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
Deuterium–tritium high confinement (H‐mode) studies in the Tokamak Fusion Test Reactor
C.E. Bush,S.A. Sabbagh,Stewart Zweben,R.E. Bell,E. J. Synakowski,G. Taylor,S. H. Batha,M. G. Bell,Manfred Bitter,N. L. Bretz,R.V. Budny,Z. Chang,D. S. Darrow,P. C. Efthimion,D.R. Ernst,E.D. Fredrickson,G. R. Hanson,L. C. Johnson,Jay Kesner,B.P. LeBlanc,Fred Levinton,D.K. Mansfield,Michael E. Mauel,E. Mazzucato,D.C. McCune,Masakatsu Murakami,Raffi Nazikian,G.A. Navratil,Hyeon K. Park,S.F. Paul,C. K. Phillips,M. H. Redi,J.F. Schivell,S. D. Scott,C.H. Skinner,H. H. Towner,John B Wilgen,M. C. Zarnstorff +37 more
TL;DR: McGuire et al. as mentioned in this paper obtained high or enhanced confinement (H•mode) plasmas with nearly equal concentrations of deuterium and tritium in high-temperature, high poloidal beta-plasmas in the Tokamak Fusion Test Reactor.
Journal ArticleDOI
Production and identification of a collisionless, curvature-driven, trapped-particle instability
TL;DR: In this article, the Columbia Linear Machine has been redesigned to enter the parameter regime of the collisionless, curvature-driven, trapped-particle instability, and coherent mode is observed which bears all the characteristics of this instability.
Journal ArticleDOI
Design optimization for plasma performance and assessment of operation regimes in JT-60SA
Takaaki Fujita,Hiroshi Tamai,Makoto Matsukawa,G. Kurita,J.M. Bialek,Nobuyuki Aiba,Katsuhiko Tsuchiya,Shinji Sakurai,Yoshio Suzuki,Kiyotaka Hamamatsu,Nobuhiko Hayashi,Naoyuki Oyama,T. Suzuki,G.A. Navratil,Yutaka Kamada,Y. Miura,Yuichi Takase,David Campbell,J. Pamela,Francesco Romanelli,Mitsuru Kikuchi +20 more
TL;DR: In this paper, the design of the modification of JT-60U, JT60SA has been optimized from the viewpoint of plasma performance, and operation regimes have been evaluated with the latest design.
Journal ArticleDOI
Experimental exploration of profile control in the Princeton Beta Experiment-Modified (PBX-M) tokamak
S. Bernabei,R.E. Bell,M. S. Chance,T. K. Chu,M. Corneliussen,W. Davis,G. Gettlefinger,T. Gibney,N. Greenough,R. Hatcher,H. W. Hermann,D. Ignat,Stephen Jardin,Robert Kaita,S.M. Kaye,C.E. Kessel,T. Kozub,H.W. Kugel,L. Lagin,B.P. LeBlanc,J. Manickam,M. Okabayashi,H. Oliver,M. Ono,S.F. Paul,S. Preische,P. Roney,N. R. Sauthoff,S. Schweitzer,S. Sesnic,Y. Sun,H. Takahashi,W. Tighe,E. Valeo,S. von Goeler,K. Voss,Michael E. Mauel,G.A. Navratil,R. Cesario,S. H. Batha,F. M. Levinton,F. Rimini,Nobuyuki Asakura,S. Jones,Jay Kesner,S. Luckhardt,F. Paoletti,P. Woskow,A. Zolfaghari,Tetsuo Seki,J. Bell,J. Dunlap,A. England,D. Greenwood,J. Harris,G. Henkel,S. Hirschman,R. Isler,D. Lee,L. Blush,Robert W. Conn,R.P. Doerner,Y. Hirooka,R. Lehmer,L. W. Schmitz,George Tynan +65 more
TL;DR: The experimental program of the Princeton Beta Experiment•Modified (PBX•M) tokamak [Phys. B2, 1271 (1990)] is directed toward tailoring plasma profiles to achieve greater stability and confinement and to gain access to the second stability region as discussed by the authors.
Journal ArticleDOI
Tokamak Operation with Safety Factor q 95 < 2 via Control of MHD Stability
P. Piovesan,Jeremy Hanson,Piero Martin,G.A. Navratil,Francesca Turco,J.M. Bialek,Nathaniel Ferraro,R.J. La Haye,M.J. Lanctot,M. Okabayashi,Carlos Paz-Soldan,E. J. Strait,A. D. Turnbull,Paolo Zanca,M. Baruzzo,Tommaso Bolzonella,A.W. Hyatt,G.L. Jackson,L. Marrelli,L. Piron,Daisuke Shiraki +20 more
TL;DR: DIII-D opens a whole new high-current regime not accessible before, which brings significant possible benefits in terms of fusion performance, but it also extends resistive-wall mode physics and its control to conditions never explored before.