Results 51 to 60 of about 52,799 (163)

Simultaneous access to high normalized density, current, pressure, and confinement in strongly-shaped diverted negative triangularity plasmas

Nuclear Fusion
Strongly-shaped diverted negative triangularity (NT) plasmas in the DIII-D tokamak demonstrate simultaneous access to high normalized density, current, pressure, and confinement.
C. Paz-Soldan, C. Chrystal, P. Lunia, A.O. Nelson, K.E. Thome, M.E. Austin, T.B. Cote, A.W. Hyatt, N. Leuthold, A. Marinoni, T.H. Osborne, M. Pharr, O. Sauter, F. Scotti, T.M. Wilks, H.S. Wilson   +15 more
doaj   +1 more source

Multi-field turbulence and transport barrier measurements and validation of predictive codes for high-performance, negative triangularity ELM-free DIII-D plasmas

Nuclear Fusion
A recent DIII-D campaign demonstrated high confinement, edge-localized mode-free plasmas in strongly shaped, diverted negative triangularity (NT) configurations.
G. Wang, T.L. Rhodes, J. Damba, R. Hong, W.A. Peebles, Q.T. Pratt, L. Zeng, M.E. Austin, K.E. Thome   +8 more
doaj   +1 more source

Toroidal asymmetries in divertor impurity influxes in NSTX

Nuclear Materials and Energy, 2017
Toroidal asymmetries in divertor carbon and lithium influxes were observed in NSTX, due to toroidal differences in surface composition, tile leading edges, externally-applied three-dimensional (3D) fields and toroidally-localized edge plasma ...
F. Scotti, V.A. Soukhanovskii, J.-W. Ahn, A.G. McLean, R. Kaita   +4 more
doaj   +1 more source

Impurity accumulation and edge localized mode(ELM).

Kakuyūgō kenkyū, 1988
The effect of the impurity ions on the L/ H and H/ L transitions in tokamaks is discussed. It is found that the impurity accumulation can trigger the transition from the H-mode to the L-mode. The relation with ELM is also discussed.
Ohkawa, Tihiro, Itoh, Kimitaka, Itoh, Sanae-I.   +2 more
openaire   +2 more sources

Three-dimensional nonlinear modeling of ELM dynamics with biasing in HL-3 tokamak

Nuclear Fusion
The influence of a biased divertor target system on Edge Localized Mode (ELM) dynamics is investigated for the first time in the HL-3 tokamak, focusing on the impact of bias-driven scrape-off layer (SOL) helical currents on three-dimensional (3D ...
J. Huang, G.Z. Hao, Y. Suzuki, Y.Q. Liu, J.X. Li, Z.J. Li, T.F. Sun, B.T. Cui, H.K. Yin, L. Wang, H.Z. Zhao, X.Q. Ji, W.L. Zhong, Y. Liang, HL-3 Team   +14 more
doaj   +1 more source

Application of non-integer-n RMP coil current waveform for ELM control in JA DEMO

Nuclear Fusion
We have studied the resonant magnetic perturbation (RMP) coil concept for edge localized mode (ELM) suppression in JA DEMO, a design concept of a steady-state tokamak demonstration reactor, based on the vacuum magnetic model.
S. Sugiyama, N. Aiba, Y. Suzuki, G. Matsunaga, Y. Nakamura, M. Furukawa, A. Ishizawa, Y. Sakamoto   +7 more
doaj   +1 more source

EDA H-mode in ASDEX Upgrade: scans of heating power, fueling, and plasma current

Nuclear Fusion
Electron cyclotron resonance heating (ECRH) staircase discharges in strongly shaped plasmas were performed at the full-tungsten ASDEX Upgrade tokamak to investigate the enhanced D _α (EDA) H-mode, a high-confinement regime without edge localized modes ...
L. Gil, T. Pütterich, C. Silva, D. Hachmeister, G.D. Conway, P. David, M. Faitsch, R. Fischer, T. Happel, A. Kallenbach, J. Santos, A. Silva, J. Stober, U. Stroth, E. Viezzer, E. Wolfrum, the ASDEX Upgrade Team, the EUROfusion Tokamak Exploitation Team   +17 more
doaj   +1 more source

Study of low-frequency core-edge coupling in a tokamak: II. Spatial channeling & focusing in antenna-driven MHD

Fundamental Plasma Physics
Motivated by evidence for core-edge coupling in the form of double-peaked fishbone-like low-frequency modes ( ≲ 20 kHz ) in KSTAR, which exhibit synchronized Alfvénic activity both in the central core and near the plasma edge [Lee et al., Phys.
Andreas Bierwage, Wonjun Lee, Young-chul Ghim, Panith Adulsiriswad, Nobuyuki Aiba, Seungmin Bong, Gyungjin Choi, Matteo Valerio Falessi, Philipp Lauber, Masatoshi Yagi   +9 more
doaj   +1 more source

Nonlinear reconnecting edge localized modes in tokamaks

, 2017
Nonlinear edge localized modes in a tokamak are examined using global three-dimensional resistive magnetohydrodynamics simulations. Coherent current-carrying filament (ribbon-like) structures wrapped around the torus are nonlinearly formed due to nonaxisymmetric reconnecting current sheet instabilities, the so called peeling-like edge localized modes ...
openaire   +2 more sources

Observation of a stationary double transport barrier in KSTAR

Nuclear Fusion
We have observed a stationary high confinement regime with a double transport barrier (DTB), including both internal and edge transport barriers (ITB and ETB) but without edge-localized modes (ELMs), in KSTAR.
M.W. Lee, S.-H. Hahn, D. Kim, J. Kang, W.H. Ko, J. Jang, W. Lee, C. Sung   +7 more
doaj   +1 more source