A cathodic arc plasma source has an anode formed of a plurality of spaced baffles which extend beyond the active cathode surface of the cathode. With the open baffle structure of the anode, most macroparticles pass through the gaps between the baffles and reflect off the baffles out of the plasma stream...http://www.google.com/patents/US6548817?utm_source=gb-gplus-sharePatent US6548817 - Miniaturized cathodic arc plasma source
