FIELD-ALIGNED ELECTRIC-FIELD ACCOMPANIED BY DRIFT ALFVEN WAVES IN AN INHOMOGENEOUS-PLASMA

A field‐aligned electric field, δE‖↑ which is accompanied by drift Alfvén wave perturbations in an inhomogeneous plasma, can be expressed in simple terms as   where ψ and δψ are the magnetic flux function and its perturbation, Te is the electron temperature, n(ψ) is the plasma density, k⟂ is the perpendicular wave number, li is the ion Larmor radius and l is the coordinate along a magnetic line of force. Copyright 1990 by the American Geophysical Union.