Dynamo transformation of the collisional R-T in a weakly ionized plasma

Theoretical prediction of a new kind of normal mode behaviour of electro-me chanical nature was first time reported by Dwivedi and Das in 1992 in the c ontext of mesospheric modeling of observed neutral induced turbulence. Loca l dynamo action (due to relative neutral flow) governs the basic physical p rinciple for linear excitation of the neutral induced low frequency instabi lity (NILF) in mesospheric plasma, which comprises of weakly ionized inhomo geneous gas confined by the external gravity and ambient magnetic field. Th e present contribution offers physical explanation in terms of dynamo trans formation of neutral drag effect as a source to understand complete suppres sion of the usual collisional R-T and in turn linear driving of the NILF It is therefore emphasized, worth calling it as the dynamo instability.