J
J. Lawson
Researcher at Princeton Plasma Physics Laboratory
Publications - 8
Citations - 93
J. Lawson is an academic researcher from Princeton Plasma Physics Laboratory. The author has contributed to research in topics: Electric power system & Thyristor. The author has an hindex of 4, co-authored 8 publications receiving 80 citations.
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Journal ArticleDOI
Effect of plasma shaping on performance in the National Spherical Torus Experiment
D.A. Gates,R. Maingi,J.E. Menard,S.M. Kaye,S.A. Sabbagh,G. Taylor,James R. Wilson,M. G. Bell,R.E. Bell,S. Bernabei,J.M. Bialek,T. M. Biewer,W. R. Blanchard,J.A. Boedo,C.E. Bush,Mark D. Carter,Wonho Choe,Neal Crocker,D. S. Darrow,W. Davis,L. F. Delgado-Aparicio,S. J. Diem,J.R. Ferron,A. R. Field,J. Foley,E.D. Fredrickson,R. W. Harvey,R. Hatcher,William Heidbrink,K. W. Hill,J. C. Hosea,Thomas Jarboe,David W. Johnson,R. Kaita,C.E. Kessel,S. Kubota,H.W. Kugel,J. Lawson,B.P. LeBlanc,Kun-Chun Lee,Fred Levinton,J. Manickam,R.J. Maqueda,R. Marsala,D. Mastrovito,T. K. Mau,S. S. Medley,H. F. Meyer,D. R. Mikkelsen,Dennis Mueller,Tobin Munsat,Brian Nelson,C. Neumeyer,Nobuhiro Nishino,M. Ono,Hyeon K. Park,W. Park,S.F. Paul,W. A. Peebles,M. Peng,C. K. Phillips,A. Pigarov,R.I. Pinsker,Abhay K. Ram,S. Ramakrishnan,Roger Raman,David A Rasmussen,M. H. Redi,M.E. Rensink,G. Rewoldt,J. R. Robinson,P. Roney,Lane Roquemore,E. Ruskov,P.M. Ryan,H. Schneider,C.H. Skinner,David R. Smith,Aaron Sontag,Vlad Soukhanovskii,T. Stevenson,D.P. Stotler,B. C. Stratton,Dan Stutman,D.W. Swain,E. J. Synakowski,Yuichi Takase,K. Tritz,A. von Halle,M. R. Wade,Roscoe White,John B Wilgen,M. Williams,W. Zhu,Stewart Zweben,R. J. Akers,Peter Beiersdorfer,Riccardo Betti,T.S. Bigelow +98 more
TL;DR: The National Spherical Torus Experiment (NSTX) has explored the effects of shaping on plasma performance as determined by many diverse topics including the stability of global magnetohydrodynamic (MHD) modes (e.g., ideal external kinks and resistive wall modes), edge localized modes (ELMs), bootstrap current drive, divertor flux expansion, and heat transport.
Journal ArticleDOI
Progress toward commissioning and plasma operation in NSTX-U
M. Ono,J. Chrzanowski,L. Dudek,S.P. Gerhardt,P.J. Heitzenroeder,Robert Kaita,Jonathan Menard,E. Perry,T. Stevenson,R. Strykowsky,Peter Titus,A. von Halle,M. Williams,N.D. Atnafu,W. Blanchard,M. Cropper,Ahmed Diallo,David Gates,Robert Ellis,Keith Erickson,J. Hosea,R. Hatcher,S. Jurczynski,S.M. Kaye,G. Labik,J. Lawson,B.P. LeBlanc,R. Maingi,C. Neumeyer,Roger Raman,S. Raftopoulos,R. Ramakrishnan,A. L. Roquemore,S.A. Sabbagh,P. Sichta,H. Schneider,M. Smith,B. Stratton,Vlad Soukhanovskii,G. Taylor,K. Tresemer,A. Zolfaghari +41 more
TL;DR: The National Spherical Torus Experiment-Upgrade (NSTX-U) is the most powerful spherical torus facility at PPPL, Princeton USA as discussed by the authors, which is used to develop the physics basis for an ST-based Fusion Nuclear Science Facility (FNSF).
Journal ArticleDOI
Implementation of βN Control in the National Spherical Torus Experiment
S.P. Gerhardt,D. Mastrovito,M.G. Bell,M. Cropper,David Gates,Egemen Kolemen,J. Lawson,B. Marsala,Jonathan Menard,D. Mueller,T. Stevenson +10 more
TL;DR: Ono et al. as mentioned in this paper designed and constructed a system for control of the normalized B in the National Spherical Torus Experiment, where a PID operator is applied to the difference between the present value of B N (from real-time equilibrium reconstruction) and a time-dependent request, in order to calculate the required injected power.
Journal ArticleDOI
Magnetic diagnostics for equilibrium reconstruction and realtime plasma control in NSTX-Upgrade.
S.P. Gerhardt,Keith Erickson,Robert Kaita,J. Lawson,Robert Mozulay,D. Mueller,W. Que,Nabidur Rahman,H. Schneider,Gustav Smalley,Kelsey Tresemer +10 more
TL;DR: pects of magnetic diagnostics for realtime control in National Spherical Torus Experiment-Upgrade (NSTX-U) are described and an improved algorithm for estimating the plasma vertical velocity for feedback control is presented.
Proceedings ArticleDOI
Power system for NSTX upgrade
S. Ramakrishnan,C. Neumeyer,J. Lawson,R. Mozulay,E. Baker,R. Hatcher,N. Desai,W. Que,Xin Zhao +8 more
TL;DR: The National Spherical Torus Experiment (NSTX) as mentioned in this paper has been designed and installed in the existing facilities at Princeton Plasma Physic Laboratory (PPPL) and most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs.