Magnetic slab
Alfvén mode on multiple iso-surfaces
In this section:
Alfvén Mode
Multiple iso-surface
Symmetric slab
Kink
Sausage
Asymmetric slab
Kink
Sausage
The Alfvén mode is decoupled from the magneto-acoustic modes in a magnetic slab.
The perturbations are in the homogeneous direction (y-direction), meaning that each magnetic iso-surface within the slab can oscillate independently without perturbing the plasma density or pressure.
Consequently, the parameters (and asymmetry) of the plasma external to the slab do not affect the propagation of this mode.
Videos
Key:
Red lines – magnetic field lines
Grey surface – slab boundaries
White arrows – velocity direction field
Blue to Red volume – negative to positive density perturbation
Download videos
Download the videos on this page (ZIP, 5.1MB).
Credits
The videos were produced by Matthew Allcock with Mayavi, an application and library for interactive scientific data visualisation and 3D plotting in Python.