Nonlinear mechanism for the generation of electromagnetic fields in a magnetized plasma by the beatings of waves

One studies the modulation instability in a plasma medium within a strong constant magnetic field. One uses beating of two high-frequency transverse electromagnetic waves propagating along the magnetic field to modulate condensate of plasmons in place of the conventional low-frequency ion sound. One determined the conditions of evolution and the increment of aperiodic instability resulting in scale reduction of the Langmuir turbulence along the external magnetic field and in generation of electromagnetic fields. It is shown that for rather high amplitudes of the excitation waves the effect described here may be the governing nonlinear process