F
Fred Levinton
Researcher at Princeton University
Publications - 159
Citations - 5823
Fred Levinton is an academic researcher from Princeton University. The author has contributed to research in topics: Plasma & Tokamak. The author has an hindex of 42, co-authored 156 publications receiving 5565 citations. Previous affiliations of Fred Levinton include Princeton Plasma Physics Laboratory.
Papers
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Journal ArticleDOI
Improved confinement with reversed magnetic shear in TFTR.
Fred Levinton,M. C. Zarnstorff,S. H. Batha,M.G. Bell,R. E. Bell,Robert Budny,C.E. Bush,Z. Chang,E.D. Fredrickson,A. Janos,J. Manickam,A. T. Ramsey,S.A. Sabbagh,G. L. Schmidt,E. J. Synakowski,G. Taylor +15 more
TL;DR: In this paper, a new tokamak confinement regime has been observed on the Tokamak Fusion Test Reactor (TFTR), where particle and ion thermal diffusivities drop precipitously by a factor of \ensuremath{\sim}40 to the neoclassical level for the particles and to much less than the NE value for the ions in the region with reversed shear.
Journal ArticleDOI
Magnetic field pitch-angle measurments in the PBX-M tokamak using the motional Stark effect.
TL;DR: Polarimetry measurements of the Doppler-shifted H{sub {alpha}} emission from a neutral hydrogen beam on the PBX-M tokamak have been employed in a novel technique for obtaining {ital q}({ital r}) and magnetic field pitch-angle profiles using the Stark effect.
Journal ArticleDOI
Observation of plasma toroidal-momentum dissipation by neoclassical toroidal viscosity.
W. Zhu,Steven Sabbagh,R. E. Bell,J.M. Bialek,M.G. Bell,B.P. LeBlanc,Stanley Kaye,Fred Levinton,Jonathan Menard,Ker-Chung Shaing,Aaron Sontag,Howard Yuh +11 more
TL;DR: Quantitative agreement between experiment and theory is found when the effect of toroidally trapped particles is included and the measured decrease of the plasma toroidal angular momentum profile is compared to calculations of nonresonant drag torque based on the theory of neoclassical toroidal viscosity.
Journal ArticleDOI
Turbulent Fluctuations in TFTR Configurations with Reversed Magnetic Shear.
E. Mazzucato,S. H. Batha,Michael A. Beer,M.G. Bell,R. E. Bell,Robert Budny,C.E. Bush,T.S. Hahm,Gregory W. Hammett,Fred Levinton,Raffi Nazikian,Hyeon K. Park,G. Rewoldt,G. L. Schmidt,E. J. Synakowski,William Tang,G. Taylor,M. C. Zarnstorff +17 more
TL;DR: Turbulent fluctuations in plasmas with reversed magnetic shear investigated on the Tokamak Fusion Test Reactor are found to be consistent with the suppression of turbulence by the E x B velocity shear.
Journal ArticleDOI
Enhancement of Tokamak Fusion Test Reactor performance by lithium conditioning
D.K. Mansfield,K. W. Hill,J. D. Strachan,M. G. Bell,S. D. Scott,Robert Budny,E.S. Marmar,J. A. Snipes,J. L. Terry,S. H. Batha,R.E. Bell,Manfred Bitter,C.E. Bush,Z. Chang,D. S. Darrow,D.R. Ernst,E.D. Fredrickson,B. Grek,H. W. Herrmann,A.C. Janos,D. L. Jassby,F. C. Jobes,David W. Johnson,L. C. Johnson,Fred Levinton,D. R. Mikkelsen,D. Mueller,D. K. Owens,Hyeon K. Park,A. T. Ramsey,A. L. Roquemore,C.H. Skinner,T. Stevenson,B. C. Stratton,E. J. Synakowski,G. Taylor,A. von Halle,S. von Goeler,K. L. Wong,S. J. Zweben +39 more
TL;DR: Mc McGuire et al. as discussed by the authors showed that the amount of lithium on the limiter and the effectiveness of its action can be maximized through injecting four Li pellets into Ohmic plasmas of increasing major and minor radius.