The Paton Welding Journal, 2001, №10

2001 №10 (11)

2001 №10 (13)

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The Paton Welding Journal, 2001, #10, 49-55 pages

Peculiarities of operation of hot tubular cathode heated by laser radiation

I.V. Krivtsun

E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Model of cathode processes for a hot tubular cathode of the laser-arc plasmatron, which takes into account additional heating of the working surface of the cathode by a passing laser beam, is suggested. Detailed computer modelling of cathode processes for the cathode under consideration was made. It is shown that additional laser heating can provide an efficient control of the cathode processes and, therefore, characteristics of plasma in the near-cathode region. The results obtained were used as the basis to design the cathode assembly for the laser-arc plasmatron intended for powder cladding. Experimental investigations of the plasmatron demonstrated a high operational stability and strength of the developed tubular cathode.
Keywords: hot tubular cathode, cathode processes, thermoemission, electric arc, laser beam, laser-arc plasmatron, investigations

References

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Suggested Citation

I.V. Krivtsun (2001) Peculiarities of operation of hot tubular cathode heated by laser radiation. The Paton Welding J., 10, 49-55.

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