We have analyzed the effect of a small poloidal field on the propagation and absorption of electrostatic ion Bernstein waves in cylindrical geometry, assuming rci/L≪1, L being the spatial scale length of the electrostatic potential Φ. For uniform axial current density, the helical field lines cause a shift in the effective k∥, resulting in an asymmetry between waves propagating at the cyclotron resonance layer. Also, the radial dependence of k⊥ limits the radial extent of propagation. Solutions of Φ(r) for excitation by a localized antenna are given.
Applications of Radio-Frequency Power to Plasmas: 7th Topical Conference
- Pub Date:
- September 1987
- Plasma heating by particle beams;
- Plasma interactions with antennas;
- plasma-filled waveguides;
- Tokamaks spherical tokamaks