Search Results - "Rhodes, T L"

Achievement of Reactor-Relevant Performance in Negative Triangularity Shape in the DIII-D Tokamak by Austin, M E, Marinoni, A, Walker, M L, Brookman, M W, deGrassie, J S, Hyatt, A W, McKee, G R, Petty, C C, Rhodes, T L, Smith, S P, Sung, C, Thome, K E, Turnbull, A D

“…Plasma discharges with a negative triangularity (δ=-0.4) shape have been created in the DIII-D tokamak with a significant normalized beta (β_{N}=2.7) and…”
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Modulation of Core Turbulent Density Fluctuations by Large-Scale Neoclassical Tearing Mode Islands in the DIII-D Tokamak by Bardóczi, L, Rhodes, T L, Carter, T A, Bañón Navarro, A, Peebles, W A, Jenko, F, McKee, G

“…We report the first observation of localized modulation of turbulent density fluctuations n[over ˜] (via beam emission spectroscopy) by neoclassical tearing…”
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Role of zonal flow predator-prey oscillations in triggering the transition to H-mode confinement by Schmitz, L, Zeng, L, Rhodes, T L, Hillesheim, J C, Doyle, E J, Groebner, R J, Peebles, W A, Burrell, K H, Wang, G

“…Direct evidence of zonal flow (ZF) predator-prey oscillations and the synergistic roles of ZF- and equilibrium E×B flow shear in triggering the low- to…”
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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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Broadening of the Divertor Heat Flux Profile in High Confinement Tokamak Fusion Plasmas with Edge Pedestals Limited by Turbulence in DIII-D by Ernst, D R, Bortolon, A, Chang, C S, Ku, S, Scotti, F, Wang, H Q, Yan, Z, Chen, Jie, Chrystal, C, Glass, F, Haskey, S, Hood, R, Khabanov, F, Laggner, F, Lasnier, C, McKee, G R, Rhodes, T L, Truong, D, Watkins, J

“…Multimachine empirical scaling predicts an extremely narrow heat exhaust layer in future high magnetic field tokamaks, producing high power densities that…”
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Multiscale Chirping Modes Driven by Thermal Ions in a Plasma with Reactor-Relevant Ion Temperature by Du, X. D., Hong, R. J., Heidbrink, W. W., Jian, X., Wang, H., Eidietis, N. W., Van Zeeland, M. A., Austin, M. E., Liu, Y., Crocker, N. A., Rhodes, T. L., Särkimäki, K., Snicker, A., Wu, W., Knolker, M.

“…A thermal ion driven bursting instability with rapid frequency chirping, considered as an Alfvénic ion temperature gradient mode, has been observed in plasmas…”
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Suppression of large edge-localized modes in high-confinement DIII-D plasmas with a stochastic magnetic boundary by EVANS, T. E, MOYER, R. A, GROTH, M, HARRIS, J. H, LA HAYE, R. J, LASNIER, C. J, MASUZAKI, S, OHYABU, N, PRETTY, D. G, RHODES, T. L, REIMERDES, H, RUDAKOV, D. L, THOMAS, P. R, SCHAFFER, M. J, WANG, G, ZENG, L, WATKINS, J. G, OSBORNE, T. H, BOEDO, J. A, DOYLE, E. J, FENSTERMACHER, M. E, FINKEN, K. H, GROEBNER, R. J

“…A stochastic magnetic boundary, produced by an applied edge resonant magnetic perturbation, is used to suppress most large edge-localized modes (ELMs) in high…”
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Quasistationary Plasma Predator-Prey System of Coupled Turbulence, Drive, and Sheared E×B Flow During High Performance DIII-D Tokamak Discharges by Barada, K, Rhodes, T L, Burrell, K H, Zeng, L, Bardóczi, L, Chen, Xi, Muscatello, C M, Peebles, W A

“…A new, long-lived limit cycle oscillation (LCO) regime has been observed in the edge of near zero torque high performance DIII-D tokamak plasma discharges…”
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Evidence of Toroidally Localized Turbulence with Applied 3D Fields in the DIII-D Tokamak by Wilcox, R S, Shafer, M W, Ferraro, N M, McKee, G R, Zeng, L, Rhodes, T L, Canik, J M, Paz-Soldan, C, Nazikian, R, Unterberg, E A

