Abstract
A new derivation of the dielectric tensor elements for the special case of wave propagation perpendicular to a constant, uniform magnetic field in a collisionless, non-relativistic, multi-species magnetised plasma modelled with isotropic kappa distributions is presented. The new approach is consistent with the one commonly used for parallel propagation, unifying the starting point for each special case. The results obtained agree with those of previous calculations, verifying their correctness, but, in addition, alternative forms of the dielectric tensor elements are given as by-products of the new calculation. The generality of the method used and its aptness for use with the kappa distribution should make it suitable for similar calculations using kappa distribution variants, such as a bi-kappa distribution.
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