Energy efficiency of a nanosecond repetitively pulsed ... Abstract. The performance of a nanosecond repetitively pulsed discharge for CH 4 reforming is studied at atmospheric pressure for temperatures ranging from 300 to 700 K. The high-voltage pulser used is capable of producing a voltage pulse with an amplitude of 14 kV and a duration of 40 ns at a repetition frequency of 10 kHz.