skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: An overview of recent physics results from NSTX

Abstract

Currently, the National Spherical Torus Experiment (NSTX) is being upgraded to operate at twice the toroidal field and plasma current (up to 1 T and 2 MA), with a second, more tangentially aimed neutral beam (NB) for current and rotation control, allowing for pulse lengths up to 5 s. Recent NSTX physics analyses have addressed topics that will allow NSTX-Upgrade to achieve the research goals critical to a Fusion Nuclear Science Facility. These include producing stable, 100% non-inductive operation in high-performance plasmas, assessing plasma-material interface (PMI) solutions to handle the high heat loads expected in the next-step devices and exploring the unique spherical torus (ST) parameter regimes to advance predictive capability. Non-inductive operation and current profile control in NSTX-U will be facilitated by co-axial helicity injection (CHI) as well as radio frequency (RF) and NB heating. CHI studies using NIMROD indicate that the reconnection process is consistent with the 2D Sweet-Parker theory. Full-wave AORSA simulations show that RF power losses in the scrape-off layer (SOL) increase significantly for both NSTX and NSTX-U when the launched waves propagate in the SOL. Moreover, Toroidal Alfven eigenmode avalanches and higher frequency Alfven eigenmodes can affect NB-driven current through energy loss and redistribution ofmore » fast ions. The inclusion of rotation and kinetic resonances, which depend on collisionality, is necessary for predicting experimental stability thresholds of fast growing ideal wall and resistive wall modes. Neutral beams and neoclassical toroidal viscosity generated from applied 3D fields can be used as actuators to produce rotation profiles optimized for global stability. DEGAS-2 has been used to study the dependence of gas penetration on SOL temperatures and densities for the MGI system being implemented on the Upgrade for disruption mitigation. PMI studies have focused on the effect of ELMs and 3D fields on plasma detachment and heat flux handling. Simulations indicate that snowflake and impurity seeded radiative divertors are candidates for heat flux mitigation in NSTX-U. Studies of lithium evaporation on graphite surfaces indicate that lithium increases oxygen surface concentrations on graphite, and deuterium-oxygen affinity, which increases deuterium pumping and reduces recycling. In situ and test-stand experiments of lithiated graphite and molybdenum indicate temperature-enhanced sputtering, although that test-stand studies also show the potential for heat flux reduction through lithium vapour shielding. Non-linear gyro kinetic simulations have indicated that ion transport can be enhanced by a shear-flow instability, and that non-local effects are necessary to explain the observed rapid changes in plasma turbulence. Predictive simulations have shown agreement between a microtearing-based reduced transport model and the measured electron temperatures in a microtearing unstable regime. Finally, two Alfven eigenmode-driven fast ion transport models have been developed and successfully benchmarked against NSTX data. Upgrade construction is moving on schedule with initial physics research operation of NSTX-U planned for mid-2015.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [3];  [4];  [1];  [1];  [3];  [1];  [1];  [5];  [2];  [1];  [6];  [5];  [7];  [8];  [9] more »;  [5];  [10];  [1]; ORCiD logo [1];  [11]; ORCiD logo [1];  [12];  [13]; ORCiD logo [1];  [2];  [1];  [14];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [15];  [4];  [11];  [1];  [13];  [13];  [13];  [16];  [17];  [1];  [1]; ORCiD logo [1];  [1];  [18];  [1];  [1];  [11];  [2];  [2];  [1];  [19];  [12];  [20];  [21];  [6];  [1];  [13];  [22];  [18];  [1];  [1];  [1];  [1];  [1];  [11];  [1];  [1];  [1];  [14];  [13];  [13];  [1];  [23];  [20];  [11];  [3];  [14];  [1];  [1];  [1];  [23];  [17];  [1];  [6];  [1];  [1];  [24];  [4];  [15];  [18];  [1];  [1];  [13];  [1];  [14];  [1];  [1];  [1];  [1];  [18];  [1];  [11];  [11];  [15];  [3];  [2];  [5];  [25];  [6];  [24];  [17];  [12];  [3];  [1];  [17];  [13];  [1];  [17];  [6];  [1];  [1];  [1];  [16];  [12];  [1];  [16];  [13];  [1];  [1];  [1];  [1];  [10];  [9];  [1];  [23];  [1];  [1] « less
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Illinois, Urbana-Champaign, IL (United States)
  4. Univ. of California, Davis, CA (United States)
  5. Columbia Univ., New York, NY (United States)
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. IPP, Garching (Germany)
  8. Univ. of California, San Diego, CA (United States)
  9. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  10. Univ. of Tennessee, Knoxville, TN (United States)
  11. Princeton Univ., NJ (United States)
  12. Purdue Univ., West Lafayette, IN (United States)
  13. General Atomics, San Diego, CA (United States)
  14. Univ. of California, Los Angeles, CA (United States)
  15. Lodestar Research Corp., Boulder, CO (United States)
  16. Johns Hopkins Univ., Baltimore, MD (United States)
  17. Univ. of Wisconsin, Madison, WI (United States)
  18. Univ. of Washington, Seattle, WA (United States)
  19. CompX, Del Mar, CA (United States)
  20. Univ. of California, Irvine, CA (United States)
  21. National Inst. for Fusion Science, Toki (Japan)
  22. XCEL, Oak Ridge, TN (United States)
  23. Nova Photonics, Princeton, NJ (United States)
  24. Univ. of Colorado, Boulder, CO (United States)
  25. Lehigh Univ., Bethlehem, PA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1256734
Report Number(s):
PPPL-5092
Journal ID: ISSN 0029-5515
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 55; Journal Issue: 10; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX; spherical torus; overview; toroidal plasmas; transport; simulation; code; disruptions; turbulence; tokamaks; geometry; models

