J
J.G. Watkins
Researcher at Sandia National Laboratories
Publications - 253
Citations - 7811
J.G. Watkins is an academic researcher from Sandia National Laboratories. The author has contributed to research in topics: Divertor & Tokamak. The author has an hindex of 42, co-authored 241 publications receiving 7124 citations. Previous affiliations of J.G. Watkins include General Atomics.
Papers
More filters
Journal ArticleDOI
Suppression of large edge-localized modes in high-confinement DIII-D plasmas with a stochastic magnetic boundary.
Todd Evans,R.A. Moyer,P R Thomas,J.G. Watkins,T.H. Osborne,Jose Boedo,E. J. Doyle,Max E. Fenstermacher,K.H. Finken,R. J. Groebner,M. Groth,J. H. Harris,R.J. La Haye,C.J. Lasnier,Suguru Masuzaki,Nobuyoshi Ohyabu,D. G. Pretty,T. L. Rhodes,H. Reimerdes,D.L. Rudakov,M.J. Schaffer,G. Wang,Lei Zeng +22 more
TL;DR: Stochastic boundaries are compatible with H modes and may be attractive for ELM control in next-step fusion tokamaks, and the H mode transport barrier and core confinement are unaffected by the stochastic boundary.
Journal ArticleDOI
Beyond paradigm: Turbulence, transport, and the origin of the radial electric field in low to high confinement mode transitions in the DIII-D tokamak
R.A. Moyer,Keith H. Burrell,T. N. Carlstrom,Stefano Coda,Robert W. Conn,E. J. Doyle,P. Gohil,R. J. Groebner,J. Kim,R. Lehmer,W. A. Peebles,Miklos Porkolab,Curtis L. Rettig,T. L. Rhodes,R. P. Seraydarian,R. E. Stockdale,Daniel Thomas,George Tynan,J.G. Watkins +18 more
TL;DR: In this paper, the authors compared the predictions of the shear suppression of turbulence as the mechanism for the low to high confinement mode (L to H) transition by quantitative comparison with experimental results from the DIII-D tokamak.
Journal ArticleDOI
First tests of molybdenum mirrors for ITER diagnostics in DIII-D divertor
D.L. Rudakov,J.A. Boedo,R.A. Moyer,Andrey Litnovsky,V. Philipps,P. Wienhold,S.L. Allen,M.E. Fenstermacher,M. Groth,C.J. Lasnier,R. L. Boivin,N.H. Brooks,A.W. Leonard,W.P. West,C.P.C. Wong,Adam McLean,P.C. Stangeby,G. De Temmerman,William R. Wampler,J.G. Watkins +19 more
TL;DR: In this article, the first tests of molybdenum mirrors were performed in the DIII-D divertor under deposition-dominated conditions, and two sets of mirrors recessed 2 cm below the divertor floor in the private flux region were exposed to a series of identical, lower-single-null, ELMing (featuring edge localized modes) H-mode discharges with detached plasma conditions in both divertor legs.
Journal ArticleDOI
Loss of energetic beam ions during TAE instabilities
TL;DR: Toroidicity induced Alfven eigenmodes (TAE) were observed in the DIII-D tokamak when energetic beam ions (approximately 75 keV) are used to destabilize the mode as mentioned in this paper.
Journal ArticleDOI
Physics of the L-mode to H-mode transition in tokamaks
Keith H. Burrell,T. N. Carlstrom,E. J. Doyle,D. F. Finkenthal,P. Gohil,R. J. Groebner,D. L. Hillis,J.S. Kim,H. Matsumoto,R.A. Moyer,T.H. Osborne,Curtis L. Rettig,W. A. Peebles,T. L. Rhodes,H. Stjohn,R.D. Stambaugh,M. R. Wade,J.G. Watkins +17 more
TL;DR: In this article, the basic paradigm of electric field shear stabilization has been discussed in the light of the most recent data, and the experimental results with various theories have been compared.