Results 11 to 20 of about 3,538 (193)

NSTX Electrical Power Systems [PDF]

18th IEEE/NPSS Symposium on Fusion Engineering. Symposium Proceedings (Cat. No.99CH37050), 1999
The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physic Laboratory (PPPL). 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 ...
Ilic, A., Baker, E., Hatcher, R., Ramakrishnan, S., al, et   +4 more
openaire   +3 more sources

Results of NSTX Heating Experiments [PDF]

IEEE Transactions on Plasma Science, 2002
The National Spherical Torus Experiment (NSTX) at Princeton is designed to assess the potential of the low-aspect-ratio spherical torus concept for magnetic plasma confinement. The plasma has been heated by up to 5 MW of neutral beam injection, NBI, at an injection energy of 90 keV and up to 6 MW of high harmonic fast wave, HHFW, at 30 MHz.
null D. Mueller, null M. Ono, null M.G. Bell, null R.E. Bell, null M. Bitter, null C. Bourdelle, null D.S. Darrow, null P.C. Efthimion, null E.D. Fredrickson, null D.A Gates, null R.J. Goldston, null L.R. Grisham, null R.J. Hawryluk, null K.W. Hill, null J.C. Hosea, null S.C. Jardin, null H. Ji, null S.M. Kaye, null R. Kaita, null H.W. Kugel, null D.W. Johnson, null B.P. LeBlanc, null R. Majeski, null E. Mazzucato, null S.S. Medley, null J.E. Menard, null H.K. Park, null S.F. Paul, null C.K. Phillips, null M.H. Redi, null A.L. Rosenberg, null C.H. Skinner, null V.A. Soukhanovskii, null B. Stratton, null E.J Synakowski, null G. Taylor, null J.R. Wilson, null S.J. Zweben, null Y-K.M. Peng, null R. Barry, null T. Bigelow, null C.E. Bush, null M. Carter, null R. Maingi, null M. Menon, null P.M. Ryan, null D.W. Swain, null J. Wilgen, null 37 additional authors   +48 more
  +5 more sources

NSTX Overview [PDF]

, 2001
The National Spherical Torus Experiment (NSTX) has had a very productive period of plasma operations since the last ST Workshop in Seattle, WA, in November 1999. A number of new research tools have become available and the plasma parameters have improved significantly. These advances are describe in this paper.
Ono, M., Bell, M., Bell, R.E., Bitter, M., Bourdelle, C., Darrow, D., Gates, D., Hosea, J., Kaye, S.M., Kaita, R., Kugel, H., Johnson, D., LeBlanc, B., Medley, S., al., et   +14 more
openaire   +2 more sources

The NSTX Trouble Reporting System [PDF]

Proceedings of the 19th IEEE/IPSS Symposium on Fusion Engineering. 19th SOFE (Cat. No.02CH37231), 2002
An online Trouble Reporting System (TRS) has been introduced at the National Spherical Torus Experiment (NSTX). The TRS is used by NSTX operators to report problems that affect NSTX operations. The purpose of the TRS is to enhance NSTX reliability and maintainability by identifying components, occurrences, and trends that contribute to machine downtime.
Sengupta, S., Oliaro, G.
openaire   +3 more sources

An Enhanced Nonlinear Critical Gradient for Electron Turbulent Transport due to Reversed Magnetic Shear [PDF]

, 1999
The first nonlinear gyrokinetic simulations of electron internal transport barriers (e-ITBs) in the National Spherical Torus Experiment show that reversed magnetic shear can suppress thermal transport by increasing the nonlinear critical gradient for ...
Peterson, J. L., Hammett, G. W., Mikkelsen, D. R., Yuh, H. Y., Candy, J., Guttenfelder, W., Kaye, S. M., LeBlanc, B.   +7 more
core   +3 more sources

A collective scattering system for measuring electron gyroscale fluctuations on the National Spherical Torus Experiment [PDF]

, 2019
A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k(perpendicular to)rho(e)less than or similar to 0.6 and
Domier, CW, Lee, W, Luhmann, NC, Mazzucato, E, Park, HK, Smith, DR   +5 more
core   +1 more source

The NSTX fast-ion D-alpha diagnostic [PDF]

Review of Scientific Instruments, 2008
A new diagnostic, aimed at energy-resolved measurements of the spatial and temporal dynamics of fast ions in NSTX plasmas, is described. It is based on active charge-exchange recombination spectroscopy. The fast-ion signal is inferred from light emitted in the wavelength range of the Dα line by fast ions recombining with an injected neutral beam.
Podestà, M, Heidbrink, WW, Bell, RE, Feder, R   +3 more
openaire   +4 more sources

“Snowflake” divertor configuration in NSTX [PDF]

Journal of Nuclear Materials, 2011
Abstract Steady-state handling of divertor heat flux is a critical issue for present and future conventional and spherical tokamaks with compact high power density divertors. A novel “snowflake” divertor (SFD) configuration that takes advantage of magnetic properties of a second-order poloidal null has been predicted to have a larger plasma-wetted ...
Soukhanovskii, V. A., Ahn, J. W., Bell, R. E., Gates, D. A., Gerhardt, S., Kaita, R., Kolemen, E., Kugel, H. W., LeBlanc, B. P., Maingi, R., Maqueda, R., McLean, A., Menard, J. E., Mueller, D. M., Paul, S. F., Raman, R., Roquemore, A. L., Ryutov, D. D., Scott, H. A.   +18 more
openaire   +1 more source

Electron gyroscale fluctuation measurements in National Spherical Torus Experiment H-mode plasmas [PDF]

, 2019
A collective scattering system has measured electron gyroscale fluctuations in National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion 40, 557 (2000)] H-mode plasmas to investigate electron temperature gradient (ETG) turbulence. Observations and
Bell, RE, Domier, CW, Kaye, SM, LeBlanc, BP, Lee, W, Levinton, FM, Luhmann, NC, Mazzucato, E, Menard, JE, Park, HK, Smith, DR, Yuh, H   +11 more
core   +1 more source

Global modeling of wall material migration following boronization in NSTX-U

Nuclear Materials and Energy, 2019
Boronization is commonly utilized in tokamaks to suppress intrinsic impurities, most notably oxygen from residual water vapor. However, this is a temporary solution, as oxygen levels typically return to pre-boronization levels following repeated plasma ...
J.H. Nichols, M.A. Jaworski, C.H. Skinner, F. Bedoya, F. Scotti, V.A. Soukhanovskii, K. Schmid   +6 more
doaj   +1 more source