Collisionless damping of short wavelength geodesic acoustic modes

Zhiyong Qiu, Liu Chen, Fulvio Zonca

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Abstract

Collisionless damping of geodesic acoustic mode (GAM) excited in the large safety factor (q) region of a tokamak plasma is investigated taking into account the effects of finite ion Larmor radius and guiding-center drift orbit width as well as parallel electric field contributions. A corresponding analytical expression for the damping rate including higher-order harmonics of ion transit resonances is systematically derived and agrees well with numerical results in its validity regime. © 2009 IOP Publishing Ltd.
Original languageEnglish
Article number012001
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume51
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Nuclear Energy and Engineering

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