Abstract
This contribution reports an experimental study of characteristics of the neutrals in a DC hydrogen discharge, designed for production of NiH. The investigations are carried out at gas pressure in the range p = (200–1600) mTorr and current I = 200 mA. Optical emission spectroscopy diagnostics are based on analysis of the Hα line profile. The profile is formed from the emission of three energetically distinct groups of atoms in the n = 3 excited state. The first one is the group of thermalized atoms, with a mean energy of about 0.1 eV, the second—fast atoms, with mean energies about 10 eV and the third—superfast atoms with a mean energy of about 90 eV. The experimental technique leads to accurate values of the relative densities of these atoms and their mean energies for various working conditions.
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