EXPERIMENTAL MAGNETOHYDRODYNAMIC TURBULENCE INVESTIGATIONS
AEROSPACE CORP EL SEGUNDO CA
Pagination or Media Count:
Previous investigations of MHD turbulence are reviewed briefly, and a short description of the apparatus, a stabilized linear pinch device, is presented. Improvements in the frequency response of the magnetic probes and RC integrators and modifications to the design of the high-pass filters are discussed. The following experimental results obtained during the recent six month period are presented 1 autocorrelation measurements have been performed on a set of Kerr cell photographs of the pinch to determine the wavelength of the instabilities, 2 promising results have been obtained using an x-y oscilloscope to determine the degree of correlation between signals from magnetic probes separated by varying distances, 3 Alfven wave propagation of the magnetic field fluctuations was observed by the phase shift between two probe signals, 4 some analyses have been made of the rms values of B and its first and 2nd derivatives to t, and the maximum frequency of the turbulence has been determined, and 5 high-quality Kerr cell photographs of the pinch have been taken on color film, using a new Kerr cell with a fluid which transmits the entire visible spectrum. The need for automatic data reduction techniques and for digital computer processing of data is also discussed.
- Plasma Physics and Magnetohydrodynamics