English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Parametric instabilities of parallel propagating, circularly polarized finiteamplitude Alfven waves in a uniform background plasma is studied, within aframework of one-dimensional Vlasov description for ions and massless electronfluid, so that kinetic perturbations in the longitudinal direction (ion Landaudamping) are included. The present formulation also includes the Hall effect.The obtained results agree well with relevant analysis in the past, suggestingthat kinetic effects in the longitudinal direction play essential roles in theparametric instabilities of Alfven waves when the kinetic effects react"passively". Furthermore, existence of the kinetic parametric instabilities isconfirmed for the regime with small wave number daughter waves. Growth rates ofthese instabilities are sensitive to ion temperature. The formulation andresults demonstrated here can be applied to Alfven waves observed in the solarwind and in the earth's foreshock region.Comment: 9 pages, 4 figures, accepted to Physics of Plasma

Kinetically modified parametric instabilities of circularly polarized Alfvén waves: Ion kinetic effects