Negative-energy modes in a magnetically confined plasma in the framework of Maxwell-drift kinetic theory
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.
Bibliographic Reference: Report: IPP 6/318 EN (1993) 40 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199311514 / Last updated on: 1994-11-28
Original language: en
Available languages: en