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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Excitation of nonlinear ion acoustic wave (IAW) by an external electric fieldis demonstrated by Vlasov simulation. The frequency calculated by thedispersion relation with no damping is verified much closer to the resonancefrequency of the small-amplitude nonlinear IAW than that calculated by thelinear dispersion relation. When the wave number $ k\lambda_{De} $ increases,the linear Landau damping of the fast mode (its phase velocity is greater thanany ion's thermal velocity) increases obviously in the region of $ T_i/T_e <0.2 $ in which the fast mode is weakly damped mode. As a result, the deviationbetween the frequency calculated by the linear dispersion relation and that bythe dispersion relation with no damping becomes larger with $k\lambda_{De}$increasing. When $k\lambda_{De}$ is not large, such as $k\lambda_{De}=0.1, 0.3,0.5$, the nonlinear IAW can be excited by the driver with the linear frequencyof the modes. However, when $k\lambda_{De}$ is large, such as$k\lambda_{De}=0.7$, the linear frequency can not be applied to exciting thenonlinear IAW, while the frequency calculated by the dispersion relation withno damping can be applied to exciting the nonlinear IAW.

Excitation of nonlinear ion acoustic waves in CH plasmas