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A. D. Turnbull
Researcher at General Atomics
Publications - 104
Citations - 4268
A. D. Turnbull is an academic researcher from General Atomics. The author has contributed to research in topics: Tokamak & DIII-D. The author has an hindex of 39, co-authored 103 publications receiving 4063 citations.
Papers
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Journal ArticleDOI
Edge localized modes and the pedestal: A model based on coupled peeling–ballooning modes
P. B. Snyder,H. R. Wilson,J.R. Ferron,L. L. Lao,Anthony Leonard,T.H. Osborne,A. D. Turnbull,D. A. Mossessian,Masakatsu Murakami,Xueqiao Xu +9 more
TL;DR: In this paper, a model based on magnetohydrodynamic stability of the tokamak plasma edge region is presented, which describes characteristics of edge localized modes (ELMs) and the pedestal.
Journal ArticleDOI
Sustained rotational stabilization of DIII-D plasmas above the no-wall beta limit
Am Garofalo,Torkil H. Jensen,L. C. Johnson,R.J. La Haye,Gerald Navratil,M. Okabayashi,J. T. Scoville,E. J. Strait,D.R. Baker,J.M. Bialek,Ming-Sheng Chu,J.R. Ferron,J. Jayakumar,L.L. Lao,M. A. Makowski,H. Reimerdes,T. S. Taylor,A. D. Turnbull,M. R. Wade,S. K. Wong +19 more
TL;DR: In this paper, the authors demonstrated that a resonant response to error fields in a plasma approaching marginal stability to a low-n kink mode leads to strong damping of the toroidal rotation, precisely in the high-beta regime where it is needed for stabilization.
Journal ArticleDOI
Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks
Robert L. Miller,Y. R. Lin-Liu,A. D. Turnbull,Vincent Chan,L. D. Pearlstein,Olivier Sauter,Laurent Villard +6 more
TL;DR: In this article, a range of equilibria at aspect ratio 1.4 were systematically explored by varying the pressure profile and shape, and the highest beta case was shown to be stable to n=0,1,2,3 kink modes with a conducting wall.
Journal ArticleDOI
Rotational and magnetic shear stabilization of magnetohydrodynamic modes and turbulence in DIII‐D high performance discharges
L.L. Lao,K. H. Burrell,T. S. Casper,Vincent Chan,Ming-Sheng Chu,J.C. DeBoo,E. J. Doyle,R. Durst,Cary Forest,C. M. Greenfield,R. J. Groebner,F.L. Hinton,Y. Kawano,E. A. Lazarus,Y. R. Lin-Liu,Michael E. Mauel,W.H. Meyer,R. L. Miller,G.A. Navratil,T.H. Osborne,Q. Peng,Curtis L. Rettig,G. Rewoldt,T. L. Rhodes,B. W. Rice,D.P. Schissel,B. W. Stallard,E. J. Strait,William Tang,T. S. Taylor,A. D. Turnbull,R. E. Waltz +31 more
TL;DR: In this article, the confinement and stability properties of the DIII-D tokamak high performance discharges are evaluated in terms of rotational and magnetic shear with emphasis on the recent experimental results obtained from the negative central magnet shear (NCS) experiments.
Journal ArticleDOI
Higher Fusion Power Gain with Current and Pressure Profile Control in Strongly Shaped DIII-D Tokamak Plasmas.
E. A. Lazarus,G.A. Navratil,C. M. Greenfield,E. J. Strait,Max E Austin,K. H. Burrell,T.A. Casper,D.R. Baker,J.C. DeBoo,E. J. Doyle,R. Durst,J.R. Ferron,Cary Forest,P. Gohil,R. J. Groebner,William Heidbrink,R.M. Hong,Wayne A Houlberg,A.W. Howald,C. L. Hsieh,A.W. Hyatt,G.L. Jackson,J.S. Kim,L.L. Lao,C.J. Lasnier,Anthony Leonard,J.M. Lohr,R.J. La Haye,R. Maingi,R. L. Miller,M. Murakami,T.H. Osborne,L.J. Perkins,Cc Petty,Curtis L. Rettig,T. L. Rhodes,B. W. Rice,S.A. Sabbagh,D.P. Schissel,J. T. Scoville,R. T. Snider,G. M. Staebler,B. W. Stallard,R.D. Stambaugh,H.E. St. John,R. E. Stockdale,P. L. Taylor,Daniel Thomas,A. D. Turnbull,M. R. Wade,R. D. Wood,D.G. Whyte +51 more
TL;DR: Fusion power has been increased by a factor of 3 in DIII-D by tailoring the pressure profile to avoid the kink instability in H-mode plasmas by controlling the plasma pressure profile width.