Overview of NSTX Upgrade Initial Results and Modelling Highlights

Menard, J. E. ; Allain, J. P.; Battaglia, D. J. ; Bedoya, F.; Bell, R. E. ; Belova, E. ; Berkery, J. W.; Boyer, M. D. ; Crocker, N.; Diallo, A. ; Ebrahimi, F. ; Ferraro, N. ; Fredrickson, E. ; Frerichs, H.; Gerhardt, S. ; Gorelenkov, N. ; Guttenfelder, W. ; Heidbrink, W.; Kaita, R. ; Kaye, S. M. ; Kriete, D. M.; Kubota, S.; LeBlanc, B. P. ; Liu, D.; Lunsford, R. ; Mueller, D. ; Myers, C. E. ; Ono, M. ; Park, J. -K. ; Podesta, M. ; Raman, R.; Reinke, M.; Ren, Y. ; Sabbagh, S. M.; Schmitz, O.; Scotti, F.; Sechrest, Y.; Skinner, C. H. ; Smith, D. R.; Soukhanovskii, V.; Stoltzfus-Dueck, T. ; Yuh, H.; Wang, Z. ; Waters, I.; Ahn, J. -W.; Andre, A. ; Barchfeld, R.; Beiersdorfer, P.; Bertelli, N. ; Bhattacharjee, A. ; Boyle, D.; Brennan, D.; Buttery, R.; Capece, A.; Canal, G.; Canik, J.; Chang, C. S. ; Darrow, D. ; Delgado-Aparicio, L. ; Domier, C.; Ethier, S. ; Evans, T.; Ferron, J.; Finkenthal, M.; Fonck, R.; Gan, K.; Gates, D. ; Goumiri, I.; Gray, T.; Hosea, J. ; Humphreys, D.; Jarboe, T.; Jardin, S. ; Jaworski, M. A. ; Koel, B.; Kolemen, E. ; Ku, S. ; LaHaye, R. J.; Levinton, F.; Luhmann Jr., N.; Maingi, R. ; Maqueda, R.; McKee, G.; Meier, E.; Myra, J.; Perkins, R. ; Poli, F. ; Rhodes, T.; Riquezes, J.; Rowley, C.; Russell, D.; Schuster, E.; Stratton, B. ; Stutman, D.; Taylor, G. ; Tritz, K.; Wang, W. ; Wirth, B.; Zweben, S. J.
Issue date: 2017
Creative Commons Attribution 4.0 International (CC BY)
Cite as:
Menard, J. E., Allain, J. P., Battaglia, D. J., Bedoya, F., Bell, R. E., Belova, E., Berkery, J. W., Boyer, M. D., Crocker, N., Diallo, A., Ebrahimi, F., Ferraro, N., Fredrickson, E., Frerichs, H., Gerhardt, S., Gorelenkov, N., Guttenfelder, W., Heidbrink, W., Kaita, R., Kaye, S. M., Kriete, D. M., Kubota, S., LeBlanc, B. P., Liu, D., Lunsford, R., Mueller, D., Myers, C. E., Ono, M., Park, J. -K., Podesta, M., Raman, R., Reinke, M., Ren, Y., Sabbagh, S. M., Schmitz, O., Scotti, F., Sechrest, Y., Skinner, C. H., Smith, D. R., Soukhanovskii, V., Stoltzfus-Dueck, T., Yuh, H., Wang, Z., Waters, I., Ahn, J. -W., Andre, A., Barchfeld, R., Beiersdorfer, P., Bertelli, N., Bhattacharjee, A., Boyle, D., Brennan, D., Buttery, R., Capece, A., Canal, G., Canik, J., Chang, C. S., Darrow, D., Delgado-Aparicio, L., Domier, C., Ethier, S., Evans, T., Ferron, J., Finkenthal, M., Fonck, R., Gan, K., Gates, D., Goumiri, I., Gray, T., Hosea, J., Humphreys, D., Jarboe, T., Jardin, S., Jaworski, M. A., Koel, B., Kolemen, E., Ku, S., LaHaye, R. J., Levinton, F., Luhmann Jr., N., Maingi, R., Maqueda, R., McKee, G., Meier, E., Myra, J., Perkins, R., Poli, F., Rhodes, T., Riquezes, J., Rowley, C., Russell, D., Schuster, E., Stratton, B., Stutman, D., Taylor, G., Tritz, K., Wang, W., Wirth, B., & Zweben, S. J. (2017). Overview of NSTX Upgrade Initial Results and Modelling Highlights [Data set]. Princeton Plasma Physics Laboratory, Princeton University. https://doi.org/10.11578/1367890
  author      = {Menard, J. E. and
                Allain, J. P. and
                Battaglia, D. J. and
                Bedoya, F. and
                Bell, R. E. and
                Belova, E. and
                Berkery, J. W. and
                Boyer, M. D. and
                Crocker, N. and
                Diallo, A. and
                Ebrahimi, F. and
                Ferraro, N. and
                Fredrickson, E. and
                Frerichs, H. and
                Gerhardt, S. and
                Gorelenkov, N. and
                Guttenfelder, W. and
                Heidbrink, W. and
                Kaita, R. and
                Kaye, S. M. and
                Kriete, D. M. and
                Kubota, S. and
                LeBlanc, B. P. and
                Liu, D. and
                Lunsford, R. and
                Mueller, D. and
                Myers, C. E. and
                Ono, M. and
                Park, J. -K. and
                Podesta, M. and
                Raman, R. and
                Reinke, M. and
                Ren, Y. and
                Sabbagh, S. M. and
                Schmitz, O. and
                Scotti, F. and
                Sechrest, Y. and
                Skinner, C. H. and
                Smith, D. R. and
                Soukhanovskii, V. and
                Stoltzfus-Dueck, T. and
                Yuh, H. and
                Wang, Z. and
                Waters, I. and
                Ahn, J. -W. and
                Andre, A. and
                Barchfeld, R. and
                Beiersdorfer, P. and
                Bertelli, N. and
                Bhattacharjee, A. and
                Boyle, D. and
                Brennan, D. and
                Buttery, R. and
                Capece, A. and
                Canal, G. and
                Canik, J. and
                Chang, C. S. and
                Darrow, D. and
                Delgado-Aparicio, L. and
                Domier, C. and
                Ethier, S. and
                Evans, T. and
                Ferron, J. and
                Finkenthal, M. and
                Fonck, R. and
                Gan, K. and
                Gates, D. and
                Goumiri, I. and
                Gray, T. and
                Hosea, J. and
                Humphreys, D. and
                Jarboe, T. and
                Jardin, S. and
                Jaworski, M. A. and
                Koel, B. and
                Kolemen, E. and
                Ku, S. and
                LaHaye, R. J. and
                Levinton, F. and
                Luhmann Jr., N. and
                Maingi, R. and
                Maqueda, R. and
                McKee, G. and
                Meier, E. and
                Myra, J. and
                Perkins, R. and
                Poli, F. and
                Rhodes, T. and
                Riquezes, J. and
                Rowley, C. and
                Russell, D. and
                Schuster, E. and
                Stratton, B. and
                Stutman, D. and
                Taylor, G. and
                Tritz, K. and
                Wang, W. and
                Wirth, B. and
                Zweben, S. J.},
  title       = {{Overview of NSTX Upgrade Initial Results
                 and Modelling Highlights}},
  publisher   = {{Princeton Plasma Physics Laboratory, Pri
                nceton University}},
  year        = 2017,
  url         = {https://doi.org/10.11578/1367890}

