Search Results - "STRAIT, E. J"

Neoclassical Tearing Mode Seeding by Nonlinear Three-Wave Interactions in Tokamaks by Bardóczi, L., Logan, N. C., Strait, E. J.

“…We report the experimental observation of seed magnetic island formation by nonlinear three-wave coupling of magnetic island triplets. In this experiment,…”
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Observation of a multimode plasma response and its relationship to density pumpout and edge-localized mode suppression by Paz-Soldan, C, Nazikian, R, Haskey, S R, Logan, N C, Strait, E J, Ferraro, N M, Hanson, J M, King, J D, Lanctot, M J, Moyer, R A, Okabayashi, M, Park, J-K, Shafer, M W, Tobias, B J

“…Density pumpout and edge-localized mode (ELM) suppression by applied n=2 magnetic fields in low-collisionality DIII-D plasmas are shown to be correlated with…”
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Pedestal bifurcation and resonant field penetration at the threshold of edge-localized mode suppression in the DIII-D Tokamak by Nazikian, R, Paz-Soldan, C, Callen, J D, deGrassie, J S, Eldon, D, Evans, T E, Ferraro, N M, Grierson, B A, Groebner, R J, Haskey, S R, Hegna, C C, King, J D, Logan, N C, McKee, G R, Moyer, R A, Okabayashi, M, Orlov, D M, Osborne, T H, Park, J-K, Rhodes, T L, Shafer, M W, Snyder, P B, Solomon, W M, Strait, E J, Wade, M R

“…Rapid bifurcations in the plasma response to slowly varying n=2 magnetic fields are observed as the plasma transitions into and out of edge-localized mode…”
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Avoiding Tokamak Disruptions by Applying Static Magnetic Fields That Align Locked Modes with Stabilizing Wave-Driven Currents by Volpe, F A, Hyatt, A, La Haye, R J, Lanctot, M J, Lohr, J, Prater, R, Strait, E J, Welander, A

“…Nonrotating ("locked") magnetic islands often lead to complete losses of confinement in tokamak plasmas, called major disruptions. Here locked islands were…”
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Observation of plasma rotation driven by static nonaxisymmetric magnetic fields in a tokamak by Garofalo, A M, Burrell, K H, DeBoo, J C, deGrassie, J S, Jackson, G L, Lanctot, M, Reimerdes, H, Schaffer, M J, Solomon, W M, Strait, E J

“…We present the first evidence for the existence of a neoclassical toroidal rotation driven in a direction counter to the plasma current by nonaxisymmetric,…”
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DIII-D Research to Prepare for Steady State Advanced Tokamak Power Plants by Buttery, R. J., Covele, B., Ferron, J., Garofalo, A., Holcomb, C. T., Leonard, T., Park, J. M., Petrie, T., Petty, C., Staebler, G., Strait, E. J., Van Zeeland, M.

“…We review progress made on the advanced tokamak path to fusion energy by the DIII-D National Fusion Facility (Luxon et al. in Nucl Fusion 42:614, 2002 ). The…”
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Reduced critical rotation for resistive-wall mode stabilization in a near-axisymmetric configuration by Reimerdes, H, Garofalo, A M, Jackson, G L, Okabayashi, M, Strait, E J, Chu, M S, In, Y, La Haye, R J, Lanctot, M J, Liu, Y Q, Navratil, G A, Solomon, W M, Takahashi, H, Groebner, R J

“…Recent DIII-D experiments with reduced neutral beam torque and minimum nonaxisymmetric perturbations of the magnetic field show a significant reduction of the…”
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Measurement of the resistive-wall-mode stability in a rotating plasma using active MHD spectroscopy by REIMERDES, H, CHU, M. S, GAROFALO, A. M, JACKSON, G. L, HAYE, R. J, NAVRATIL, G. A, OKABAYASHI, M, SCOVILLE, J. T, STRAIT, E. J

“…The stability of the resistive-wall mode (RWM) in DIII-D plasmas above the conventional pressure limit, where toroidal plasma rotation in the order of a few…”
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Sustained stabilization of the resistive-wall mode by plasma rotation in the DIII-D tokamak by Garofalo, A M, Strait, E J, Johnson, L C, La Haye, R J, Lazarus, E A, Navratil, G A, Okabayashi, M, Scoville, J T, Taylor, T S, Turnbull, A D

“…Values of the normalized plasma pressure up to twice the free-boundary stability limit predicted by ideal magnetohydrodynamic (MHD) theory have been sustained…”
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Multitude of core-localized shear Alfvén waves in a high-temperature fusion plasma by Nazikian, R, Berk, H L, Budny, R V, Burrell, K H, Doyle, E J, Fonck, R J, Gorelenkov, N N, Holcomb, C, Kramer, G J, Jayakumar, R J, La Haye, R J, McKee, G R, Makowski, M A, Peebles, W A, Rhodes, T L, Solomon, W M, Strait, E J, Vanzeeland, M A, Zeng, L

“…Evidence is presented for a multitude of discrete frequency Alfvén waves in the core of magnetically confined high-temperature fusion plasmas. Multiple…”
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Pellet interaction with runaway electrons by James, A.N., Hollmann, E.M., Yu, J.H., Austin, M.E., Commaux, N., Evans, T., Humphreys, D.A., Jernigan, T.C., Parks, P.B., Putvinski, S., Strait, E.J., Tynan, G.R., Wesley, J.