Citation Formats

Kaye, S. M., Abrams, T., Ahn, J. -W., Allain, J. P., Andre, R., Andruczyk, D., Barchfeld, R., Battaglia, D., Bhattacharjee, A., Bedoya, F., Bell, R. E., Belova, E., Berkery, J., Berry, L., Bertelli, N., Beiersdorfer, P., Bialek, J., Bilato, R., Boedo, J., Bonoli, P., Boozer, A., Bortolon, A., Boyer, M. D., Boyle, D., Brennan, D., Breslau, J., Brooks, J., Buttery, R., Capece, A., Canik, J., Chang, C. S., Crocker, N., Darrow, D., Davis, W., Delgado-Aparicio, L., Diallo, A., D'Ippolito, D., Domier, C., Ebrahimi, F., Ethier, S., Evans, T., Ferraro, N., Ferron, J., Finkenthal, M., Fonck, R., Fredrickson, E., Fu, G. Y., Gates, D., Gerhardt, S., Glasser, A., Gorelenkov, N., Gorelenkova, M., Goumiri, I., Gray, T., Green, D., Guttenfelder, W., Harvey, R., Hassanein, A., Heidbrink, W., Hirooka, Y., Hooper, E. B., Hosea, J., Humphreys, D., Jaeger, E. F., Jarboe, T., Jardin, S., Jaworski, M. A., Kaita, R., Kessel, C., Kim, K., Koel, B., Kolemen, E., Kramer, G., Ku, S., Kubota, S., LaHaye, R. J., Lao, L., LeBlanc, B. P., Levinton, F., Liu, D., Lore, J., Lucia, M., Jr, N. Luhmann, Maingi, R., Majeski, R., Mansfield, D., Maqueda, R., McKee, G., Medley, S., Meier, E., Menard, J., Mueller, D., Munsat, T., Muscatello, C., Myra, J., Nelson, B., Nichols, J., Ono, M., Osborne, T., Park, J. -K., Peebles, W., Perkins, R., Phillips, C., Podesta, M., Poli, F., Raman, R., Ren, Y., Roszell, J., Rowley, C., Russell, D., Ruzic, D., Ryan, P., Sabbagh, S. A., Schuster, E., Scotti, F., Sechrest, Y., Shaing, K., Sizyuk, T., Sizyuk, V., Skinner, C., Smith, D., Snyder, P., Solomon, W., Sovenic, C., Soukhanovskii, V., Startsev, E., Stotler, D., Stratton, B., Stutman, D., Taylor, C., Taylor, G., Tritz, K., Walker, M., Wang, W., Wang, Z., White, R., Wilson, J. R., Wirth, B., Wright, J., Yuan, X., Yuh, H., Zakharov, L., and Zweben, S. J. An overview of recent physics results from NSTX. United States: N. p., 2015. Web. doi:10.1088/0029-5515/55/10/104002.
Kaye, S. M., Abrams, T., Ahn, J. -W., Allain, J. P., Andre, R., Andruczyk, D., Barchfeld, R., Battaglia, D., Bhattacharjee, A., Bedoya, F., Bell, R. E., Belova, E., Berkery, J., Berry, L., Bertelli, N., Beiersdorfer, P., Bialek, J., Bilato, R., Boedo, J., Bonoli, P., Boozer, A., Bortolon, A., Boyer, M. D., Boyle, D., Brennan, D., Breslau, J., Brooks, J., Buttery, R., Capece, A., Canik, J., Chang, C. S., Crocker, N., Darrow, D., Davis, W., Delgado-Aparicio, L., Diallo, A., D'Ippolito, D., Domier, C., Ebrahimi, F., Ethier, S., Evans, T., Ferraro, N., Ferron, J., Finkenthal, M., Fonck, R., Fredrickson, E., Fu, G. Y., Gates, D., Gerhardt, S., Glasser, A., Gorelenkov, N., Gorelenkova, M., Goumiri, I., Gray, T., Green, D., Guttenfelder, W., Harvey, R., Hassanein, A., Heidbrink, W., Hirooka, Y., Hooper, E. B., Hosea, J., Humphreys, D., Jaeger, E. F., Jarboe, T., Jardin, S., Jaworski, M. A., Kaita, R., Kessel, C., Kim, K., Koel, B., Kolemen, E., Kramer, G., Ku, S., Kubota, S., LaHaye, R. J., Lao, L., LeBlanc, B. P., Levinton, F., Liu, D., Lore, J., Lucia, M., Jr, N. Luhmann, Maingi, R., Majeski, R., Mansfield, D., Maqueda, R., McKee, G., Medley, S., Meier, E., Menard, J., Mueller, D., Munsat, T., Muscatello, C., Myra, J., Nelson, B., Nichols, J., Ono, M., Osborne, T., Park, J. -K., Peebles, W., Perkins, R., Phillips, C., Podesta, M., Poli, F., Raman, R., Ren, Y., Roszell, J., Rowley, C., Russell, D., Ruzic, D., Ryan, P., Sabbagh, S. A., Schuster, E., Scotti, F., Sechrest, Y., Shaing, K., Sizyuk, T., Sizyuk, V., Skinner, C., Smith, D., Snyder, P., Solomon, W., Sovenic, C., Soukhanovskii, V., Startsev, E., Stotler, D., Stratton, B., Stutman, D., Taylor, C., Taylor, G., Tritz, K., Walker, M., Wang, W., Wang, Z., White, R., Wilson, J. R., Wirth, B., Wright, J., Yuan, X., Yuh, H., Zakharov, L., & Zweben, S. J. An overview of recent physics results from NSTX. United States. doi:10.1088/0029-5515/55/10/104002.
Kaye, S. M., Abrams, T., Ahn, J. -W., Allain, J. P., Andre, R., Andruczyk, D., Barchfeld, R., Battaglia, D., Bhattacharjee, A., Bedoya, F., Bell, R. E., Belova, E., Berkery, J., Berry, L., Bertelli, N., Beiersdorfer, P., Bialek, J., Bilato, R., Boedo, J., Bonoli, P., Boozer, A., Bortolon, A., Boyer, M. D., Boyle, D., Brennan, D., Breslau, J., Brooks, J., Buttery, R., Capece, A., Canik, J., Chang, C. S., Crocker, N., Darrow, D., Davis, W., Delgado-Aparicio, L., Diallo, A., D'Ippolito, D., Domier, C., Ebrahimi, F., Ethier, S., Evans, T., Ferraro, N., Ferron, J., Finkenthal, M., Fonck, R., Fredrickson, E., Fu, G. Y., Gates, D., Gerhardt, S., Glasser, A., Gorelenkov, N., Gorelenkova, M., Goumiri, I., Gray, T., Green, D., Guttenfelder, W., Harvey, R., Hassanein, A., Heidbrink, W., Hirooka, Y., Hooper, E. B., Hosea, J., Humphreys, D., Jaeger, E. F., Jarboe, T., Jardin, S., Jaworski, M. A., Kaita, R., Kessel, C., Kim, K., Koel, B., Kolemen, E., Kramer, G., Ku, S., Kubota, S., LaHaye, R. J., Lao, L., LeBlanc, B. P., Levinton, F., Liu, D., Lore, J., Lucia, M., Jr, N. Luhmann, Maingi, R., Majeski, R., Mansfield, D., Maqueda, R., McKee, G., Medley, S., Meier, E., Menard, J., Mueller, D., Munsat, T., Muscatello, C., Myra, J., Nelson, B., Nichols, J., Ono, M., Osborne, T., Park, J. -K., Peebles, W., Perkins, R., Phillips, C., Podesta, M., Poli, F., Raman, R., Ren, Y., Roszell, J., Rowley, C., Russell, D., Ruzic, D., Ryan, P., Sabbagh, S. A., Schuster, E., Scotti, F., Sechrest, Y., Shaing, K., Sizyuk, T., Sizyuk, V., Skinner, C., Smith, D., Snyder, P., Solomon, W., Sovenic, C., Soukhanovskii, V., Startsev, E., Stotler, D., Stratton, B., Stutman, D., Taylor, C., Taylor, G., Tritz, K., Walker, M., Wang, W., Wang, Z., White, R., Wilson, J. R., Wirth, B., Wright, J., Yuan, X., Yuh, H., Zakharov, L., and Zweben, S. J. Fri . "An overview of recent physics results from NSTX". United States. doi:10.1088/0029-5515/55/10/104002. https://www.osti.gov/servlets/purl/1256734.
