Trapped fast particle destabilization of internal kink mode for the locally flattened q-profile with an inflection point
XQ Wang, RB Zhang, G Meng - Physics of Plasmas, 2016 - pubs.aip.org
The destabilization of ideal internal kink modes by trapped fast particles in tokamak plasmas
with a “shoulder”-like equilibrium current is investigated. It is found that energetic particle
branch of the mode is unstable with the driving of fast-particle precession drifts and
corresponds to a precessional fishbone. The mode with a low stability threshold is also more
easily excited than the conventional precessional fishbone. This is different from earlier
studies for the same equilibrium in which the magnetohydrodynamic (MHD) branch of the …
with a “shoulder”-like equilibrium current is investigated. It is found that energetic particle
branch of the mode is unstable with the driving of fast-particle precession drifts and
corresponds to a precessional fishbone. The mode with a low stability threshold is also more
easily excited than the conventional precessional fishbone. This is different from earlier
studies for the same equilibrium in which the magnetohydrodynamic (MHD) branch of the …
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