L
L. C. Johnson
Researcher at Princeton University
Publications - 14
Citations - 372
L. C. Johnson is an academic researcher from Princeton University. The author has contributed to research in topics: Plasma & Tokamak. The author has an hindex of 10, co-authored 14 publications receiving 367 citations.
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Journal ArticleDOI
Overview of TFTR transport studies
R. J. Hawryluk,V. Arunasalam,Cris W. Barnes,Michael A. Beer,M. G. Bell,R. E. Bell,H. Biglari,Manfred Bitter,R. Boivin,N. Bretz,Robert Budny,C.E. Bush,Chio-Zong Cheng,T. K. Chu,Samuel A. Cohen,Steven Cowley,P. C. Efhimion,R.J. Fonck,E.D. Fredrickson,Harold P. Furth,Robert James Goldston,G. Greene,B. Grek,L. R. Grisham,Gregory W. Hammett,William Heidbrink,K. W. Hill,J.C. Hosea,R. A. Hulse,H. Hsuan,A.C. Janos,D.L. Jassby,F. C. Jobes,David W. Johnson,L. C. Johnson,Jay Kesner,C. Kieras‐Phillips,S. J. Kilpatrick,H.W. Kugel,P.H. La Marche,B. LeBlanc,Dennis M. Manos,D. K. Mansfield,E.S. Marmar,E. Mazzucato,M. McCarthy,Michael E. Mauel,D. C. McCune,K. McGuire,Dale Meade,S. S. Medley,D. R. Mikkelsen,D. A. Monticello,R. W. Motley,D. Mueller,Yoshio Nagayama,G.A. Navratil,Raffi Nazikian,D. K. Owens,Hyeon K. Park,W. Park,S. Paul,F. W. Perkins,S. Pitcher,A. T. Ramsey,M. H. Redi,G. Rewoldt,D. Roberts,A. L. Roquemore,P. H. Rutherford,S.A. Sabbagh,G. Schilling,J.F. Schivell,G. L. Schmidt,S. D. Scott,Joseph Snipes,J. E. Stevens,Brentley Stratton,W. Stodiek,E. J. Synakowski,Yuichi Takase,William Tang,G. Taylor,J.L. Terry,J. Timberlake,H. H. Towner,M. Ulrickson,S. von Goeler,R. M. Wieland,M. Williams,J. R. Wilson,K. L. Wong,Masaaki Yamada,S. Yoshikawa,K. M. Young,M. C. Zarnstorff,S. J. Zweben +96 more
TL;DR: A review of TFTR plasma transport studies is presented in this article, where parallel transport and the confinement of suprathermal ions are found to be relatively well described by theory and the underlying turbulence has been studied using microwave scattering, beam emission spectroscopy and microwave reflectometry over a much broader range in k perpendicular to than previously possible.