@article{osti_1256734,
title = {An overview of recent physics results from NSTX},
author = {Kaye, S. M. and Abrams, T. and Ahn, J. -W. and Allain, J. P. and Andre, R. and Andruczyk, D. and Barchfeld, R. and Battaglia, D. and Bhattacharjee, A. and Bedoya, F. and Bell, R. E. and Belova, E. and Berkery, J. and Berry, L. and Bertelli, N. and Beiersdorfer, P. and Bialek, J. and Bilato, R. and Boedo, J. and Bonoli, P. and Boozer, A. and Bortolon, A. and Boyer, M. D. and Boyle, D. and Brennan, D. and Breslau, J. and Brooks, J. and Buttery, R. and Capece, A. and Canik, J. and Chang, C. S. and Crocker, N. and Darrow, D. and Davis, W. and Delgado-Aparicio, L. and Diallo, A. and D'Ippolito, D. and Domier, C. and Ebrahimi, F. and Ethier, S. and Evans, T. and Ferraro, N. and Ferron, J. and Finkenthal, M. and Fonck, R. and Fredrickson, E. and Fu, G. Y. and Gates, D. and Gerhardt, S. and Glasser, A. and Gorelenkov, N. and Gorelenkova, M. and Goumiri, I. and Gray, T. and Green, D. and Guttenfelder, W. and Harvey, R. and Hassanein, A. and Heidbrink, W. and Hirooka, Y. and Hooper, E. B. and Hosea, J. and Humphreys, D. and Jaeger, E. F. and Jarboe, T. and Jardin, S. and Jaworski, M. A. and Kaita, R. and Kessel, C. and Kim, K. and Koel, B. and Kolemen, E. and Kramer, G. and Ku, S. and Kubota, S. and LaHaye, R. J. and Lao, L. and LeBlanc, B. P. and Levinton, F. and Liu, D. and Lore, J. and Lucia, M. and Jr, N. Luhmann and Maingi, R. and Majeski, R. and Mansfield, D. and Maqueda, R. and McKee, G. and Medley, S. and Meier, E. and Menard, J. and Mueller, D. and Munsat, T. and Muscatello, C. and Myra, J. and Nelson, B. and Nichols, J. and Ono, M. and Osborne, T. and Park, J. -K. and Peebles, W. and Perkins, R. and Phillips, C. and Podesta, M. and Poli, F. and Raman, R. and Ren, Y. and Roszell, J. and Rowley, C. and Russell, D. and Ruzic, D. and Ryan, P. and Sabbagh, S. A. and Schuster, E. and Scotti, F. and Sechrest, Y. and Shaing, K. and Sizyuk, T. and Sizyuk, V. and Skinner, C. and Smith, D. and Snyder, P. and Solomon, W. and Sovenic, C. and Soukhanovskii, V. and Startsev, E. and Stotler, D. and Stratton, B. and Stutman, D. and Taylor, C. and Taylor, G. and Tritz, K. and Walker, M. and Wang, W. and Wang, Z. and White, R. and Wilson, J. R. and Wirth, B. and Wright, J. and Yuan, X. and Yuh, H. and Zakharov, L. and Zweben, S. J.},
abstractNote = {Currently, the National Spherical Torus Experiment (NSTX) is being upgraded to operate at twice the toroidal field and plasma current (up to 1 T and 2 MA), with a second, more tangentially aimed neutral beam (NB) for current and rotation control, allowing for pulse lengths up to 5 s. Recent NSTX physics analyses have addressed topics that will allow NSTX-Upgrade to achieve the research goals critical to a Fusion Nuclear Science Facility. These include producing stable, 100% non-inductive operation in high-performance plasmas, assessing plasma-material interface (PMI) solutions