Results 1 to 10 of about 5,366,310 (324)

MHD stability of negative triangularity DIII-D plasmas [PDF]

Nuclear Fusion, 2023
Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive n = 2 tearing modes, which experience q _min $ \geqslant $ 1 similar to the positive triangularity hybrid ...
W. Boyes, F. Turco, J. Hanson, A. Marinoni, A. Turnbull, M. Austin, G. Navratil   +6 more
doaj   +4 more sources

First access to ELM-free negative triangularity at low aspect ratio [PDF]

Nuclear Fusion
A plasma scenario with negative triangularity (NT) shaping is achieved on MAST-U for the first time. While edge localized modes (ELMs) are eventually suppressed as the triangularity is decreased below $\delta\lesssim-0.06$ , an extended period of H-mode ...
A.O. Nelson, C. Vincent, H. Anand, J. Lovell, J.F. Parisi, H.S. Wilson, K. Imada, W.P. Wehner, M. Kochan, S. Blackmore, G. McArdle, S. Guizzo, L. Rondini, S. Freiberger, C. Paz-Soldan, the MAST-U Team   +15 more
doaj   +6 more sources

MANTA: a negative-triangularity NASEM-compliant fusion pilot plant [PDF]

Plasma Physics and Controlled Fusion
The MANTA (Modular Adjustable Negative Triangularity ARC-class) design study investigated how negative-triangularity (NT) may be leveraged in a compact, fusion pilot plant (FPP) to take a ‘power-handling first’ approach. The result is a pulsed, radiative,
G. Rutherford, Harold S. Wilson, Amanda F. Saltzman, David P. Arnold, J. Ball, Stuart Benjamin, R. Bielajew, N. de Boucaud, M. Calvo-Carrera, R. N. Chandra, H. Choudhury, Charles W. Cummings, Luca Corsaro, N. DaSilva, R. D. Diab, A. Devitre, S. Ferry, Samuel J. Frank, C. Hansen, J. Jerkins, Jeremiah D. Johnson, P. Lunia, John van de Lindt, Steven G. Mackie, Andrew Maris, Noah Mandell, Mark A. Miller, Theodore Mouratidis, A. Nelson, M. Pharr, Ethan Peterson, P. Rodriguez-Fernandez, Stefano Segantin, M. Tobin, A. Velberg, A M Wang, M. Wigram, J. Witham, C. Paz-Soldan, D.G. Whyte   +39 more
semanticscholar   +7 more sources

Effect of negative triangularity on tearing mode stability in tokamak plasmas [PDF]

Nuclear Fusion, 2023
The influence of negative triangularity (NT) of the plasma shape on the n = 1 (n is the toroidal mode number) tearing mode (TM) stability has been numerically investigated, with results compared to that of the positive triangularity (PT) counterpart.
Xu Yang, Yueqiang Liu, Wei Xu, Yuling He, Guoliang Xia   +4 more
doaj   +3 more sources

First-principle based predictions of the effects of negative triangularity on DTT scenarios [PDF]

Nuclear Fusion
Plasmas with negative triangularity (NT) shape have been recently shown to be able to achieve H-mode levels of confinement in L-mode, avoiding detrimental edge localised modes.
A. Mariani, A. Balestri, P. Mantica, G. Merlo, R. Ambrosino, L. Balbinot, D. Brioschi, I. Casiraghi, A. Castaldo, L. Frassinetti, V. Fusco, P. Innocente, O. Sauter, G. Vlad   +13 more
doaj   +3 more sources

Excitation of toroidal Alfvén eigenmode by energetic particles in DTT and effect of negative triangularity [PDF]

Nuclear Fusion
A linear gyrokinetic eigenvalue code is developed to study the stability of toroidal Alfvén eigenmode (TAE) in general axisymmetric toroidal geometry, with a self-consistent treatment of energetic particle drive and core plasma Landau damping in a non ...
Guangyu Wei, Fulvio Zonca, Matteo Valerio Falessi, Zhiyong Qiu   +3 more
doaj   +3 more sources

Assessment of vertical stability for negative triangularity pilot plants [PDF]

Plasma Physics and Controlled Fusion
Negative triangularity (NT) tokamak configurations may be more susceptible to magneto-hydrodynamic instability, posing challenges for recent reactor designs centered around their favorable properties, such as improved confinement and operation free of ...
S. Guizzo, A. Nelson, C. Hansen, F. Logak, C. Paz-Soldan   +4 more
semanticscholar   +5 more sources

Nonlinear gyrokinetic modelling of high confinement negative triangularity plasmas

Nuclear Fusion
Nonlinear gyrokinetic simulations correctly predict particle as well as ion and electron energy fluxes of high confinement plasmas with a negative triangularity cross sectional shape, showing that core transport in these plasmas is well described by ...
A. Marinoni, M.E. Austin, J. Candy, C. Chrystal, S.R. Haskey, M. Porkolab, J.C. Rost, F. Scotti   +7 more
doaj   +3 more sources

On the feasibility of Ohmically heated negative triangularity tokamak power plants

Nuclear Fusion
Negative triangularity (NT) plasmas achieve enhanced confinement without edge localized modes nor the need to exceed the L-H heating power threshold. Removing this H-mode accessibility constraint opens a new region of parameter space: scenarios with low ...
A. Balestri, J. Ball, S. Coda
doaj   +3 more sources

Characterization of the ELM-free negative triangularity edge on DIII-D

Plasma Physics and Controlled Fusion
Tokamak plasmas with strong negative triangularity (NT) shaping typically exhibit fundamentally different edge behavior than conventional L-mode or H-mode plasmas.
A. Nelson, L. Schmitz, T. Cote, J. F. Parisi, S. Stewart, C. Paz-Soldan, K. E. Thome, M. E. Austin, F. Scotti, J.L. Barr, A.W. Hyatt, N. Leuthold, A. Marinoni, Tom Neiser, T.H. Osborne, N.J. Richner, A.S. Welander, W Wehner, R.S. Wilcox, T. M. Wilks, J Yang, the DIII-D Team   +21 more
semanticscholar   +4 more sources