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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];  [1];  [11];  [1];  [12];  [13];  [1];  [2];  [1];  [14];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [15];  [4];  [11];  [1];  [13];  [13];  [13];  [16];  [17];  [1];  [1];  [1];  [1];  [18];  [1];  [1];  [19];  [2];  [2];  [1];  [20];  [12];  [21];  [22];  [6];  [1];  [13];  [23];  [24];  [1];  [1];  [1];  [1];  [1];  [19];  [1];  [1];  [1];  [25];  [13];  [13];  [1];  [26];  [27];  [19];  [28];  [25];  [1];  [1];  [1];  [26];  [17];  [1];  [6];  [1];  [1];  [29];  [30];  [15];  [24];  [1];  [1];  [13];  [1];  [25];  [1];  [1];  [1];  [1];  [24];  [1];  [19];  [19];  [15];  [28];  [2];  [31];  [32];  [6];  [29];  [17];  [33];  [28];  [1];  [17];  [13];  [1];  [17];  [6];  [1];  [1];  [1];  [34];  [33];  [1];  [34];  [13];  [1];  [1];  [1];  [1];  [35];  [9];  [1];  [26];  [1];  [1] « less
+ Show Author Affiliations
  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. University of Wisconsin, Madison, WI (United States)
  18. Univ. of Washington, Seattle, WA (United States)
  19. Princeton University, NJ (United States)
  20. CompX, Del Mar, CA (United States)
  21. Univ. of California, Irvine, CA (United States)
  22. National Inst. for Fusion Science, Toki (Japan)
  23. XCEL, Oak Ridge, TN (United States)
  24. University of Washington, Seattle, WA (United States)
  25. University of California, Los Angeles, CA (United States)
  26. Nova Photonics, Princeton, NJ (United States)
  27. University of California, Irvine, CA (United States)
  28. University of Illinois, Urbana-Champaign, IL (United States)
  29. University of Colorado, Boulder, CO (United States)
  30. University of California, Davis, CA (United States)
  31. Columbia University, New York, NY (United States)
  32. Lehigh University, Bethlehem, PA (United States)
  33. Purdue University, West Lafayette, IN (United States)
  34. Johns Hopkins University, Baltimore, MD (United States)
  35. University of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1888620
Alternate Identifier(s):
OSTI ID: 1256734
Report Number(s):
LLNL-JRNL-840084; PPPL-5092
Journal ID: ISSN 0029-5515; 1061331; TRN: US2309907
Grant/Contract Number:  
AC52-07NA27344; AC02-09CH11466
Resource Type:
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., Luhmann, Jr., N. N., 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.
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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., Luhmann, Jr., N. N., 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. https://doi.org/10.1088/0029-5515/55/10/104002
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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., Luhmann, Jr., N. N., 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. https://doi.org/10.1088/0029-5515/55/10/104002. https://www.osti.gov/servlets/purl/1888620.
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@article{osti_1888620,
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 Luhmann, Jr., N. N. 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},
number = 10,
volume = 55,
place = {United States},
year = {Fri Mar 27 00:00:00 EDT 2015},
month = {Fri Mar 27 00:00:00 EDT 2015}
}
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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

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

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 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

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

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

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

Resistive Wall Mode in Collisionless Quasistationary Plasmas
journal, September 2004

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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    journal, June 2019

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