Results 11 to 20 of about 4,697,162 (157)

NSTX-U research advancing the physics of spherical tokamaks

Nuclear Fusion
The objectives of NSTX-U research are to reinforce the advantages of STs while addressing the challenges. To extend confinement physics of low- A , high beta plasmas to lower collisionality levels, understanding of the transport mechanisms that set ...
J.W. Berkery, P.O. Adebayo-Ige, H. Al Khawaldeh, G. Avdeeva, S-G. Baek, S. Banerjee, K. Barada, D.J. Battaglia, R.E. Bell, E. Belli, E.V. Belova, N. Bertelli, N. Bisai, P.T. Bonoli, M.D. Boyer, J. Butt, J. Candy, C.S. Chang, C.F. Clauser, L.D. Corona Rivera, M. Curie, P.C. de Vries, R. Diab, A. Diallo, J. Dominski, V.N. Duarte, E.D. Emdee, N.M. Ferraro, R. Fitzpatrick, E.L. Foley, E. Fredrickson, M.E. Galante, K.F. Gan, S. Gerhardt, R. Goldston, W. Guttenfelder, R. Hager, M.O. Hanson, S.C. Jardin, T.G. Jenkins, S.M. Kaye, A. Khodak, J. Kinsey, A. Kleiner, E. Kolemen, S. Ku, M. Lampert, B. Leard, B.P. LeBlanc, J.B. Lestz, F.M. Levinton, C. Liu, T. Looby, R. Lunsford, T. Macwan, R. Maingi, J. McClenaghan, J.E. Menard, S. Munaretto, M. Ono, A. Pajares, J. Parisi, J-K. Park, M.S. Parsons, B.S. Patel, Y.V. Petrov, M. Podestà, F. Poli, M. Porcelli, T. Rafiq, S.A. Sabbagh, Á. Sánchez Villar, E. Schuster, J. Schwartz, A. Sharma, S. Shiraiwa, P. Sinha, D. Smith, S. Smith, V.A. Soukhanovskii, G. Staebler, E. Startsev, B. Stratton, K.E. Thome, W. Tierens, M. Tobin, I.U. Uzun-Kaymak, B. Van Compernolle, J. Wai, W. Wang, W. Wehner, A. Welander, J. Yang, V. Zamkovska, X. Zhang, X.L. Zhu, S. Zweben   +96 more
doaj   +3 more sources

NSTX-U theory, modeling and analysis results

Nuclear Fusion, 2022
Abstract The mission of the low aspect ratio spherical tokamak NSTX-U is to advance the physics basis and technical solutions required for optimizing the configuration of next-step steady-state tokamak fusion devices. NSTX-U will ultimately operate at up to 2 MA of plasma current and 1 T toroidal field on axis for 5 s, and has available ...
W. Guttenfelder, D.J. Battaglia, E. Belova, N. Bertelli, M.D. Boyer, C.S. Chang, A. Diallo, V.N. Duarte, F. Ebrahimi, E.D. Emdee, N. Ferraro, E. Fredrickson, N.N. Gorelenkov, W. Heidbrink, Z. Ilhan, S.M. Kaye, E.-H. Kim, A. Kleiner, F. Laggner, M. Lampert, J.B. Lestz, C. Liu, D. Liu, T. Looby, N. Mandell, R. Maingi, J.R. Myra, S. Munaretto, M. Podestà, T. Rafiq, R. Raman, M. Reinke, Y. Ren, J. Ruiz Ruiz, F. Scotti, S. Shiraiwa, V. Soukhanovskii, P. Vail, Z.R. Wang, W. Wehner, A.E. White, R.B. White, B.J.Q. Woods, J. Yang, S.J. Zweben, S. Banerjee, R. Barchfeld, R.E. Bell, J.W. Berkery, A. Bhattacharjee, A. Bierwage, G.P. Canal, X. Chen, C. Clauser, N. Crocker, C. Domier, T. Evans, M. Francisquez, K. Gan, S. Gerhardt, R.J. Goldston, T. Gray, A. Hakim, G. Hammett, S. Jardin, R. Kaita, B. Koel, E. Kolemen, S.-H. Ku, S. Kubota, B.P. LeBlanc, F. Levinton, J.D. Lore, N. Luhmann, R. Lunsford, R. Maqueda, J.E. Menard, J.H. Nichols, M. Ono, J.-K. Park, F. Poli, T. Rhodes, J. Riquezes, D. Russell, S.A. Sabbagh, E. Schuster, D.R. Smith, D. Stotler, B. Stratton, K. Tritz, W. Wang, B. Wirth   +91 more
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NSTX/NSTX-U theory, modeling and analysis results

