E × B velocity shear and intermittent structures in RFX

E. Martines, M. Spolaore, V. Antoni, G. Regnoli, N. Vianello, R. Cavazzana, G. Serianni, L. Tramontin

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Abstract

Electrostatic turbulence in the edge region of the RFX device has been shown to be intermittent, i.e. not self-similar. In fact the probability distribution function of fluctuations at large scales is Gaussian in shape, whereas it displays strong tails for small scale fluctuations. The events responsible for these heavy tails are associated with turbulent structures with well defined density and floating potential spatial profiles, which have been characterised using arrays of probes. These structures tend to occur preferentially in correspondence to large scale magnetic relaxation events driven by core-resonant tearing modes. They also display an inclination related to the average velocity shear.
Original languageEnglish
Pages (from-to)983 - 993
Number of pages11
JournalCzechoslovak Journal of Physics
Volume51
Issue number10
DOIs
Publication statusPublished - Oct 2001
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Martines, E., Spolaore, M., Antoni, V., Regnoli, G., Vianello, N., Cavazzana, R., ... Tramontin, L. (2001). E × B velocity shear and intermittent structures in RFX. Czechoslovak Journal of Physics, 51(10), 983 - 993. https://doi.org/10.1023/A:1012881714423