Willis
Using SS for both electrodes in my work requires a much higher input voltage than of course the carbon of one electrode. Likewise the preferred connection is with the cathode using carbon and the anode SS. Reversed direction will have a marked current difference.
Interesting. There are a number of reports of anomalies using carbon cathodes in arc or glow discharges, such as the work of Bill Alek. Have you weighed your cathode before and after to determine if there is significant mass loss?
Jones
