E
E.D. Fredrickson
Researcher at Princeton Plasma Physics Laboratory
Publications - 332
Citations - 11142
E.D. Fredrickson is an academic researcher from Princeton Plasma Physics Laboratory. The author has contributed to research in topics: Tokamak & Tokamak Fusion Test Reactor. The author has an hindex of 55, co-authored 324 publications receiving 10544 citations. Previous affiliations of E.D. Fredrickson include General Atomics & Princeton University.
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
Observation of nonlinear neoclassical pressure-gradient-driven tearing modes in TFTR.
Z. Chang,James D. Callen,E.D. Fredrickson,Robert Budny,Chris Hegna,K. McGuire,M. C. Zarnstorff +6 more
TL;DR: A detailed comparison is made between the tearing-type modes observed in TFTR supershot plasmas and the nonlinear, neoclassical pressure-gradient--driven tearing mode theory, finding good agreement on the non linear evolution of single helicity magnetic islands.
Journal ArticleDOI
Excitation of toroidal Alfvén eigenmodes in TFTR.
K. L. Wong,R. J. Fonck,S. F. Paul,D. Roberts,E.D. Fredrickson,Raffi Nazikian,Hyeon K. Park,M.G. Bell,N. L. Bretz,Robert Budny,Samuel A. Cohen,Gregory W. Hammett,F. C. Jobes,Dale Meade,S. S. Medley,D. Mueller,Yoshio Nagayama,D.K. Owens,E. J. Synakowski +18 more
TL;DR: Deuterium neutral beams with energies up to 110 keV were injected into TFTR (Tokamak Fusion Test Reactor) plasmas at low magnetic field such that the beam injection velocities were comparable to the Alfven velocity.
Journal ArticleDOI
Equilibrium properties of spherical torus plasmas in NSTX
Steven Sabbagh,Stanley Kaye,Jonathan Menard,F. Paoletti,M.G. Bell,R. E. Bell,J.M. Bialek,Manfred Bitter,E.D. Fredrickson,D.A. Gates,Alan H. Glasser,H.W. Kugel,L. L. Lao,B.P. LeBlanc,R. Maingi,Ricardo Maqueda,E. Mazzucato,D. Mueller,Masayuki Ono,S.F. Paul,M. Peng,C.H. Skinner,Dan Stutman,G. A. Wurden,W. Zhu +24 more
TL;DR: In this paper, the evolution of the plasma equilibrium between discharges is analyzed with an automated version of the EFIT code and reconstructed magnetic signals are fitted to the corresponding measured values with low errors.
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.