TITLE

Nonperturbative models of intermittency in edge turbulence

AUTHOR(S)
Anderson, Johan; Kim, Eun-jin
PUB. DATE
December 2008
SOURCE
Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p122303
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A theory of the probability distribution function (PDF) tails of the blob density in plasma edge turbulence is provided. A simplified model of the fast convective radial transport is used. The theoretically predicted PDF tails corroborate earlier measurements of edge transport, further confirming the strongly non-Gaussian feature of edge transport. It is found that increasing the cross-sectional spatial scale length (Lx and Ly) of the blob results in larger transport, whereas increasing the toroidal scale length (Lz) decreases the PDF. The results imply that the PDF decreases for larger blob speed vb.
ACCESSION #
35982590

 

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