Cross correlation of the low-frequency electromagnetic excitations and anomalous diffusion in a plasma

Summary form only given, as follows. It is known that the magnetic perturbations in a plasma result in enhanced transport. A more interesting and complicated situation arises when the potential and magnetic fluctuations are correlated, requires further analytical investigation. Such a correlation may be induced by an external current and electric field or neutral beam injection etc. The general renormalized statistical approach with cross-field correlations applied to the study of long-wave (wave lengths greater than the ion Larmor radius) low-frequency (frequencies not exceeding the ion Larmor frequency) electro-magnetic plasma fluctuations, yields cross correlations that produce a negative correction to the renormalized damping coefficient of the electro-static perturbations and therefore, attenuate the diffusion.