The α-effect generated by standing Alfvén waves
Abstract
The mean electromotive force generated by nonlinear standing Alfvén waves propagating along the mean magnetic field is investigated. It is shown that the α-effect can exist owing to the interaction between oppositely propagating two waves, provided that the initial fields have non-zero helicity. The result is discussed in the context of field-aligned currents and periodic particle flux variations in the earth's magnetosphere.
- Publication:
-
Journal of Plasma Physics
- Pub Date:
- October 1988
- DOI:
- 10.1017/S0022377800013325
- Bibcode:
- 1988JPlPh..40..353N
- Keywords:
-
- Collisionless Plasmas;
- Electromotive Forces;
- Magnetohydrodynamic Waves;
- Standing Waves;
- Earth Magnetosphere;
- Field Aligned Currents;
- Solar Terrestrial Interactions;
- Wave Interaction;
- Wave Propagation;
- Plasma Physics