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Published June 1985 | Published
Journal Article Open

Investigation of finite beta modified drift wave in a tokamak plasma


The saturated state of a low-frequency, coherent, m=2, global mode has been studied in the Encore tokamak using probe techniques. The mode is found to have large fluctuations in density, electron temperature, space potential, and magnetic field. The experimental measurements were compared with the predictions of a computer code, based on a linear, two-fluid theory of the coupling of drift and shear-Alfvén modes. This comparison led to the identification of the mode as a finite beta modified drift wave.

Additional Information

© 1985 American Institute of Physics. Received 20 August 1984; accepted 3 February 1985. This work was taken from the doctoral dissertation of one of the authors (E.D.F.). One of the authors (E.D.F.) would like to thank Paulette Liewer and Stuart Zweben for many helpful discussions during the course of this work. This work was supported in part by U.S. Department of Energy Contract No. DE-FG03-84ER53173.

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