On harmonics of epithermal infrared radiation of a plasma focus

Results of investigation of plasma focus epithermal radiation near plasma frequency and its second harmonic in the infrared region are presented. Infrared radiation have been investigated in the modes with one and two compressions. From the results obtained the conclusions have been made: plasma focus epithermal background radiation is due to power electron fluxes from preanode plasma; epithermal radiation harmonics spectra can be accounted for by representation on Langmuir turbulence: - anisotropic one - in case of low neutron yield (spontaneous scattering of Langmuir waves on electrons) and anisotropic one - in case of high neutron yield (Langmuir waves interaction); Langmuir wave energy density is low; thus the given process neither is responsible for anomalous relaxation of power electron fluxes in the plasma focus nor anisotropy of Langmuir turbulence itself arrising in case of high neutron yield