Ion temperature gradient driven turbulence with strong trapped ion resonance

Yusuke Kosuga, Sanae Itoh, P. H. Diamond, K. Itoh, M. Lesur

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A theory to describe basic characterization of ion temperature gradient driven turbulence with strong trapped ion resonance is presented. The role of trapped ion granulations, clusters of trapped ions correlated by precession resonance, is the focus. Microscopically, the presence of trapped ion granulations leads to a sharp (logarithmic) divergence of two point phase space density correlation at small scales. Macroscopically, trapped ion granulations excite potential fluctuations that do not satisfy dispersion relation and so broaden frequency spectrum. The line width from emission due only to trapped ion granulations is calculated. The result shows that the line width depends on ion free energy and electron dissipation, which implies that non-adiabatic electrons are essential to recover non-trivial dynamics of trapped ion granulations. Relevant testable predictions are summarized.

Original languageEnglish
Article number102303
JournalPhysics of Plasmas
Volume21
Issue number10
DOIs
Publication statusPublished - Oct 1 2014

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ion temperature
temperature gradients
turbulence
ions
space density
precession
divergence
electrons
dissipation
energy dissipation
free energy
predictions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Ion temperature gradient driven turbulence with strong trapped ion resonance. / Kosuga, Yusuke; Itoh, Sanae; Diamond, P. H.; Itoh, K.; Lesur, M.

In: Physics of Plasmas, Vol. 21, No. 10, 102303, 01.10.2014.

Research output: Contribution to journalArticle

Kosuga, Yusuke ; Itoh, Sanae ; Diamond, P. H. ; Itoh, K. ; Lesur, M. / Ion temperature gradient driven turbulence with strong trapped ion resonance. In: Physics of Plasmas. 2014 ; Vol. 21, No. 10.
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