R
Roger Raman
Researcher at University of Washington
Publications - 138
Citations - 2206
Roger Raman is an academic researcher from University of Washington. The author has contributed to research in topics: Tokamak & Divertor. The author has an hindex of 27, co-authored 138 publications receiving 1980 citations.
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Journal ArticleDOI
Overview of physics results from MAST
Roger Raman,Joon-Wook Ahn,Jean Paul Allain,R. Andre,Robert Bastasz,D. J. Battaglia,Peter Beiersdorfer,M.G. Bell,R. E. Bell,Elena Belova,John Berkery,Riccardo Betti,Riccardo Betti,J.M. Bialek,T.S. Bigelow,Manfred Bitter,J.A. Boedo,P.T. Bonoli,Allen H. Boozer,A. Bortolon,Dylan Brennan,J. Breslau,R. J. Buttery,John Canik,G. Caravelli,Choong-Seock Chang,Neal Crocker,D. S. Darrow,W. Davis,L. F. Delgado-Aparicio,Ahmed Diallo,S. Ding,D. A. D'Ippolito,Calvin Domier,William Dorland,S. Ethier,Todd Evans,J.R. Ferron,Michael Finkenthal,J. Foley,R.J. Fonck,R. Frazin,E.D. Fredrickson,Guoyong Fu,David Gates,S.P. Gerhardt,Alan H. Glasser,Nikolai Gorelenkov,T.K. Gray,Y. Guo,W. Guttenfelder,T.S. Hahm,R. W. Harvey,Ahmed Hassanein,William Heidbrink,K. W. Hill,Yoshiki Hirooka,E. B. Hooper,J. C. Hosea,B. Hu,D.A. Humphreys,K. Indireshkumar,F. Jaeger,Thomas Jarboe,Stephen Jardin,Michael Jaworski,Robert Kaita,J. Kallman,O. Katsuro-Hopkins,Stanley Kaye,C.E. Kessel,J. Kim,Egemen Kolemen,Sergei Krasheninnikov,S. Kubota,H.W. Kugel,R.J. La Haye,L.L. Lao,B.P. LeBlanc,Woochang Lee,K. C. Lee,J.A. Leuer,Fred Levinton,Y. Liang,D. Liu,Neville C. Luhmann,Rajesh Maingi,Richard Majeski,J. Manickam,D.K. Mansfield,R.J. Maqueda,E. Mazzucato,Adam McLean,D.C. McCune,B. McGeehan,George McKee,S. S. Medley,Jonathan Menard,M. Menon,H. F. Meyer,D. R. Mikkelsen,Gennady V. Miloshevsky,D. Mueller,Tobin Munsat,J.R. Myra,Brian Nelson,Nobuhiro Nishino,R. Nygren,Masayuki Ono,T.H. Osborne,Hyeon K. Park,Jong-Kyu Park,S.F. Paul,W. A. Peebles,B.G. Penaflor,C. K. Phillips,A. Pigarov,Mario Podesta,Josef Preinhaelter,Y. Ren,H. Reimerdes,G. Rewoldt,P. W. Ross,Clarence Worth Rowley,E. Ruskov,D. Russell,David N. Ruzic,P.M. Ryan,S.A. Sabbagh,M.J. Schaffer,Eugenio Schuster,Filippo Scotti,Ker-Chung Shaing,Vladimir Shevchenko,Kouji Shinohara,Valeryi Sizyuk,C.H. Skinner,Alexander Smirnov,David R. Smith,P. B. Snyder,W. M. Solomon,Aaron Sontag,V. A. Soukhanovskii,T. Stoltzfus-Dueck,D.P. Stotler,B. Stratton,Dan Stutman,H. Takahashi,Yuichi Takase,Naoki Tamura,Xian-Zhu Tang,Chase N. Taylor,G. Taylor,C. Taylor,Kevin Tritz,D. Tsarouhas,Maxim Umansky,Jakub Urban,M.L. Walker,William R. Wampler,W. X. Wang,J. Whaley,Roscoe White,John B Wilgen,R. Wilson,K.L. Wong,John Wright,Z. Xia,Dennis L. Youchison,Guoqin Yu,H. Yuh,Leonid E. Zakharov,D. Zemlyanov,G. Zimmer,Stewart Zweben +174 more
TL;DR: In this article, the influence of the q-profile and E x B flow shear on transport has been studied in MAST and equilibrium flow shears has been included in gyro-kinetic codes, improving comparisons with the experimental data.
