Strong electron dissipation by a mode converted ion hybrid (Bernstein) wave

Strong electron dissipation by a mode converted ion hybrid (Bernstein) wave

Strong electron dissipation by a mode converted ion hybrid (Bernstein) wave 150 150 UKAEA Opendata

Strong electron dissipation by a mode converted ion hybrid (Bernstein) wave

The fast wave approximation, extended to include the effects of electron dissipation, is used to calculate the power mode converted to the ion hybrid (Bernstein) wave in the vicinity of the ion hybrid resonance. The power absorbed from the fast wave by ion cyclotron damping and by electron Landau and transit time damping (including cross terms) is also calculated. The fast wave equation is solved for either the Budden configuration of a cut-off-resonance pair or the triplet configuration of cutoff- resonance-cut-off. The fraction mode converted is compared for the triplet case and the Budden multi-pass situation. The electron damping rate of the ion hybrid wave is obtained from the local dispersion relation and a ray tracing code is used to calculate the damping of the mode converted ion hybrid wave by the electrons as it propagates away from the resonance. Quantitative results for a range of conditions relevant to JET, TFTR and ITER are given.

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01/01/1996