Dielectric response of plasma in reversed field pinches near the ion cyclotron frequency

Abstract

The dielectric tensor of reversed field pinch (RFP) plasma is calculated near the magnetic axis for cylindrical azimuthally symmetric equilibria in the limit k⊥ρL→0. Particle orbits are calculated to first order in the drift approximation near the axis such that geometrical corrections to gyrophase are included. It is demonstrated that these corrections are important for evaluation of the plasma heating rate near ion cyclotron resonance in RFPs while they can be neglected in tokamak modeling. Geometrical effects of this kind become important in RFPs because the ratio of poloidal and toroidal magnetic field components is substantially larger in RFPs relative to that in tokamaks.

Anomalous impurity ion heating from Alfvénic cascade in the reversed field pinch

“…We can also compare the above result with previous calculations of the dielectric response of the plasma near the ion cyclotron frequency by Svidzinski. 34 These results differ by a constant factor.…”