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rf power in the lower-hybrid-frequency range is shown to produce plasma of density in the 10^13 cm^-3 range in the small toroidal heliac SHEILA by launching helicon waves. Measurements of wave dispersion and mode structure confirm that an m=1 helicon mode is launched inside the highly asymmetric plasma confined in the device. The suggestion that the main energy-transfer mechanism is by Landau damping is strongly supported by the experimental data.
Loewenhardt et al. (Fri,) studied this question.