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Ion Bernstein wave studies on microtor

In recent years heating in the ion cyclotron range of frequency (ICRF) has been under active study as an efficient source of supplementary heating in tokamak plasmas. At UCLA far-infrared (FIR) collective Thomson scattering has been employed to directly probe and identify the various plasma waves, thereby improving the understanding of ICRF wave physics. In addition, the measurement of the dispersion of externally excited ion Bernstein waves has resulted in a determination of ion temperature at a number of radial locations. The ion Bernstein waves are identified as being generated through mode conversion of the fast magnetosonic wave at the second harmonic ion cyclotron layer.