Modeling of toroidal torques exerted by internal kink instability in a tokamak plasma

Zhang, N.; Liu, Y. Q.; Yu, D. L.; Wang, S.; Xia, G. L.; Dong, G. Q.; Bai, X.

doi:10.1063/1.4995271

Modeling of toroidal torques exerted by internal kink instability in a tokamak plasma

Journal Article · Mon Jul 24 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4995271· OSTI ID:1535333

Zhang, N. ^[1]; Liu, Y. Q. ^[2]; Yu, D. L. ^[3]; ^[3]; Xia, G. L. ^[3]; Dong, G. Q. ^[3]; Bai, X. ^[4]

Southwestern Inst. of Physics, Chengdu (China); DOE/OSTI
Southwestern Inst. of Physics, Chengdu (China); General Atomics, San Diego, CA (United States)
Southwestern Inst. of Physics, Chengdu (China)
Southwestern Inst. of Physics, Chengdu (China); Tsinghua Univ., Beijing (China)

Toroidal modeling efforts are initiated to systematically compute and compare various toroidal torques, exerted by an unstable internal kink in a tokamak plasma, using the MARS-F/K/Q suite of codes. The torques considered here include the resonant electromagnetic torque due to the Maxwell stress (the EM or JXB torque), the neoclassical toroidal viscous (NTV) torque, and the torque associated with the Reynolds stress. Numerical results show that the relative magnitude of the net resonant electromagnetic and the Reynolds stress torques increases with the equilibrium flow speed of the plasma, whilst the net NTV torque follows the opposite trend. The global flow shear sensitively affects the Reynolds stress torque, but not the electromagnetic and the NTV torques. Detailed examinations reveal dominant contributions to the Maxwell and Reynolds stress torques, in terms of the poloidal harmonic numbers of various perturbation fields, as well as their relative toroidal phasing.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FC02-04ER54698; FG02-95ER54309

OSTI ID:: 1535333

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 24; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Toroidal modeling of interaction between internal kink mode and plasma flow Zhang, N.; Liu, Y. Q.; Wang, S. Physics of Plasmas, Vol. 25, Issue 9 https://doi.org/10.1063/1.5040248	journal	September 2018
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