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ICC 2010 Abstracts Abstract Details
Modifying Interchange Turbulence through the Application of Rotating Electrostatic Perturbations to a Dipole Confined Plasma
Author: M. W. Worstell
Requested Type: Poster Only
Submitted: 2009-12-04 14:54:14
Co-authors: A.M. Senter, M.E. Mauel
Contact Info:
Columbia University
500 W 120th St
New York, NY 10025
USA
Abstract Text:
Previous experiments on the Collisionless Terella Experiment (CTX) have determined the structure of turbulent and unstable interchange mixing. An ERCH generated plasma confined by a mechanically supported dipole magnet, plasmas in CTX are dominated by the Hot Electron Interchange mode until gas fueling is increased sufficiently to enter a regime dominated by turbulence. Statistical analysis revealed these fluctuations to be spatially broad and temporally chaotic, consistent with the nonlinear inverse energy cascade predicted by two-dimensional turbulence theory. We report new experiments to directly modify the turbulent spectrum by amplifying or controlling individual wavelengths through the application of electrostatic perturbations via an equatorial probe array. Rotating perturbations with both feedback phase-controlled and with constant frequency open-loop perturbations will be discussed.
Characterization: A5,E4
Comments:
Special instructions: Please place with other Dipole Experimental Posters: Sorting order is 1) Garnier, 2) Kesner, 3) Davis, 4) Woskov, 5) Kardon, 6) Worstell, 7) Senter.
