Turbulence Measurements by Digital Spectral Estimation in the Ohmically Heated Proto-Cleo Torsatron.
Abstract
Low frequency fluctuations observed in the ohmically heated plasma of the Proto-Cleo Torsatron are examined. Density fluctuations inferred by ion saturation current of double Langmuir probes were Fourier analyzed using digital signal processing techniques. Results indicate the fluctuations to be of a turbulent nature with no narrow band coherent phenomena observed for frequencies less than 500 kHz. The fluctuations examined are believed to be driven by the ohmic heating current and result in diffusion coefficient estimates consistent with fluctuation induced diffusion.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- February 1979
- Bibcode:
- 1979PhDT........41C
- Keywords:
-
- Physics: Fluid and Plasma;
- Digital Techniques;
- Plasma Turbulence;
- Plasmas (Physics);
- Signal Processing;
- Diffusion Coefficient;
- Fourier Analysis;
- Low Frequencies;
- Plasma Density;
- Spectrum Analysis;
- Plasma Physics