Results 121 to 130 of about 15,788,610 (233)

Alfvén eigenmodes and fast ion transport in negative triangularity DIII-D plasmas

Nuclear Fusion, 2019
The first energetic particle experiments in negative triangularity tokamak plasmas have been carried out on DIII-D. Alfvén eigenmode (AE) activity and associated fast ion transport comparable to that in positive triangularity is observed during the ...
M. V. Van Zeeland, C. Collins, W. Heidbrink, M. Austin, X.D. Du, V. Duarte, A. Hyatt, G. Kramer, N. Gorelenkov, B. Grierson, D. Lin, A. Marinoni, G. McKee, C. Muscatello, C. Petty, C. Sung, K. Thome, M. Walker, Y.B. Zhu   +18 more
semanticscholar   +1 more source

Experimental Measurement of ECH Deposition Broadening: Beyond Anomalous Transport

EPJ Web of Conferences, 2017
This work provides a first experimental measurement of broadened ECH deposition on the DIIID tokamak. As seen in theory[1] and simulation[2], refraction by edge density fluctuations shifts the path of RF waves, altering ECH and ECCD deposition.
Brookman M. W., Austin M. E., Gentle K. W., Petty C. C., Ernst D. E., Peysson Y., Decker J., Barada K.   +7 more
doaj   +1 more source

The causes of the disruptive tearing instabilities of the ITER Baseline Scenario in DIII-D

Nuclear Fusion, 2018
Analysis of the evolving current density (J), pedestal and rotation profiles in a database of 200 ITER Baseline Scenario (IBS) demonstration discharges in the DIII-D tokamak identifies the current profile as a key determinant of the disruptive ...
F. Turco, T. Luce, W. Solomon, G. Jackson, G. Navratil, J. Hanson   +5 more
semanticscholar   +1 more source

Recent DIII-D advances in runaway electron measurement and model validation

Nuclear Fusion, 2019
Novel measurements and modeling of runaway electron (RE) dynamics in DIII-D have resolved experimental discrepancies and validated predictions for ITER, improving confidence that RE avoidance and mitigation can be predictably achieved.
C. Paz-Soldan, N. Eidietis, E. Hollmann, P. Aleynikov, L. Carbajal, W. Heidbrink, M. Hoppe, C. Liu, A. Lvovskiy, D. Shiraki, D. Spong, D. Brennan, C. Cooper, D. del-Castillo-Negrete, X. Du, O. Embreus, T. Fulop, J. Herfindal, R. Moyer, P. Parks, K. Thome   +20 more
semanticscholar   +1 more source

Grassy-ELM regime with edge resonant magnetic perturbations in fully noninductive plasmas in the DIII-D tokamak

Nuclear Fusion, 2018
Resonant magnetic perturbations (n  =  3 RMPs) are used to suppress large amplitude ELMs and mitigate naturally occurring ‘grassy’-ELMs in DIII-D plasmas relevant to the ITER steady-state mission.
R. Nazikian, C. Petty, A. Bortolon, Xi Chen, D. Eldon, T. Evans, B. Grierson, N. Ferraro, S. Haskey, M. Knolker, C. Lasnier, N. Logan, R. Moyer, D. Orlov, T. Osborne, C. Paz-Soldan, F. Turco, H.Q. Wang, D. Weisberg   +18 more
semanticscholar   +1 more source

Visualizing DIII-D Tokamak magnetic field lines

Proceedings Visualization 2000. VIS 2000 (Cat. No.00CH37145), 2002
We demonstrate the use of a combination of perceptually effective techniques for visualizing magnetic field data from the DIII-D Tokamak. These techniques can be implemented to run very efficiently on machines with hardware support for OpenGL. Interactive speeds facilitate clear communication of magnetic field structure, enhancing fusion scientists ...
Schussman, Greg, Ma, Kwan-Liu, Schissel, David, Evans, Todd   +3 more
openaire   +2 more sources

Effect of outer divertor leg detachment on the high field side scrape-off layer in DIII-D and ASDEX Upgrade

Nuclear Fusion
In this work, evidence is presented that detachment of the outer divertor leg leads to a reduction of electron density and neutral pressure in the high-field side (HFS) scrape-off layer (SOL) of the ASDEX Upgrade (AUG) and DIII-D tokamaks with ion $B ...
R. Gerru, D. Hachmeister, M.G. Burke, L. Horvath, T.M. Wilks, A. Bortolon, J.W. Hughes, Q. Pratt, F. Scotti, C. Tsui, R. Hood, N. Yadava, G. Ronchi, J. Damba, D. Brida, M. Griener, B. Kurzan, A. Silva, J. Santos, the DIII-D Team, the ASDEX Upgrade Team   +20 more
doaj   +1 more source

Erosion characterization of SiC and Ti3SiC2 on DIII-D using focused ion beam micro-trenches

Nuclear Materials and Energy, 2019
Plasma-facing materials in future large-scale fusion reactors must be designed to withstand high heat fluxes from extreme off-normal events such as edge localized modes and unmitigated plasma disruptions.
J. Coburn, E. Unterberg, J. Barton, D. Rudakov, I. Bykov, C.M. Parish, R. Wilcox, C. Lasnier, T. Abrams, J. Watkins, D.L. Hillis, M. Bourham   +11 more
doaj   +1 more source

DIII-D Research to Prepare for Steady State Advanced Tokamak Power Plants

Journal of fusion energy, 2018
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).
R. Buttery, B. Covele, J. Ferron, A. Garofalo, C. Holcomb, T. Leonard, Jin Myung Park, T. Petrie, C. Petty, G. Staebler, E. Strait, M. Zeeland   +11 more
semanticscholar   +1 more source

Effects of non-axisymmetric magnetic field on neoclassical transport and ambipolar electric field in tokamak plasmas

Journal of Physics Communications
This study investigates how resonant magnetic perturbation (RMP) govern neoclassical transport and ambipolar electric field dynamics in tokamak plasmas.
Hanhui Li, Zhenggong Han, Yanyan Lu
doaj   +1 more source