ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The magnetohydrodynamic (MHD) activity and the discrete dynamo in high-aitch-theta reversed-field pinch (RFP) discharges are studied through comparisons with those in normal-aitch-theta RFP discharges, where aitch-theta=Bθ(a)/〈Bz〉 is the pinch parameter. In high-aitch-theta RFP discharges, the mode coupling of m=1 is enhanced by the high magnetic shear configuration, and the MHD activity is more turbulent as compared with that in normal-aitch-theta RFP discharges. Furthermore, the discrete increase of the toroidal magnetic flux is obviously observable. The increase of the toroidal magnetic flux generated by the discrete dynamo, which has an asymmetric structure in the toroidal direction, is only 1%–2% of the whole toroidal magnetic flux. The experimental results indicate that the discrete dynamo does not play an essential role in the RFP dynamo.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.860820
