Arrangement for generating an active gas jet

Details Arrangement for generating an active gas jet Arrangement for generating an active gas jet

2005-09-13

2005-09-13

Campbell, Thor (Department: 3742)

Electric heating

Metal heating

By arc

C219S121520, C219S121560

Reexamination Certificate

active

06943316

ABSTRACT:
The invention is directed to an arrangement for generating a chemically active jet (active gas jet) by a plasma generated by electric discharge in a process gas. It is the object of the invention to find a novel possibility for generating a chemically active jet by a plasma generated by electric discharge in which high chemical activity develops at increased process gas velocity of the active gas jet on the surface to be treated and is electrically neutral already at the output of the arrangement, so that it does not pose a threat to the operating personnel, the environment and the treated surface. This object is met in that the discharge chamber has a conically narrowed end for increasing the velocity of the active gas jet, and a limiting channel for preventing propagation of the discharge zone into the free space for the surface to be treated is arranged following the narrowed end of the discharge chamber. The limiting channel is essentially cylindrical and is grounded and its length is greater than its cross section by a factor of 5 to 10.

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