Spectroscopic observation of fluctuation-induced dynamo in the edge of the reversed-field pinch.
The fluctuation-induced dynamo <v x b> has been investigated by direct measurement of v and b in the edge of a reversed-field pinch and is found to be significant in balancing Ohm's law. The velocity fluctuations producing the dynamo emf have poloidal mode number m = 0, consistent with MHD calculations and in contrast with the core m = 1 dynamo. The velocity fluctuations exhibit the parity relative to their resonant surface predicted by linear MHD theory.
Fontana
P W
PW
Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Den Hartog
D J
DJ
Fiksel
G
G
Prager
S C
SC