Predicting PDF tails of flux in plasma sheath region

Johan Anderson, Eun Jin Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


This letter provides the first prediction of the probability density function (PDF) of flux R in plasma sheath region in magnetic fusion devices which is characterized by dynamical equations with exponential non-linearities. By using a non-perturbative statistical theory (instantons), the PDF tails of first moment are shown to be a modified Gumbel distribution which represents a frequency distribution of the extreme values of the ensemble. The non-Gaussian PDF tails that may be enhanced over Gaussian predictions are the result of intermittency caused by short lived coherent structures (instantons).

Original languageEnglish
Article number012001
JournalPlasma Physics and Controlled Fusion
Issue number1
Publication statusPublished - 1 Dec 2009
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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