U.S. Department of EnergyOffice of Scientific and Technical Information
Drift kinetic effects on the plasma response in high beta spherical tokamak experiments
Abstract
High $$\beta$$ plasma response to the rotating n=1 external magnetic perturbations is numerically studied and compared with National Spherical Torus eXperiment (NSTX). The hybrid magnetohydrodynamic(MHD)-kinetic modeling shows the drift kinetic effects are important to resolve the disagreement of plasma response between the ideal MHD prediction and the NSTX experimental observation when plasma pressure reaches and exceeds the no-wall limit [F. Troyon et al., Plasma Phys. Control. Fusion \textbf{26}, 209 (1984)]. Since the external rotating fields and high plasma rotation are presented in NSTX experiments, the importance of resistive wall effect and plasma rotation on determining the plasma response is also identified, where the resistive wall suppresses the plasma response through the wall eddy current. The inertial energy, due to plasma rotation, destabilizes the plasma. The complexity of plasma response, in this study, indicates that MHD modeling, including comprehensive physics e.g. the drift kinetic effects, resistive wall and plasma rotation, is essential to reliably predict the plasma behavior in high beta spherical tokamak device.
- Authors:
- Publication Date:
- DOE Contract Number:
- AC02-09CH11466
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- U. S. Department of Energy
- Keywords:
- Tokamak
- OSTI Identifier:
- 1562044
- DOI:
- https://doi.org/10.11578/1562044
Citation Formats
Wang, Z R, Park, J -K, Menard, J E, Liu, Y Q, Kaye, S M, and Gerhardt, S. Drift kinetic effects on the plasma response in high beta spherical tokamak experiments. United States: N. p., 2017.
Web. doi:10.11578/1562044.
Wang, Z R, Park, J -K, Menard, J E, Liu, Y Q, Kaye, S M, & Gerhardt, S. Drift kinetic effects on the plasma response in high beta spherical tokamak experiments. United States. doi:https://doi.org/10.11578/1562044
Wang, Z R, Park, J -K, Menard, J E, Liu, Y Q, Kaye, S M, and Gerhardt, S. 2017.
"Drift kinetic effects on the plasma response in high beta spherical tokamak experiments". United States. doi:https://doi.org/10.11578/1562044. https://www.osti.gov/servlets/purl/1562044. Pub date:Fri Sep 01 00:00:00 EDT 2017
@article{osti_1562044,
title = {Drift kinetic effects on the plasma response in high beta spherical tokamak experiments},
author = {Wang, Z R and Park, J -K and Menard, J E and Liu, Y Q and Kaye, S M and Gerhardt, S},
abstractNote = {High $\beta$ plasma response to the rotating n=1 external magnetic perturbations is numerically studied and compared with National Spherical Torus eXperiment (NSTX). The hybrid magnetohydrodynamic(MHD)-kinetic modeling shows the drift kinetic effects are important to resolve the disagreement of plasma response between the ideal MHD prediction and the NSTX experimental observation when plasma pressure reaches and exceeds the no-wall limit [F. Troyon et al., Plasma Phys. Control. Fusion \textbf{26}, 209 (1984)]. Since the external rotating fields and high plasma rotation are presented in NSTX experiments, the importance of resistive wall effect and plasma rotation on determining the plasma response is also identified, where the resistive wall suppresses the plasma response through the wall eddy current. The inertial energy, due to plasma rotation, destabilizes the plasma. The complexity of plasma response, in this study, indicates that MHD modeling, including comprehensive physics e.g. the drift kinetic effects, resistive wall and plasma rotation, is essential to reliably predict the plasma behavior in high beta spherical tokamak device.},
doi = {10.11578/1562044},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}