Degenerate continuous spectra producing localized secular instability - An example in a non-neutral plasma

M. Hirota, T. Tatsuno, Z. Yoshida

研究成果: ジャーナルへの寄稿学術論文査読

6 被引用数 (Scopus)

抄録

Fluctuations in ambient shear flow exhibit interesting transient phenomena. Shear flow produces not only Kelvin-Helmholtz modes (global exponential instabilities represented by point spectra) but also local algebraic instabilities associated with multiple continuous spectra. Since the generating operator is non-Hermitian, the orthogonality of eigenmodes is broken, and unresolvable mode couplings (resonances) bring about secular behavior (algebraic instability). We analyze electrostatic fluctuations in a magnetized non-neutral (single species) plasma where the electrostatic potential parallels the stream function. This secular behavior is reproduced by solving the initial value problem with a renormalization method.

本文言語英語
ページ(範囲)397-412
ページ数16
ジャーナルJournal of Plasma Physics
69
5
DOI
出版ステータス出版済み - 2003 10月

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