Journal ArticleDOI
Confinement studies of neutral beam heated discharges in TFTR
M. Murakami,V. Arunasalam,J. D. Bell,M. G. Bell,Manfred Bitter,W. R. Blanchard,F.P. Boody,N. Bretz,Robert Budny,C. E. Bush,J. D. Callen,Joseph L. Cecchi,Samuel Cohen,R. J. Colchin,S.K. Combs,J. Coonrod,S. L. Davis,D. Dimock,H. F. Dylla,P. C. Efthimion,L. C. Emerson,A. C. England,H.P. Eubank,R. J. Fonck,E.D. Fredrickson,Harold P. Furth,L. R. Grisham,S. von Goeler,Robert James Goldston,B. Grek,R. Groebner,R. J. Hawryluk,H. W. Hendel,K. W. Hill,D. L. Hillis,W. W. Heidbrink,R. A. Hulse,David W. Johnson,L. C. Johnson,R. Kaita,R. Kamperschroer,Stanley Kaye,S. J. Kilpatrick,H.W. Kugel,P. H. LaMarche,R. Little,C. H. Ma,Dennis M. Manos,D. K. Mansfield,M. McCarthy,R. T. McCann,D. C. McCune,K. McGuire,Dale Meade,S. S. Medley,S. L. Milora,D. R. Mikkelsen,D. Mueller,E. Nieschmidt,D. K. Owens,V. K. Pare,Hyeon K. Park,B. Prichard,A. T. Ramsey,David A Rasmussen,M. H. Redi,A. L. Roquemore,P.H. Rutherford,N. R. Sauthoff,J.F. Schivell,G. L. Schmidt,S. D. Scott,S. Sesnic,M. Shimada,J. E. Simpkins,J. Sinnis,F. Stauffer,J. D. Strachan,Brentley Stratton,G. D. Tait,G. Taylor,C. E. Thomas,H. H. Towner,M. Ulrickson,R. M. Wieland,J. B. Wilgen,M. Williams,K. L. Wong,S. Yoshikawa,K. M. Young,M. C. Zarnstorff,S. J. Zweben +91 more
TL;DR: The TFTR tokamak has reached its original machine design specifications (Ip=2.5 MA and BT=5.2 T) by operating at low plasma current and low density (ne approximately=1*1019 m-3), high ion temperatures (9+or2 keV) and rotation speeds (7*105 m/s) have been achieved during injection.
Journal ArticleDOI
Plasma-material interactions in TFTR
H. F. Dylla,Team Tftr Team,M. G. Bell,W. R. Blanchard,P. P. Boody,N. Bretz,Robert Budny,C. E. Bush,Joseph L. Cecchi,Samuel A. Cohen,S.K. Combs,S. L. Davis,B. L. Doyle,P. C. Efthimion,A. C. England,H.P. Eubank,R. J. Fonck,E.D. Fredrickson,L. R. Grisham,Robert James Goldston,B. Grek,R. Groebner,R. J. Hawryluk,D.B. Heifetz,H. W. Hendel,K. W. Hill,S. Hiroe,R. A. Hulse,David W. Johnson,L. C. Johnson,S. J. Kilpatrick,P. H. LaMarche,R. Little,Dennis M. Manos,D. K. Mansfield,Dale Meade,S. S. Medley,S. L. Milora,D. R. Mikkelsen,D. Mueller,M. Murakami,E. Nieschmidt,O. K. Owens,Hyeon K. Park,A.E. Pontau,B. Prichard,A. T. Ramsey,M. H. Redi,J.F. Schivell,G. L. Schmidt,S. D. Scott,S. Sesnic,M. Shimada,J. E. Simpkins,J. Sinnis,F. Stauffer,Brentley Stratton,G. D. Tait,G. Taylor,M. Ulrickson,S. von Goeler,W. R. Wampler,K. Wilson,M. Williams,K. L. Wong,K. M. Young,M. C. Zarnstorff,S. J. Zweben +67 more
TL;DR: In this paper, a summary of plasma-material interactions which influence the operation of TFTR with high current (≤ 2.2 MA) ohmically heated, and high power (∼ 10 MW) neutral-beam heated plasmas is presented.
