G
G.A. Navratil
Researcher at Columbia University
Publications - 67
Citations - 3591
G.A. Navratil is an academic researcher from Columbia University. The author has contributed to research in topics: Tokamak & Plasma. The author has an hindex of 30, co-authored 62 publications receiving 3388 citations. Previous affiliations of G.A. Navratil include General Atomics.
Papers
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Journal ArticleDOI
Chapter 3: MHD stability, operational limits and disruptions
T. C. Hender,J.C. Wesley,J.M. Bialek,Anders Bondeson,Allen H. Boozer,R.J. Buttery,Am Garofalo,Timothy Goodman,Robert Granetz,Y. Gribov,O. Gruber,Mikhail Gryaznevich,G. Giruzzi,Sibylle Günter,Nobuhiko Hayashi,Per Helander,Chris Hegna,D. F. Howell,D.A. Humphreys,G. T. A. Huysmans,A.W. Hyatt,Akihiko Isayama,Stephen Jardin,Yasunori Kawano,A. Kellman,C.E. Kessel,H. R. Koslowski,R. J. La Haye,E. Lazzaro,Yueqiang Liu,V.E. Lukash,J. Manickam,S. Medvedev,V. Mertens,S. V. Mirnov,Y. Nakamura,G.A. Navratil,M. Okabayashi,Takahisa Ozeki,Roberto Paccagnella,G. Pautasso,F. Porcelli,V. D. Pustovitov,V. Riccardo,M. Sato,Olivier Sauter,M.J. Schaffer,Michiya Shimada,Piergiorgio Sonato,E. J. Strait,M. Sugihara,Manabu Takechi,A. D. Turnbull,E. Westerhof,D.G. Whyte,R. Yoshino,H. Zohm +56 more
TL;DR: A review of recent advances in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed in this paper.
Journal ArticleDOI
Direct Observation of the Resistive Wall Mode in a Tokamak and Its Interaction with Plasma Rotation
Am Garofalo,A. D. Turnbull,Max E Austin,J.M. Bialek,Ming-Sheng Chu,K. J. Comer,E.D. Fredrickson,R. J. Groebner,R.J. La Haye,L.L. Lao,E. A. Lazarus,G.A. Navratil,T.H. Osborne,B. W. Rice,S.A. Sabbagh,J. T. Scoville,E. J. Strait,T. S. Taylor +17 more
TL;DR: Using newly developed techniques and improved diagnostics, rotating wall-stabilized discharges have been maintained in the DIII-D tokamak for 30 characteristic resistive wall decay times, significantly longer than was previously achieved.
Journal ArticleDOI
Active feedback stabilization of the resistive wall mode on the DIII-D device
M. Okabayashi,M. Okabayashi,J.M. Bialek,J.M. Bialek,M. S. Chance,M. S. Chance,Ming-Sheng Chu,E.D. Fredrickson,E.D. Fredrickson,Am Garofalo,Am Garofalo,M. Gryaznevich,R. Hatcher,R. Hatcher,Torkil H. Jensen,L. C. Johnson,L. C. Johnson,R.J. La Haye,E. A. Lazarus,E. A. Lazarus,M. A. Makowski,M. A. Makowski,J. Manickam,J. Manickam,G.A. Navratil,G.A. Navratil,J. T. Scoville,E. J. Strait,A. D. Turnbull,M.L. Walker +29 more
TL;DR: In this article, a proof of principle magnetic feedback stabilization experiment has been carried out to suppress the resistive wall mode (RWM), a branch of the ideal magnetohydrodynamic (MHD) kink mode under the influence of a stabilizing resistor wall, on the DIII-D tokamak device.
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.