“…We describe results from recent experiments studying interaction of solid polystyrene pellets with a runaway electron current channel generated after cryogenic…”
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Observation of beta-induced Alfvén eigenmodes in the DIII-D tokamak by HEIDBRINK, W. W, STRAIT, E. J, CHU, M. S, TURNBULL, A. D

“…Energetic ions can drive Alfven gap modes unstable, causing large losses of fast ions. Toroidicity-induced Alfven eigenmodes (TAE) were expected to disappear…”
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Reduction of edge-localized mode intensity using high-repetition-rate pellet injection in tokamak H-mode plasmas by Baylor, L R, Commaux, N, Jernigan, T C, Brooks, N H, Combs, S K, Evans, T E, Fenstermacher, M E, Isler, R C, Lasnier, C J, Meitner, S J, Moyer, R A, Osborne, T H, Parks, P B, Snyder, P B, Strait, E J, Unterberg, E A, Loarte, A

“…High repetition rate injection of deuterium pellets from the low-field side (LFS) of the DIII-D tokamak is shown to trigger high-frequency edge-localized modes…”
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Intense geodesic acousticlike modes driven by suprathermal ions in a tokamak plasma by Nazikian, R, Fu, G Y, Austin, M E, Berk, H L, Budny, R V, Gorelenkov, N N, Heidbrink, W W, Holcomb, C T, Kramer, G J, McKee, G R, Makowski, M A, Solomon, W M, Shafer, M, Strait, E J, Zeeland, M A Van

“…Intense axisymmetric oscillations driven by suprathermal ions injected in the direction counter to the toroidal plasma current are observed in the DIII-D…”
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Wall stabilization of high beta tokamak discharges in DIII-D by Strait, EJ, Taylor, TS, Turnbull, AD, Ferron, JR, Lao, LL, Rice, B, Sauter, O, Thompson, SJ, Wróblewski, D

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Evidence for the importance of trapped particle resonances for resistive wall mode stability in high beta tokamak plasmas by Reimerdes, H, Berkery, J W, Lanctot, M J, Garofalo, A M, Hanson, J M, In, Y, Okabayashi, M, Sabbagh, S A, Strait, E J

“…Active measurements of the plasma stability in tokamak plasmas reveal the importance of kinetic resonances for resistive wall mode stability. The rotation…”
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Internal Transport Barriers in JET Deuterium-Tritium Plasmas by Gormezano, C., Baranov, Y. F., Challis, C. D., Coffey, I., Cottrell, G. A., Ekedahl, A. C., Greenfield, C. M., Howman, A. C., Huysmans, G. T. A., Keilhacker, M., Litaudon, X., Luce, T. C., Rice, B. W., Rochard, F., Sadler, G. J., Schild, P. A. J., Sips, A. C. C., Söldner, F. X., Strait, E. J., Tubbing, B. J. D., Wade, M. R., Ward, D. J.

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Regime of very high confinement in the boronized DIII-D Tokamak by JACKSON, G. L, WINTER, J, LAO, L. L, LIPPMANN, S. I, OSBORNE, T. H, PETRIE, T. W>, PHILLIPS, J, JAMES, R, SCHISSEL, D. P, STRAIT, E. J, TURNBULL, A. D, WEST, W. P, TAYLOR, T. S, TEAM, D. D, BURRELL, K. H, DEBOO, J. C, GREENFIELD, C. M, GROEBNER, R. J, HODAPP, T, HOLTROP, K, LAZARUS, E. A

“…Following boronization, tokamak discharges in DIII-D have been obtained with confinement times up to a factor of 3.5 above the ITER89-P {ital L}-mode scaling…”
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Initial results of H-mode edge pedestal turbulence evolution with quadrature reflectometer measurements on DIII-D by Wang, G., Peebles, W.A., Doyle, E.J., Rhodes, T.L., Zeng, L., Nguyen, X., Osborne, T.H., Snyder, P.B., Kramer, G.J., Nazikian, R., Groebner, R.J., Burrell, K.H., Leonard, A.W., Fenstermacher, M.E., Strait, E.J.

“…High-resolution quadrature reflectometer measurements of density fluctuation levels have been obtained on DIII-D for H-mode edge pedestal studies. Initial…”
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Tokamak operation with safety factor q95 < 2 via control of MHD stability by Piovesan, P, Hanson, J M, Martin, P, Navratil, G A, Turco, F, Bialek, J, Ferraro, N M, La Haye, R J, Lanctot, M J, Okabayashi, M, Paz-Soldan, C, Strait, E J, Turnbull, A D, Zanca, P, Baruzzo, M, Bolzonella, T, Hyatt, A W, Jackson, G L, Marrelli, L, Piron, L, Shiraki, D

“…Magnetic feedback control of the resistive-wall mode has enabled the DIII-D tokamak to access stable operation at safety factor q(95) = 1.9 in divertor plasmas…”
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