How about inserting one of these plasma devices inside a Mizuno R20 reactor with pretreatment of the D2 gas with KFeO2 as it passes through the supply pipe. Or supply it via a hollow anode as in the Safire set up. That is simply replace the heater with a plasma double layer UDD generator? It would run quite nice!y on 3 kV power supply taken out of a cheap plasma globe.
I would have to put it between the sink and the bidet somehow. To be serious the problem is the steel containment, which should be grounded and might cause some unexpected effect, and it would also screw any thermocouples - or potentially a heater inside. 3 kV even at microamps is not trivial. Also, since in a standard Mizuno reactor you cannot see inside ii would be difficult to be sure what was happening.