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The existence of negative-energy perturbations in a linearly stable plasma may be related to non-linear instabilities and cause anomalous transport. This paper discusses such problems within the framework of collisionless Maxwell drift kinetic theory. The general expression for the second order perturbation energy of a Maxwell drift kinetic system is evaluated for the case of a magnetically confined plasma. The equilibrium properties of the plasma under consideration are then discussed. The second order perturbation energy with vanishing initial field perturbations is obtained. The conditions for the existence of negative-energy modes are derived, and the consequences of the condition for the existence of perpendicular negative-energy modes in tokamak-like equilibria are examined. The same issues are addressed for stellarator-like equilibria. The main results of the work are summarised.

Additional information

Authors: THROUMOULOPOULOS G N, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);PFIRSCH D, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 6/318 EN (1993) 40 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
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