This module is an implementation of the model by
Franco Porcelli to compute the conditions needed to
trigger a sawtooth crash in tokamak plasmas.
It
is assumed, in the Porcelli model, that each sawtooth
crash is triggered by the onset of an $m=1$ mode. The
macroscopic drive for this mode is associated with
an effective potential energy functional, that includes
effects from toroidicity and plasma shaping and kinetic
effects arising from trapped thermal particles and
fast ions, respectively.
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