Anomalous particle transport and flow shear in the edge region of RFP's

V. Antoni, H. Bergsåker, G. Serianni, M. Spolaore, N. Vianello, R. Cavazzana, G. Regnoli, E. Spada, E. Martines, M. Bagatin, J.R. Drake

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Abstract

The effect of the E × B velocity shear on the particle flux carried by electrostatic fluctuations at the edge is discussed comparing the results of the experiments T2R (R = 1.2 m, a = 0.18 m) and RFX (R = 2 m, a = 0.5 m). In both experiments electrostatic turbulence accounts for most of the particle flux. The shear of the E × B velocity is close or larger than the value required for turbulence suppression or reduction. Particle fluxes exhibit bursts which carry a large fraction of the total particle flux, and which tend to cluster during magnetic relaxation phase. On the average a Bohm estimate of the experimental plasma diffusivity accounts for the experimental data. Finally a discussion on the methods for turbulence control is given. © 2003 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)972 - 975
Number of pages4
JournalJournal of Nuclear Materials
Volume313-316
Issue numberSUPPL.
DOIs
Publication statusPublished - Mar 2003
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Antoni, V., Bergsåker, H., Serianni, G., Spolaore, M., Vianello, N., Cavazzana, R., ... Drake, J. R. (2003). Anomalous particle transport and flow shear in the edge region of RFP's. Journal of Nuclear Materials, 313-316(SUPPL.), 972 - 975. https://doi.org/10.1016/S0022-3115(02)01572-6