Phys. Rev. Lett. 88, 045001 (2002) [4 pages]Experimental Evidence of Self-Regulation of Fluctuations by Time-Varying FlowsReceived 17 July 2001; published 8 January 2002 We report the first extended experimental results indicating that radially localized time-varying potential structures, which possess many of the characteristics of zonal flows, are generated by strong fluctuations. Experiments performed in the H-1 heliac show that these poloidally symmetric flows are nonlinearly coupled to other fluctuations and are responsible for significant modifications in fluctuations and in the fluctuation-driven transport. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.045001
DOI:
10.1103/PhysRevLett.88.045001
PACS:
52.35.Ra, 52.35.Mw, 52.55.Hc
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