Low Frequency Fluctuations of the Ohmically Heated Plasma in the Proto-Cleo Torsatron

摘要

Low frequency, f < 500 kHz, turbulent density fluctuations have been observed in the ohmically heated plasma of the Proto-Cleo torsatron. The power density spectrum indicates a spectral decay of the form f exp -2 exp 5 with no coherent modes present in the observed band. Phase spectral characteristics indicate wave number estimates which vary in magnitude and direction consistent with drift wave phenomena. Parallel wave numbers are coupled proportionally to the shear. (ERA citation 05:005164)