RESISTIVE BALLOONING MODES IN AN AXISYMMETRIC TOROIDAL PLASMA WITH LONG MEAN FREE PATH
Tokamak devices normally operate at such high temperatures that the resistive fluid description is inappropriate. In particular, the collision frequency may be low enough for trapped particles to exist. However, on account of the high conductivity of such plasmas, one can identify two separate scale lengths when discussing resistive ballooning modes. By describing plasma motion on one of these, the connection length, in terms of kinetic theory the dynamics of trapped particles can be incorporated. On the resistive scale length, this leads to a description in terms of modified fluid equations in which trapped particle effects appear. The resulting equations are analyzed and the presence of trapped particles is found to modify the stability properties qualitatively.
Bibliographic Reference: PHYSICS OF FLUIDS, VOL. 28 (1985), NO. 7, PP. 2201- 2208
Record Number: 1989124059300 / Last updated on: 1987-01-01
Available languages: en