Progress in Plasma Processing of Materials, 1997

ISBN Print: 1-56700-093-2

INVESTIGATION OF ANODE PHENOMENA IN DC ARC PLASMA TORCH

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DOI: 10.1615/ITPPC-1996.10
pages 1-8

Milan Hrabovsky Institute of Plasma Physics, Academy of Sciences Za Slovankou 3, 182 00, Prague

M. Konrad TECOSIM Technische Simulation Gmbh Robert-Bosch-Str. 10, D-50769 Collogne, Germany; and Institute of Plasma Physics, Za Slovankou 3, 182 00, Praha 8, Czech Republic

Vladimir Kopecky Thermal Plasma Department, Institute of Plasma Physics AS CR, Za Slovankou 3, 18200, Praha 8, Czech Republic

V. Sember Institute of Plasma Physics, AS CR, Za Slovankou 3, P.O. Box 17, 182 21 Prague, Czech Republic

Abstrakt

Anode phenomena were investigated in dc arc plasma torch with water stabilized arc. The torch is equipped with external disc anode located downstream of the exit nozzle. Thus, direct observation of anode attachment region was possible as well as measurement of potential distribution in anode region using electric probes. Time changes of potential distribution in anode region were determined in the restrike anode mode from the probe measurements. Effect of anode. material on anode attachment motion was studied. Temperature of plasma in an anode jet was determined from spectroscopic measurements.

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