Journal ArticleDOI
Overview of physics results from the conclusive operation of the National Spherical Torus Experiment
S.A. Sabbagh,Joon-Wook Ahn,Jean Paul Allain,R. Andre,A. Balbaky,Robert Bastasz,D. J. Battaglia,M.G. Bell,R.E. Bell,Peter Beiersdorfer,Elena Belova,John Berkery,Riccardo Betti,J.M. Bialek,T.S. Bigelow,Manfred Bitter,J.A. Boedo,P.T. Bonoli,Allen H. Boozer,Alessandro Bortolon,Dennis Boyle,Dylan Brennan,J. Breslau,R. J. Buttery,John Canik,G. Caravelli,Choong-Seock Chang,Neal Crocker,D. S. Darrow,B. Davis,L. F. Delgado-Aparicio,Ahmed Diallo,S. Ding,D.A. D'Ippolito,Calvin Domier,William Dorland,Stephane Ethier,Todd Evans,J.R. Ferron,Michael Finkenthal,J. Foley,R.J. Fonck,R. Frazin,E.D. Fredrickson,Guoyong Fu,David Gates,S.P. Gerhardt,A. H. Glasser,Nikolai Gorelenkov,T.K. Gray,Y. Guo,W. Guttenfelder,T.S. Hahm,R. W. Harvey,Ahmed Hassanein,William Heidbrink,K. W. Hill,Y. Hirooka,E. B. Hooper,J. Hosea,D.A. Humphreys,K. Indireshkumar,F. Jaeger,Thomas Jarboe,Stephen Jardin,Michael Jaworski,Robert Kaita,J. Kallman,O. Katsuro-Hopkins,S.M. Kaye,C.E. Kessel,J. Kim,Egemen Kolemen,G. J. Kramer,Sergei Krasheninnikov,S. Kubota,H.W. Kugel,R.J. La Haye,L.L. Lao,B.P. LeBlanc,Woochang Lee,Kun-Chun Lee,J.A. Leuer,Fred Levinton,Y. Liang,D. W. Liu,Jeremy Lore,Neville C. Luhmann,Rajesh Maingi,Richard Majeski,J. Manickam,D.K. Mansfield,R.J. Maqueda,E. Mazzucato,Adam McLean,D.C. McCune,B. McGeehan,George McKee,S. S. Medley,E.T. Meier,Jonathan Menard,M.M. Menon,Harry M. Meyer,D. R. Mikkelsen,Gennady V. Miloshevsky,D. Mueller,Tobin Munsat,J.R. Myra,B. A. Nelson,Nobuhiro Nishino,Richard E. Nygren,M. Ono,T.H. Osborne,Hyeon K. Park,Jinseop Park,Y. S. Park,S.F. Paul,W. A. Peebles,B.G. Penaflor,Rory Perkins,C. K. Phillips,A. Pigarov,Mario Podesta,Josef Preinhaelter,Roger Raman,Yang Ren,G. Rewoldt,T.D. Rognlien,P. W. Ross,Clarence Worth Rowley,E. Ruskov,D. A. Russell,David N. Ruzic,P.M. Ryan,M.J. Schaffer,Eugenio Schuster,Filippo Scotti,Ker-Chung Shaing,Vladimir Shevchenko,Kouji Shinohara,Valeryi Sizyuk,C.H. Skinner,Alexander Smirnov,David R. Smith,P. B. Snyder,W. M. Solomon,Aaron Sontag,Vlad Soukhanovskii,T. Stoltzfus-Dueck,D.P. Stotler,B. Stratton,Dan Stutman,H. Takahashi,Yuichi Takase,Naoki Tamura,Xian-Zhu Tang,G. Taylor,Chase N. Taylor,Kevin Tritz,D. Tsarouhas,Maxim Umansky,Jakub Urban,E. Untergberg,M.L. Walker,William R. Wampler,W. X. Wang,Josh A. Whaley,Roscoe White,John B Wilgen,R. Wilson,K. L. Wong,John Wright,Z. Xia,Dennis L. Youchison,Guoqin Yu,Howard Yuh,Leonid E. Zakharov,D. Zemlyanov,G. Zimmer,Stewart Zweben +179 more
TL;DR: The National Spherical Torus Experiment (NSTX-U) as mentioned in this paper has been used to test physics theories for next-step tokamak operation, including ITER.
Journal ArticleDOI
Plasmoids Formation During Simulations of Coaxial Helicity Injection in the National Spherical Torus Experiment.
F. Ebrahimi,Roger Raman +1 more
TL;DR: Fundamental characteristics of the plasmoid instability, including fast reconnection rate, have been observed in these realistic simulations of transient coaxial helicity injection experiments in the National Spherical Torus Experiment.
