On the Issue of Large-Scale Helical Perturbations of Plasma Filament Caused by Small-Scale Instability

Oscillations are considered of a lengthy thin plasma filament with finite conductivity in the strong axial magnetic field. It is analyzed whether it is possible that the development of the small-scale instability of the electrostatic type localized near a certain magnetic surface can be accompanied by the large-scale motion of the entire plasma volume, which is similar to the ideal MHD mode, for which the magnetic field perturbations are significant. For the instability associated with the ion temperature inhomogeneity, the amplitude of such a perturbation is found.