Nuclear Fusion, 2019
The mission of the spherical tokamak NSTX-U is to explore the physics that drives core and pedestal transport and stability at high-β and low collisionality, as part of the development of the spherical tokamak (ST) concept towards a compact, low-cost ST ...
S.M. Kaye, D.J. Battaglia, D. Baver, E. Belova, J.W. Berkery, V.N. Duarte, N. Ferraro, E. Fredrickson, N. Gorelenkov, W. Guttenfelder, G.Z. Hao, W. Heidbrink, O. Izacard, D. Kim, I. Krebs, R. La Haye, J. Lestz, D. Liu, L.A. Morton, J. Myra, D. Pfefferle, M. Podesta, Y. Ren, J. Riquezes, S.A. Sabbagh, M. Schneller, F. Scotti, V. Soukhanovskii, S.J. Zweben, J.W. Ahn, J.P. Allain, R. Barchfeld, F. Bedoya, R.E. Bell, N. Bertelli, A. Bhattacharjee, M.D. Boyer, D. Brennan, G. Canal, J. Canik, N. Crocker, D. Darrow, L. Delgado-Aparicio, A. Diallo, C. Domier, F. Ebrahimi, T. Evans, R. Fonck, H. Frerichs, K. Gan, S. Gerhardt, T. Gray, T. Jarboe, S. Jardin, M.A. Jaworski, R. Kaita, B. Koel, E. Kolemen, D.M. Kriete, S. Kubota, B.P. LeBlanc, F. Levinton, N. Luhmann, R. Lunsford, R. Maingi, R. Maqueda, J.E. Menard, D. Mueller, C.E. Myers, M. Ono, J.-K. Park, R. Perkins, F. Poli, R. Raman, M. Reinke, T. Rhodes, C. Rowley, D. Russell, E. Schuster, O. Schmitz, Y. Sechrest, C.H. Skinner, D.R. Smith, T. Stotzfus-Dueck, B. Stratton, G. Taylor, K. Tritz, W. Wang, Z. Wang, I. Waters, B. Wirth   +90 more
openaire   +3 more sources

Nonlinear gyrokinetic simulations of microtearing modes in NSTX and NSTX-U-like plasmas

Nuclear Fusion
A systematic nonlinear gyrokinetic analysis of microtearing modes (MTMs) in National Spherical Tokamak eXperiment (NSTX) discharges spanning high-, moderate-, and low-collisionality regimes around mid-radius is presented using the fully electromagnetic ...
Tajinder Singh, Tariq Rafiq, Eugenio Schuster, Cesar Clauser, Stanley Kaye, Benoit LeBlanc   +5 more
doaj   +2 more sources

Reversed magnetic shear scenario development in NSTX-U using TRANSP

Nuclear Fusion
Understanding and control of electron thermal transport is a critical point of research in magnetic fusion experiments. Previous experiments have shown that operation with reversed magnetic shear (RMS) can suppress electron thermal transport, resulting ...
M.E. Galante, M.D. Boyer, I.U. Uzun-Kaymak, E.L. Foley, B.P. LeBlanc, F.M. Levinton   +5 more
doaj   +2 more sources

Three new extreme ultraviolet spectrometers on NSTX-U for impurity monitoring

Review of Scientific Instruments, 2016
Three extreme ultraviolet (EUV) spectrometers have been mounted on the National Spherical Torus Experiment–Upgrade (NSTX-U). All three are flat-field grazing-incidence spectrometers and are dubbed X-ray and Extreme Ultraviolet Spectrometer (XEUS, 8–70 Å), Long-Wavelength Extreme Ultraviolet Spectrometer (LoWEUS, 190–440 Å), and Metal Monitor and ...
M. E. Weller, P. Beiersdorfer, V. A. Soukhanovskii, E. W. Magee, F. Scotti   +4 more
openaire   +4 more sources

Spherical tokamak physics research in preparation for the operation of NSTX-U

Nuclear Fusion
The National Spherical Torus Experiment Upgrade (NSTX-U) is preparing to resume operation, representing a crucial step toward realizing compact, cost-effective fusion pilot plants.
S. Munaretto, P.O. Adebayo-Ige, H. Anand, G. Avdeeva, S.G. Baek, K. Barada, E. Belli, E.V. Belova, J.W. Berkery, T.N. Bernard, N. Bertelli, P. Bonofiglo, P.T. Bonoli, M.D. Boyer, J. Candy, C.S. Chang, H. Chung, C. Clauser, M. Comanescu, D. Corona, N.A. Crocker, R. De Levante Rodriguez, E.W. DeShazer, A. Diallo, J. Dominski, V.N. Duarte, F. Ebrahimi, E.D. Emdee, S. Ethier, N.M. Ferraro, E.L. Foley, E.D. Fredrickson, M.E. Galante, K.F. Gan, S. Gerhardt, R.J. Goldston, M. Gorelenkova, W. Guttenfelder, R. Hager, F.D. Halpern, J. Halpern, D. Hatch, F. Hoffmann, M.S. Islam, S.C. Jardin, S.M. Kaye, A. Khodak, J.E. Kinsey, A. Kleiner, E. Kolemen, S. Ku, M. Lampert, B. Leard, B.P. LeBlanc, J.B. Lestz, F.M. Levinton, P.-Y. Li, N.C. Logan, N.A. Lopez, R. Lunsford, T. Macwan, R. Maingi, J. McClenaghan, A.G. McLean, J.E. Menard, Y.-S. Na, A.O. Nelson, M. Ono, A. Pajares, A. Pankin, J. Parisi, F.I. Parra, M.S. Parsons, B.S. Patel, M. Podestá, F.M. Poli, M. Porcelli, T. Rafiq, R. Raman, J.D. Riquezes, S.A. Sabbagh, A. Sanchez-Villar, E. Schuster, S. Shiraiwa, T. Singh, S.P. Smith, D. Smith, V.A. Soukhanovskii, G.M. Staebler, B. Stratton, K.E. Thome, M. Tobin, I.U. Uzun-Kaymak, B. Van Compernolle, W.X. Wang, W. Wehner, A.S. Welander, B.D. Wirth, J. Yang, V. Zamkovska, X. Zhang   +100 more
doaj   +2 more sources

The role of rectified currents in far-field RF sheaths and in SOL losses of HHFW power on NSTX

Nuclear Materials and Energy, 2017
Radio-frequency (RF) rectification is an important sheath phenomenon for wave heating of plasma in fusion devices and is proposed to be the mechanism responsible for converting high-harmonic fast-wave (HHFW) power in the National Spherical Torus ...
R.J. Perkins, J.C. Hosea, M.A. Jaworski, R.E. Bell, N. Bertelli, G.J. Kramer, L. Roquemore, G. Taylor, J.R. Wilson   +8 more
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Design and simulation of the snowflake divertor control for NSTX–U

Plasma Physics and Controlled Fusion, 2019
Abstract This paper presents the development of a physics-based multiple-input-multiple-output algorithm for real-time feedback control of snowflake divertor (SFD) configurations on the National Spherical Torus eXperiment Upgrade (NSTX–U).
P J Vail, M D Boyer, A S Welander, E Kolemen   +3 more
core   +4 more sources

Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U

Review of Scientific Instruments, 2016
The Far-infrared Tangential Interferometer/Polarimeter (FIReTIP) system has been refurbished and is being reinstalled on the National Spherical Torus Experiment—Upgrade (NSTX-U) to supply real-time line-integrated core electron density measurements for use in the NSTX-U plasma control system (PCS) to facilitate real-time density feedback control of the
E. R. Scott, R. Barchfeld, P. Riemenschneider, C. W. Domier, C. M. Muscatello, M. Sohrabi, R. Kaita, Y. Ren, N. C. Luhmann   +8 more
openaire   +4 more sources