to handle the high heat loads expected in the next-step devices and exploring the unique spherical torus (ST) parameter regimes to advance predictive capability. Non-inductive operation and current profile control in NSTX-U will be facilitated by co-axial helicity injection (CHI) as well as radio frequency (RF) and NB heating. CHI studies using NIMROD indicate that the reconnection process is consistent with the 2D Sweet-Parker theory. Full-wave AORSA simulations show that RF power losses in the scrape-off layer (SOL) increase significantly for both NSTX and NSTX-U when the launched waves propagate in the SOL. Moreover, Toroidal Alfven eigenmode avalanches and higher frequency Alfven eigenmodes can affect NB-driven current through energy loss and redistribution of fast ions. The inclusion of rotation and kinetic resonances, which depend on collisionality, is necessary for predicting experimental stability thresholds of fast growing ideal wall and resistive wall modes. Neutral beams and neoclassical toroidal viscosity generated from applied 3D fields can be used as actuators to produce rotation profiles optimized for global stability. DEGAS-2 has been used to study the dependence of gas penetration on SOL temperatures and densities for the MGI system being implemented on the Upgrade for disruption mitigation. PMI studies have focused on the effect of ELMs and 3D fields on plasma detachment and heat flux handling. Simulations indicate that snowflake and impurity seeded radiative divertors are candidates for heat flux mitigation in NSTX-U. Studies of lithium evaporation on graphite surfaces indicate that lithium increases oxygen surface concentrations on graphite, and deuterium-oxygen affinity, which increases deuterium pumping and reduces recycling. In situ and test-stand experiments of lithiated graphite and molybdenum indicate temperature-enhanced sputtering, although that test-stand studies also show the potential for heat flux reduction through lithium vapour shielding. Non-linear gyro kinetic simulations have indicated that ion transport can be enhanced by a shear-flow instability, and that non-local effects are necessary to explain the observed rapid changes in plasma turbulence. Predictive simulations have shown agreement between a microtearing-based reduced transport model and the measured electron temperatures in a microtearing unstable regime. Finally, two Alfven eigenmode-driven fast ion transport models have been developed and successfully benchmarked against NSTX data. Upgrade construction is moving on schedule with initial physics research operation of NSTX-U planned for mid-2015.},
doi = {10.1088/0029-5515/55/10/104002},
journal = {Nuclear Fusion},
issn = {0029-5515},
number = 10,
volume = 55,
place = {United States},
year = {2015},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Overview of the physics and engineering design of NSTX upgrade
journal, July 2012


