Relative dispersion of trapped ion granulations in sheared flows

Yusuke Kosuga, Sanae I. Itoh, Patrick H. Diamond, Kimitaka Itoh, Maxime Lesur

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Abstract

The life time of trapped ion granulations (trapped ions correlated by resonance) in sheared flows is calculated. The dynamics of trapped ion granulations, in the presence of sheared flows, is formulated in terms of two point correlation function of phase space density fluctuations. The evolution equation is closed by a simplified closure calculation of the triplet term. Based on the closed equation, the life time of the relative dispersion of trapped ion granulations is calculated. The result shows that i.) a relevant time scale enters via a hybrid of decorrelation and shearing, (Δωcν′2y)1/3 and ii.) small scale singularities in the absence of collisional dissipation enters through logarithmic divergence.

Original languageEnglish
Article number3403018
JournalPlasma and Fusion Research
Volume9
Issue numberSPECIALISSUE.2
DOIs
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Kosuga, Y., Itoh, S. I., Diamond, P. H., Itoh, K., & Lesur, M. (2014). Relative dispersion of trapped ion granulations in sheared flows. Plasma and Fusion Research, 9(SPECIALISSUE.2), [3403018]. https://doi.org/10.1585/pfr.9.3403018