FIELD: physics.
SUBSTANCE: process involves plasma generation by multipolar atomic arc excitation source due to uniting of several unipolar arc discharges. Arc discharges are powered by parallel electric chains of unipolar arc discharges with separate capacity load and separate double-wave three-phase rectifier, linked directly (without transformer) to a three-phase alternate current source. One of the discharge electrodes is a cathode for all arcs. The substance under research is introduced into the plasma of multipolar arc discharge with the help of gas jet sucked downwards, and the sucked jet with the powder under investigation is directed downwards at the anode ends. To create favourable conditions for atom emission analysis spectral gas jet velocity in the analytical zone of the source is brought below 4 m/s, unipolar arc power at multipolar arc excitement source being adjusted below 20 A.
EFFECT: higher cost efficiency of the process due to exclusion of insulation transformer.
3 cl, 1 dwg
