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The profiles of the first three Balmer lines of hydrogen are measured in a turbulent heating experiment. From the position of Stark satellites the field strength of low frequency oscillations (ω ~ ω

AbstPact-Low-frequency density fluctuations in the outer region of the TORTUR Tokzmak are observed by microwave scattering. The frequency spectrum, measured for a fixed wave vector, is very broad and can be explained by drift waves, predominantly of the coilisionless type. A considerable enhancement of this kind of turbulence is found after the application of fast high-voltage current pulses or! top of the current plateau, showing a proportionality with the square of the plasma current.

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