NATURE OF DEVIATIONS FROM THE REGULARITIES OF THREE-PARTICLE RECOMBINATION IN DENSE PLASMA

An explanation is proposed for the phenomenon of deviations from the functional laws of three-particle recombination in dense electric arc plasma of argon at an initial electron density of ~ 1016 cm-3. Experimental data, which are the basis of the work, were obtained by spectral and probe methods during the study of plasma decay of a microsecond pulse electric arc in argon 6 µs at an initial pressure of 70...700 Pa and a discharge current amplitude of 6 kA. Theoretical estimates show that the reason of the observed effects is the self-absorption of resonant spectral lines of argon, which significantly limits the recombination flow of electrons in the energy structure of atoms.