Effects of external kink and fishbone-like modes on energetic particle transport in tokamak plasmas
Nuclear Fusion, 2022•iopscience.iop.org
Transport and loss of beam injected energetic particles (EPs) due to three-dimensional
perturbations, associated with the external kink (XK) instability and fishbone-like mode
(FLM), are numerically investigated utilizing the guiding center following code ORBIT for
static toroidal plasmas in HL-2A. The perturbation structure for the XK is computed by the
MARS-F code and then mapped to the Boozer coordinates as defined in ORBIT. The
simulation shows that the EP profile experiences a significant change in the middle of the …
perturbations, associated with the external kink (XK) instability and fishbone-like mode
(FLM), are numerically investigated utilizing the guiding center following code ORBIT for
static toroidal plasmas in HL-2A. The perturbation structure for the XK is computed by the
MARS-F code and then mapped to the Boozer coordinates as defined in ORBIT. The
simulation shows that the EP profile experiences a significant change in the middle of the …
Abstract
Transport and loss of beam injected energetic particles (EPs) due to three-dimensional perturbations, associated with the external kink (XK) instability and fishbone-like mode (FLM), are numerically investigated utilizing the guiding center following code ORBIT for static toroidal plasmas in HL-2A. The perturbation structure for the XK is computed by the MARS-F code and then mapped to the Boozer coordinates as defined in ORBIT. The simulation shows that the EP profile experiences a significant change in the middle of the plasma column, when the XK-induced radial magnetic field perturbation amplitude, normalized by the equilibrium field, exceeds a threshold value of about
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