“…New evidence indicates that there is significant 3D variation in density fluctuations near the boundary of weakly 3D tokamak plasmas when resonant magnetic…”
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Observation of a critical gradient threshold for electron temperature fluctuations in the DIII-D Tokamak by Hillesheim, J C, DeBoo, J C, Peebles, W A, Carter, T A, Wang, G, Rhodes, T L, Schmitz, L, McKee, G R, Yan, Z, Staebler, G M, Burrell, K H, Doyle, E J, Holland, C, Petty, C C, Smith, S P, White, A E, Zeng, L

“…A critical gradient threshold has been observed for the first time in a systematic, controlled experiment for a locally measured turbulent quantity in the core…”
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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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Toroidally resolved structure of divertor heat flux in RMP H-mode discharges on DIII-D by Jakubowski, M.W., Evans, T.E., Fenstermacher, M.E., Lasnier, C.J., Wolf, R.C., Baylor, L.R., Boedo, J.A., Burrell, K.H., deGrassie, J.S., Gohil, P., Mordijck, S., Laengner, R., Leonard, A.W., Moyer, R.A., Petrie, T.W., Petty, C.C., Pinsker, R.I., Rhodes, T.L., Schaffer, M.J., Schmitz, O., Snyder, P.B., Stoschus, H., Osborne, T.H., Orlov, D.M., Unterberg, E.A., Watkins, J.G.

“…As shown on DIII-D edge localized modes (ELMs) can be either completely eliminated or mitigated with resonant magnetic perturbation (RMP) fields. Two infrared…”
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Slow L-H transitions in DIII-D plasmas by Colchin, R J, Schaffer, M J, Carreras, B A, McKee, G R, Maingi, R, Carlstrom, T N, Rudakov, D L, Greenfield, C M, Rhodes, T L, Doyle, E J, Brooks, N H, Austin, M E

“…The transition from the low to the high mode of plasma confinement ( L-H transition) is studied in the DIII-D by an experimental technique which allows an…”
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Correlation of neutral beam injection parameters and core β with anomalous first-wall heating during QH-mode by Lasnier, C.J., Burrell, K.H., deGrassie, J.S., Rhodes, T.L., VanZeeland, M.A., Watkins, J.G.

“…Anomalous first-wall heating has been observed far from the divertor strike point during QH-mode in DIII-D, with measured heat flux comparable to that at the…”
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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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SOL and pedestal density profile evolution during DIII-D ELMy and ELM-suppressed H-mode operation by Zeng, L., Wang, G., Doyle, E.J., Rhodes, T.L., Peebles, W.A., Fenstermacher, M.E., Evans, T.E., Moyer, R.A.

“…A fast profile reflectometer has been used to study the detailed characteristics of scrape-off-layer (SOL) and pedestal density profile evolution in DIII-D…”
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Evidence for confinement improvement by velocity-shear suppression of edge turbulence by RITZ, C. P, LIN, H, RHODES, T. L, WOOTTON, A. J

“…The electrostatic fluctuations are decorrelated in the region of a naturally occurring {bold E}{sub {ital r}}{times}{bold B} velocity shear close to the…”
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Fluctuation-induced energy flux in the tokamak edge by RITZ, C. P, BRAVENEC, R. V, LIN, H, PHILLIPS, P. E, RHODES, T. L, ROWAN, W. L, VALANJU, P. M, WOOTTON, A. J, SCHOCH, P. M, BENGTSON, R. D, BOEDO, J. A, FORSTER, J. C, GENTLE, K. W, HE, Y, HICKOK, R. L, KIM, Y. J

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Observation of reduced electron-temperature fluctuations in the core of H-mode plasmas by Schmitz, L, White, A E, Carter, T A, Peebles, W A, Rhodes, T L, Burrell, K H, Solomon, W, Staebler, G M

“…Core electron-temperature fluctuations [0.5%< or =T[over ]_(e)/T_(e)< or =2%, k_(theta)rho_(s)< or =0.3 in neutral-beam-heated low confinement-mode (L-mode)…”
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Ray-tracing Analysis for Cross-polarization Scattering Diagnostic on MAST-Upgrade Spherical Tokamak by Hong, R, Rhodes, T. L, Wang, G, Peebles, W. A

“…Rev Sci Instrum 92, 063505 (2021) A combined Doppler backscattering/cross-polarization scattering (DBS/CPS) system is being deployed on MAST-U, for…”
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