= Electron acoustic wave
= EAW
{c}
{synonym}
An electron-supported electrostatic branch with approximately linear small-<wavenumber> <dispersion relation> $\omega\simeq ku_a$. A <velocity plateau> can support such a completely undamped mode even when ion response is neglected. A single <Maxwellian> electron population generally damps the corresponding acoustic response strongly. Distinct electron populations provide another setting for electron acoustic behavior, with different assumptions and damping properties.
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