Abstract
To obtain a high temperature plasma insulated by gas of atmospheric pressure, a newly developed gas flow system is proposed which induces an extremely larger pressure difference in the radial direction (over several hundreds Torrs) compared with the conventional one (several Torrs). This concept of “gas tunnel” in strong vortex gas flow has been verified by the experiment. Several points of excellence on the production of a high temperature plasma in the “gas tunnel” are emphasized.
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