Numerical study on matching conditions of Langmuir parametric instability and the formation of Langmuir turbulence in ionospheric heating

Abstract

The frequency and wavevector matching conditions are investigated in detail to show the time evolution of the initial parametric decay instability stage and the cascade process.q Caviton collapse and strong Langmuir turbulence result in a discrete wavenumber spectrum extending to a continuous one.qThe effects of ion cavitons on Langmuir turbulence shown in the evolution of the spectra are analyzed as a complement to previous studies.