Results of an International Study on a High-Volume Plasma-Based Neutron Source for Fusion Blanket Development
journal, January 1996

  • Abdou, Mohamed A.; Berk, Sam E.; Ying, Alice
  • Fusion Technology, Vol. 29, Issue 1
  • DOI: 10.13182/FST96-3

Prospects for pilot plants based on the tokamak, spherical tokamak and stellarator
journal, August 2011


Overview of physics results from the conclusive operation of the National Spherical Torus Experiment
journal, September 2013


Measured improvement of global magnetohydrodynamic mode stability at high-beta, and in reduced collisionality spherical torus plasmas
journal, May 2014

  • Berkery, J. W.; Sabbagh, S. A.; Balbaky, A.
  • Physics of Plasmas, Vol. 21, Issue 5
  • DOI: 10.1063/1.4876610

MAST Accomplishments and Upgrade for Fusion Next-Steps
journal, March 2014

  • Morris, William; Milnes, Joe; Barrett, Tom
  • IEEE Transactions on Plasma Science, Vol. 42, Issue 3
  • DOI: 10.1109/TPS.2014.2299973

Experimental demonstration of tokamak inductive flux saving by transient coaxial helicity injection on national spherical torus experiment
journal, September 2011

  • Raman, R.; Mueller, D.; Jarboe, T. R.
  • Physics of Plasmas, Vol. 18, Issue 9
  • DOI: 10.1063/1.3628540

Point-Source Helicity Injection Current Drive System for the Pegasus Toroidal Experiment
journal, November 2008


Dynamic modeling of transport and positional control of tokamaks
journal, October 1986


Non-inductive plasma start-up on NSTX and projections to NSTX-U using transient CHI
journal, June 2013


Nonlinear magnetohydrodynamics simulation using high-order finite elements
journal, March 2004

  • Sovinec, C. R.; Glasser, A. H.; Gianakon, T. A.
  • Journal of Computational Physics, Vol. 195, Issue 1
  • DOI: 10.1016/j.jcp.2003.10.004

Resistive magnetohydrodynamic simulations of helicity-injected startup plasmas in National Spherical Torus eXperiment
journal, September 2013

  • Hooper, E. B.; Sovinec, C. R.; Raman, R.
  • Physics of Plasmas, Vol. 20, Issue 9
  • DOI: 10.1063/1.4821977

Magnetic reconnection process in transient coaxial helicity injection
journal, September 2013

  • Ebrahimi, F.; Hooper, E. B.; Sovinec, C. R.
  • Physics of Plasmas, Vol. 20, Issue 9
  • DOI: 10.1063/1.4821974

Advances in high-harmonic fast wave physics in the National Spherical Torus Experiment
journal, May 2010

  • Taylor, G.; Bell, R. E.; Hosea, J. C.
  • Physics of Plasmas, Vol. 17, Issue 5
  • DOI: 10.1063/1.3371956

All-orders spectral calculation of radio-frequency heating in two-dimensional toroidal plasmas
journal, May 2001

  • Jaeger, E. F.; Berry, L. A.; D’Azevedo, E.
  • Physics of Plasmas, Vol. 8, Issue 5
  • DOI: 10.1063/1.1359516

Full wave simulations of fast wave heating losses in the scrape-off layer of NSTX and NSTX-U
journal, May 2014


High density Langmuir probe array for NSTX scrape-off layer measurements under lithiated divertor conditions
journal, October 2010

  • Kallman, J.; Jaworski, M. A.; Kaita, R.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3494381

Fast-ion energy loss during TAE avalanches in the National Spherical Torus Experiment
journal, December 2012


Non-linear modulation of short wavelength compressional Alfvén eigenmodes
journal, April 2013

  • Fredrickson, E. D.; Gorelenkov, N. N.; Podesta, M.
  • Physics of Plasmas, Vol. 20, Issue 4
  • DOI: 10.1063/1.4801663

Simulation of non-resonant internal kink mode with toroidal rotation in the National Spherical Torus Experiment
journal, July 2013

  • Wang, Feng; Fu, G. Y.; Breslau, J. A.
  • Physics of Plasmas, Vol. 20, Issue 7
  • DOI: 10.1063/1.4816026

Plasma simulation studies using multilevel physics models
journal, May 1999

  • Park, W.; Belova, E. V.; Fu, G. Y.
  • Physics of Plasmas, Vol. 6, Issue 5
  • DOI: 10.1063/1.873437