The National Spherical Torus Experiment (NSTX) has undergone a major upgrade, and the NSTX Upgrade (NSTX-U) Project was completed in the summer of 2015. NSTX-U first plasma was subsequently achieved, diagnostic and control systems have been commissioned, H-Mode accessed, magnetic error fields identified and mitigated, and the first physics research campaign carried out. During 10 run weeks of operation, NSTX-U surpassed NSTX-record pulse-durations and toroidal fields, and high-performance ~1MA H-mode plasmas comparable to the best of NSTX have been sustained near and slightly above the n=1 no-wall stability limit and with H-mode confinement multiplier H98y2 above 1. Transport and turbulence studies in L-mode plasmas have identified the coexistence of at least two ion-gyro-scale turbulent micro-instabilities near the same radial location but propagating in opposite (i.e. ion and electron diamagnetic) directions. These modes have the characteristics of ion-temperature gradient and micro-tearing modes, respectively, and the role of these modes in contributing to thermal transport is under active investigation. The new second more tangential neutral beam injection was observed to significantly modify the stability of two types of Alfven Eigenmodes. Improvements in offline disruption forecasting were made in the areas of identification of rotating MHD modes and other macroscopic instabilities using the Disruption Event Characterization and Forecasting (DECAF) code. Lastly, the Materials Analysis and Particle Probe (MAPP) was utilized on NSTX-U for the first time and enabled assessments of the correlation between boronized wall conditions and plasma performance. These and other highlights from the first run campaign of NSTX-U are described.

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