This submodule defines an equilibrium in cylindrical geometry with an axial current profile (), modelling a solar coronal loop in which discrete Alfvén waves are present. The geometry can be overridden in the parfile.
This equilibrium is taken from Keppens, Rony, Ronald AM Van Der Linden, and Marcel Goossens. "Non-adiabatic discrete Alfven waves in coronal loops and prominences.", Solar physics 144.2 (1993): 267-281.
Default values are given by
and normalisations given by
and can all be changed in the parfile.