Linear stability and nonlinear dynamics of the fishbone mode in spherical tokamaks
journal, October 2013

  • Wang, Feng; Fu, G. Y.; Breslau, J. A.
  • Physics of Plasmas, Vol. 20, Issue 10
  • DOI: 10.1063/1.4824739

Self-consistent equilibrium model of low aspect-ratio toroidal plasma with energetic beam ions
journal, August 2003

  • Belova, E. V.; Gorelenkov, N. N.; Cheng, C. Z.
  • Physics of Plasmas, Vol. 10, Issue 8
  • DOI: 10.1063/1.1592155

Observation of Compressional Alfvén Modes During Neutral-Beam Heating on the National Spherical Torus Experiment
journal, September 2001


Internal amplitude, structure and identification of compressional and global Alfvén eigenmodes in NSTX
journal, March 2013


Correlation between Electron Transport and Shear Alfvén Activity in the National Spherical Torus Experiment
journal, March 2009


Mitigation of Alfvén Activity in a Tokamak by Externally Applied Static 3D Fields
journal, June 2013


A description of the full-particle-orbit-following SPIRAL code for simulating fast-ion experiments in tokamaks
journal, January 2013


Calculations of two-fluid magnetohydrodynamic axisymmetric steady-states
journal, November 2009


Steepest-descent moment method for three-dimensional magnetohydrodynamic equilibria
journal, January 1983


Physics issues of compact drift optimized stellarators
journal, June 2001


Electron cyclotron current drive efficiency in general tokamak geometry
journal, October 2003

  • Lin-Liu, Y. R.; Chan, V. S.; Prater, R.
  • Physics of Plasmas, Vol. 10, Issue 10
  • DOI: 10.1063/1.1610472

Numerical simulation of ion cyclotron waves in tokamak plasmas
journal, January 1999


Characteristics of low-q disruptions in PBX
journal, November 1988


Stabilization of external modes in tokamaks by resistive walls and plasma rotation
journal, April 1994


Resistive Wall Mode in Collisionless Quasistationary Plasmas
journal, September 2004


Benchmarking kinetic calculations of resistive wall mode stability
journal, May 2014

  • Berkery, J. W.; Liu, Y. Q.; Wang, Z. R.
  • Physics of Plasmas, Vol. 21, Issue 5
  • DOI: 10.1063/1.4873894

The role of kinetic effects, including plasma rotation and energetic particles, in resistive wall mode stability
journal, August 2010

  • Berkery, J. W.; Sabbagh, S. A.; Reimerdes, H.
  • Physics of Plasmas, Vol. 17, Issue 8
  • DOI: 10.1063/1.3474925

Neoclassical flows and transport in nonaxisymmetric toroidal plasmas
journal, January 1983


The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library
journal, June 2004

  • Pankin, Alexei; McCune, Douglas; Andre, Robert
  • Computer Physics Communications, Vol. 159, Issue 3
  • DOI: 10.1016/j.cpc.2003.11.002

Momentum-Transport Studies in High E × B Shear Plasmas in the National Spherical Torus Experiment
journal, August 2008


Observation of Plasma Toroidal-Momentum Dissipation by Neoclassical Toroidal Viscosity
journal, June 2006


Computation of three-dimensional tokamak and spherical torus equilibria
journal, May 2007

  • Park, Jong-kyu; Boozer, Allen H.; Glasser, Alan H.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2732170

Design and operation of a fast electromagnetic inductive massive gas injection valve for NSTX-U
journal, November 2014

  • Raman, R.; Jarboe, T. R.; Nelson, B. A.
  • Review of Scientific Instruments, Vol. 85, Issue 11
  • DOI: 10.1063/1.4885545

Neutral Gas Transport Modeling with DEGAS 2
journal, January 1994


Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces
journal, June 2009


Edge-Localized-Mode Suppression through Density-Profile Modification with Lithium-Wall Coatings in the National Spherical Torus Experiment
journal, August 2009


Triggered Confinement Enhancement and Pedestal Expansion in High-Confinement-Mode Discharges in the National Spherical Torus Experiment
journal, September 2010


The relationships between edge localized modes suppression, pedestal profiles and lithium wall coatings in NSTX
journal, September 2011


