Structure of longitudinal current in turbulent plasma flow
Abstract
This work is devoted to the experimental investigation of longitudinal current structure of turbulent plasma flow propagated in nonuniform axisymmetric magnetic field. In plasma column generated by arc discharge plasma source the longitudinal current of several kiloampers was measured. The system of 6 azimuthal magnetic probes disposed equidistant was used for measurement of local B_φ. The existence of mutual coherency of these signals makes it possible to represent oscillating longitudinal electric current by space modes and filaments. In the spectra of observed fluctuations the 3-d, 5-th and 7-th modes of main frequency of ExB rotation prevail. For each selected mode the value of filament current, filament radius and total cross mode displacement were determined by the data obtained from azimuthal magnetic probes. The time evolution of mode structure was also investigated. Work supported by grant N 00-02-17892 from RFBR and No.381 Ministry of Science, Russia.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2000
- Bibcode:
- 2000APS..DPPBP1107S