Depending on the dischar… more
Date: October 19, 2004
Creator: Rudakov, D. L.; Boedo, J. A.; Moyer, R. A.; Stangeby, P. C.; Watkins, J. G.; Whyte, D. G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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