Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp01tb09j831f
 Title: Drift kinetic effects on the plasma response in high beta spherical tokamak experiments Contributors: Wang, Z.R.Park, J.-K.Menard, J.E.Liu, Y.Q.Kaye, S.M.Gerhardt, S.U. S. Department of Energy contract number DE-AC02-09CH11466 Keywords: Kinetic plasma responseMHDNSTXTokamak Issue Date: Sep-2017 Publisher: Princeton Plasma Physics Laboratory, Princeton University Related Publication: Nuclear Fusion (September 2017) 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. URI: http://arks.princeton.edu/ark:/88435/dsp01tb09j831f Appears in Collections: NSTX-U