Observation of Second-Harmonic Ion Bernstein Waves Excited by Fast-Wave Mode Conversion in the Microtor Tokamak

Abstract

This paper reports the first conclusive observation of ion Bernstein waves near the second-harmonic cyclotron layer in a single-ion-species tokamak plasma. The interpretation that the ion Bernstein waves are generated through fast-wave mode conversion at the second-harmonic cyclotron layer is supported by wave dispersion measurements as well as the observation of the long-wavelength fast wave by laser scattering techniques.