High performance induction plasma torch
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United States of America Patent
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Jun 28, 2016
Grant Date -
Oct 18, 2012
app pub date -
Feb 2, 2012
filing date -
Feb 3, 2011
priority date (Note) -
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Abstract
A plasma confinement tube for use in an induction plasma torch is disclosed. The plasma confinement tube defines a geometrical axis and an outer surface. The plasma confinement tube includes a capacitive shield comprising a film of conductive material applied to the outer surface of the plasma confinement tube and segmented into axial strips. The axial strips are interconnected at one end. Axial grooves are machined in the outer surface of the plasma confinement tube, and interposed between the axial strips. The conductive film may have a thickness smaller than a skin-depth calculated for a frequency of operation of the induction plasma torch and an electrical conductivity of the conductive material of the film.
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