TITLE

Langmuir wave filamentation instability

AUTHOR(S)
Rose, Harvey A.; Yin, L.
PUB. DATE
April 2008
SOURCE
Physics of Plasmas;Apr2008, Vol. 15 Issue 4, p042311
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A Langmuir wave (LW) model is constructed whose equilibria are consistent with stimulated Raman scatter optimization, with Hamiltonian dynamics, and with rotational invariance. Linear instability analysis includes terms to all orders in wave amplitude and fluctuation wavenumber expansions, δk. Resultant LW modulational instability is nonstandard: As the LW amplitude increases, the unstable δk range first expands and then shrinks to zero. Large amplitude wave model dynamics requires hyperdiffraction terms if kλD<0.45, lest artificially small length scales become unstable.
ACCESSION #
31881456

 

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