Journal ArticleDOI
Correlations of heat and momentum transport in the TFTR tokamak
S. D. Scott,V. Arunasalam,Cris W. Barnes,Cris W. Barnes,M. G. Bell,Manfred Bitter,R. Boivin,N. Bretz,Robert Budny,C. E. Bush,C. E. Bush,A. Cavallo,T. K. Chu,Samuel Cohen,P. Colestock,S. L. Davis,D. Dimock,H. F. Dylla,P. C. Efthimion,A. B. Erhrardt,R. J. Fonck,R. J. Fonck,E.D. Fredrickson,Harold P. Furth,Robert James Goldston,G. Greene,B. Grek,L. R. Grisham,Gregory W. Hammett,R. J. Hawryluk,H. W. Hendel,K. W. Hill,Einar Hinnov,D. J. Hoffman,D. J. Hoffman,J. Hosea,R. B. Howell,R. B. Howell,H. Hsuan,R. A. Hulse,K. P. Jaehnig,K. P. Jaehnig,A. C. Janos,D.L. Jassby,F. C. Jobes,David W. Johnson,L. C. Johnson,R. Kaita,C. Kieras‐Phillips,S. J. Kilpatrick,P. H. LaMarche,B. LeBlanc,R. Little,Dennis M. Manos,D. K. Mansfield,E. Mazzucato,M. McCarthy,D. C. McCune,K. McGuire,D. H. McNeill,Dale Meade,S. S. Medley,D. R. Mikkelsen,R. W. Motley,D. Mueller,J. A. Murphy,Y. Nagayama,Y. Nagayama,R. Nazakian,D. K. Owens,Hyeon K. Park,A. T. Ramsey,M. H. Redi,A. L. Roquemore,P. H. Rutherford,G. Schilling,J.F. Schivell,G. L. Schmidt,J. E. Stevens,Brentley Stratton,W. Stodiek,E. J. Synakowski,William Tang,G. Taylor,J. Timberlake,H. H. Towner,M. Ulrickson,S. von Goeler,R. M. Wieland,M. Williams,J. R. Wilson,K. L. Wong,S. Yoshikawa,K. M. Young,M. C. Zarnstorff,S. J. Zweben +95 more
TL;DR: In this paper, the toroidal rotation speed vφ(r) driven by neutral beam injection in tokamak plasmas and, in particular, simultaneous profile measurements have provided new insights into the nature of anomalous transport in TOkamaks.
Journal ArticleDOI
High-beta operation and magnetohydrodynamic activity on the TFTR tokamak
K. McGuire,V. Arunasalam,Cris W. Barnes,M. G. Bell,Manfred Bitter,R. Boivin,N. Bretz,Robert Budny,C. E. Bush,A. Cavallo,T. K. Chu,Samuel A. Cohen,P. Colestock,S. L. Davis,D. Dimock,H. F. Dylla,P. C. Efthimion,A. B. Ehrhrardt,R. J. Fonck,E.D. Fredrickson,Harold P. Furth,G. Gammel,Robert James Goldston,G. Greene,B. Grek,L. R. Grisham,Gregory W. Hammett,R. J. Hawryluk,H. W. Hendel,K. W. Hill,Einar Hinnov,D. J. Hoffman,J.C. Hosea,R. B. Howell,H. Hsuan,R. A. Hulse,A. C. Janos,D.L. Jassby,F. C. Jobes,David W. Johnson,L. C. Johnson,R. Kaita,C. Kieras‐Phillips,S. J. Kilpatrick,P. H. LaMarche,B. LeBlanc,Dennis M. Manos,D. K. Mansfield,E. Mazzucato,M. McCarthy,M. C. McCune,D. H. McNeill,Dale Meade,S. S. Medley,D. R. Mikkelsen,D. Monticello,R. W. Motley,D. Mueller,J. A. Murphy,Y. Nagayama,D. R. Nazakian,E. B. Neischmidt,D. K. Owens,Hyeon K. Park,W. Park,S. Pitcher,A. T. Ramsey,M. H. Redi,A. L. Roquemore,P. H. Rutherford,G. Schilling,J.F. Schivell,G. L. Schmidt,S. D. Scott,J. Sinnis,J. E. Stevens,Brentley Stratton,W. Stodiek,E. J. Synakowski,William Tang,G. Taylor,J. Timberlake,H. H. Towner,M. Ulrickson,S. von Goeler,R. M. Wieland,M. Williams,J. R. Wilson,K. L. Wong,Masaaki Yamada,S. Yoshikawa,K. M. Young,M. C. Zarnstorff,Stewart Zweben +93 more
TL;DR: In this paper, the authors studied the magnetic reconnection in TFTR tokamak plasmas and found that the shape of the q profile is a good indicator of the presence of sawteeth.