I recall that Brilliouin Energy Corporation advertises that specific pulsation is required for their process, although this
does not seem to have plasma discharge but more controlled electrolysis. Maybe unrelated.
I would agree with muon detectors required at almost all types of LENR reactions. If only they were easier and cheaper to obtain.
I believe that in the gas-loaded system they pass intense sharp pulse trains through the active material at a presumably resonant frequency to increase efficiency, but I haven't read much about their older electrolysis system.
The discharge events occurring on the cathode in plasma electrolysis are likely to be "sharp", but a single event will not be very energetic. When I checked the spontaneous RF spectrum of the plasma electrolysis reaction (i.e. the result of MHz rate micro arc discharging) I found it to be similar to 1/f noise.
As for muon detectors, one issue is that not just any muon detector (for instance intended for cosmic rays) will work. Otherwise, I tried a cheap webcam-based detector with inconclusive results (heat and background radiation affected noise and the number of detection events observed; strong EMI from the reaction occasionally caused it to stop working; I haven't been able to observe an event increase clearly attributable to the testing).