摘要
A simple D. C. are plasma jet device has been designed. A 5 mm diameter graphite rod used as a cathode axially and a neutral graphite orifice ring were put together to form a tube as a plasma chamber. Argon is used as the inert tangential swirl sheathing gas. An optimum flow rate of 0.5 l/min was selected. This device could be used directly for powder sample by putting it in the electrode cup as an anode and the cathode above and orifice ring is not soiled by spatterings