Varying the pre-discharge lithium wall coatings to alter the characteristics of the ELM-free H-mode pedestal in NSTX
journal, July 2013


Edge microstability of NSTX plasmas without and with lithium-coated plasma-facing components
journal, September 2013


Electron temperature gradient driven turbulence
journal, May 2000

  • Jenko, F.; Dorland, W.; Kotschenreuther, M.
  • Physics of Plasmas, Vol. 7, Issue 5
  • DOI: 10.1063/1.874014

Effect of a deuterium gas puff on the edge plasma in NSTX
journal, July 2014


High-speed imaging of edge turbulence in NSTX
journal, December 2003


Empiricial scaling of inter-ELM power widths in ASDEX Upgrade and JET
journal, July 2013


Type-I ELM power deposition profile width and temporal shape in JET
journal, August 2011


Type-I ELM filamentary substructure on the JET divertor target
journal, August 2011


A fully implicit, time dependent 2-D fluid code for modeling tokamak edge plasmas
journal, December 1992


Edge-plasma models and characteristics for magnetic fusion energy devices
journal, July 2002


Geometrical properties of a “snowflake” divertor
journal, June 2007


Liquid-metal plasma-facing component research on the National Spherical Torus Experiment
journal, November 2013


Lithium coatings on NSTX plasma facing components and its effects on boundary control, core plasma performance, and operation
journal, November 2010


Lithium sputtering from lithium-coated plasma facing components in the NSTX divertor
journal, August 2015


Nanostructuring of molybdenum and tungsten surfaces by low-energy helium ions
journal, July 2012

  • De Temmerman, Gregory; Bystrov, Kirill; Zielinski, Jakub J.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 30, Issue 4
  • DOI: 10.1116/1.4731196

Progress in understanding the enhanced pedestal H-mode in NSTX
journal, June 2014


Nonlinear flow generation by electrostatic turbulence in tokamaks
journal, July 2010

  • Wang, W. X.; Diamond, P. H.; Hahm, T. S.
  • Physics of Plasmas, Vol. 17, Issue 7
  • DOI: 10.1063/1.3459096

Global δf particle simulation of neoclassical transport and ambipolar electric field in general geometry
journal, December 2004

  • Wang, W. X.; Tang, W. M.; Hinton, F. L.
  • Computer Physics Communications, Vol. 164, Issue 1-3
  • DOI: 10.1016/j.cpc.2004.06.027

An Eulerian gyrokinetic-Maxwell solver
journal, April 2003


Magnetic topology, disruptions and electron heat transport
journal, January 1986


Reduced model prediction of electron temperature profiles in microtearing-dominated National Spherical Torus eXperiment plasmas
journal, August 2014

  • Kaye, S. M.; Guttenfelder, W.; Bell, R. E.
  • Physics of Plasmas, Vol. 21, Issue 8
  • DOI: 10.1063/1.4893135

Core transport of lithium and carbon in ELM-free discharges with lithium wall conditioning in NSTX
journal, July 2013


A reduced fast ion transport model for the tokamak transport code TRANSP
journal, April 2014


NOVA: A nonvariational code for solving the MHD stability of axisymmetric toroidal plasmas
journal, July 1987


1.5D quasilinear model and its application on beams interacting with Alfvén eigenmodes in DIII-D
journal, September 2012

  • Ghantous, K.; Gorelenkov, N. N.; Berk, H. L.
  • Physics of Plasmas, Vol. 19, Issue 9
  • DOI: 10.1063/1.4752011

The effect of the fast-ion profile on Alfvén eigenmode stability
journal, August 2013


    Works referencing / citing this record:

    Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP
    journal, April 2017


    Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
    journal, April 2016

    • Banerjee, Santanu; Diallo, A.; Zweben, S. J.
    • Physics of Plasmas, Vol. 23, Issue 4
    • DOI: 10.1063/1.4946871

    Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
    journal, March 2019


    Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
    journal, April 2016

    • Banerjee, Santanu; Diallo, A.; Zweben, S. J.
    • Physics of Plasmas, Vol. 23, Issue 4
    • DOI: 10.1063/1.4946871

    Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP
    journal, April 2017


    Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
    journal, March 2019