Journal ArticleDOI
Overview of results from the National Spherical Torus Experiment (NSTX)
D.A. Gates,J. Ahn,Jean Paul Allain,R. Andre,Robert Bastasz,M. G. Bell,R. E. Bell,Elena Belova,John Berkery,Riccardo Betti,J.M. Bialek,T. M. Biewer,T.S. Bigelow,Manfred Bitter,J.A. Boedo,P.T. Bonoli,Allen H. Boozer,Dylan Brennan,J. Breslau,D. L. Brower,C.E. Bush,John Canik,G. Caravelli,Mark D. Carter,John Caughman,Choong-Seock Chang,Wonho Choe,Neal Crocker,D.S. Darrow,L. F. Delgado-Aparicio,S. J. Diem,D.A. D'Ippolito,Calvin Domier,William Dorland,P. C. Efthimion,Akira Ejiri,N. M. Ershov,Todd Evans,E. Feibush,M.E. Fenstermacher,J.R. Ferron,Michael Finkenthal,J. Foley,R. Frazin,E.D. Fredrickson,Guoyong Fu,Hisamichi Funaba,Stefan Gerhardt,Alan H. Glasser,N. N. Gorelenkov,L. R. Grisham,T.S. Hahm,R. W. Harvey,Ahmed Hassanein,William Heidbrink,K. W. Hill,J. C. Hillesheim,D. L. Hillis,Y. Hirooka,J.C. Hosea,B. Hu,D.A. Humphreys,Toshitaka Idehara,K. Indireshkumar,A. Ishida,F. Jaeger,Thomas Jarboe,Stephen Jardin,Michael Jaworski,Hantao Ji,Heesoo Jung,R. Kaita,J. Kallman,O. Katsuro-Hopkins,Kazuo Kawahata,Eiichirou Kawamori,Stanley Kaye,Charles Kessel,J. Kim,H. Kimura,Egemen Kolemen,Sergei Krasheninnikov,Predrag S Krstic,Seung-Hoe Ku,S. Kubota,H.W. Kugel,R.J. La Haye,L.L. Lao,B. LeBlanc,Woochang Lee,K. C. Lee,J.A. Leuer,Fred Levinton,Y. Liang,D. W. Liu,Neville C. Luhmann,Rajesh Maingi,Richard Majeski,J. Manickam,D. K. Mansfield,R.J. Maqueda,E. Mazzucato,D. C. McCune,B. McGeehan,George McKee,S. S. Medley,J.E. Menard,M.M. Menon,Harry M. Meyer,D. R. Mikkelsen,Gennady V. Miloshevsky,Osamu Mitarai,D. Mueller,S.H. Mueller,Tobin Munsat,J.R. Myra,Yoshio Nagayama,B. A. Nelson,X. V. Nguyen,Nobuhiro Nishino,Masaki Nishiura,Richard E. Nygren,M. Ono,T.H. Osborne,D. Pacella,Hyeon K. Park,Jong-Kyu Park,S. F. Paul,W. A. Peebles,B.G. Penaflor,M. Peng,C. K. Phillips,A. Pigarov,Mario Podesta,Josef Preinhaelter,Abhay K. Ram,Roger Raman,David A Rasmussen,Aaron J. Redd,H. Reimerdes,G. Rewoldt,P. Ross,Clarence Worth Rowley,E. Ruskov,D. A. Russell,David N. Ruzic,P.M. Ryan,S.A. Sabbagh,M.J. Schaffer,Eugenio Schuster,S. D. Scott,Ker-Chung Shaing,P. Sharpe,Vladimir Shevchenko,Kouji Shinohara,Valeryi Sizyuk,C.H. Skinner,Alexander Smirnov,David R. Smith,Sterling Smith,P. B. Snyder,W. M. Solomon,Aaron Sontag,Vlad Soukhanovskii,T. Stoltzfus-Dueck,D. P. Stotler,T. Strait,Brentley Stratton,Dan Stutman,Ryoji Takahashi,Yuichi Takase,Naoki Tamura,Xian-Zhu Tang,G. Taylor,Chase N. Taylor,Catalin M. Ticos,Kevin Tritz,D. Tsarouhas,A. Turrnbull,George Tynan,M.A. Ulrickson,Maxim Umansky,Jakub Urban,E. Utergberg,M.L. Walker,William R. Wampler,J. Wang,W. Wang,A.S. Welander,Josh A. Whaley,Roscoe White,John B Wilgen,R. Wilson,K. L. Wong,John Wright,Z. Xia,Xueqiao Xu,Dennis L. Youchison,Guoqin Yu,Howard Yuh,Leonid E. Zakharov,D. Zemlyanov,S. J. Zweben +202 more
TL;DR: The National Spherical Torus Experiment (NSTX) is the demonstration of the physics basis required to extrapolate to the next steps for the spherical torus (ST), such as a plasma facing component test facility (NHTX) or an ST-based component test facilities (ST-CTF), and to support ITER.
Journal ArticleDOI
Initial results from coaxial helicity injection experiments in NSTX
Roger Raman,Thomas Jarboe,D. Mueller,M.J. Schaffer,Ricardo Maqueda,Brian Nelson,S.A. Sabbagh,M.G. Bell,R. Ewig,E.D. Fredrickson,David Gates,J. Hosea,Hantao Ji,Robert Kaita,S.M. Kaye,H.W. Kugel,Rajesh Maingi,Jonathan Menard,M. Ono,D. J. Orvis,F. Paoletti,S.F. Paul,M. Peng,C.H. Skinner,John B Wilgen,Stewart Zweben +25 more
TL;DR: Coaxial helicity injection has been investigated on the National Spherical Torus Experiment (NSTX) as mentioned in this paper, and initial experiments produced 130 kA of toroidal current without the use of the central solenoid.