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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

High Power RF Plasma Torch Design using TRIFOU for 3D Field Computation

N. Aymard
Electricite de France - R&D Division - Centre des Renardieres Route de Sens - F-77818 Moret Sur Loing Cedex - France

M. Feliachi
LRTI-IUT/GE44 CRTT, Bd de I'Université, B.P. 406 44602 Saint Nazaire Cedex, France

Bernard Paya
Electricite de France - R&D Division - Centre des Renardieres Route de Sens - F-77818 Moret Sur Loing Cedex - France

G. Develey
LRTI-IUT/GE44 CRTT, Bd de I'Université, B.P. 406 44602 Saint Nazaire Cedex, France

Abstract

In order to improve the efficiency of high power plasma torches, we have studied the cold crucible with TRIFOU, the 3D electromagnetic field computation software developed by EDF. The computation gives information that can not be obtained experimentally, (e.g.: current distribution) but that is necessary for efficiency improvement. We also give the influence of parameters such as the number and the thickness of the cold crucible sectors. It is then possible to define the characteristics of the best torch, depending on the fact we want a good efficiency, a high power in the plasma or a low power loss.