Spectroscopic study of neutral species in a pulsed hydrogen discharge
Abstract
The paper presents an experimental study of characteristics of neutral species in a DC hydrogen discharge in continuous and pulsed modes, designed for production of NiH. The investigations are carried out at gas pressures p = 200 and 500 mTorr and fixed current I = 200 mA. The diagnostics is based on analysis of the Hα line profile. A model describing the latter makes it possible to separate three energetically distinct groups of hydrogen atoms in the n = 3 excited state. The first one is the group of thermalized atoms, with mean energy of about 0.1 eV, the second - fast atoms, with mean energies of about 10 eV and third - superfast atoms with mean energy of about dozens eV. The diagnostics also provides estimation of the relative densities of different group of atoms as well as details on the main elementary processes in the plasma, responsible for their production, in continuous and pulsed DC discharges.
- Publication:
-
10th Jubilee International Conference of the Balkan Physical Union
- Pub Date:
- February 2019
- DOI:
- 10.1063/1.5091179
- Bibcode:
- 2019AIPC.2075f0001A