Comments on 'The time evolution of the resistances and inductances of the discharges in a pulsed gas laser through its current waveforms' [and reply]

摘要

Persephonis et al. (see ibid., vol.24, p.1208-14 (1996)) present a method for calculating the time evolution of the resistance and inductance from the measured current and voltage waveforms of a circuit. As it was pointed out by Fridman (1997), from those measurements, it is impossible to obtain a unique time evolution of the resistance and inductance; further hypothesis are needed to solve the problem. In this comment we analyze the results presented in the above paper and find several contradictory features, like violations to the Kirchoff's law. Finally, we stress the fact that during the fast breakdown of a gas gap characterized by large, fast varying values of the resistivity, it is impossible to meaningfully and separately define a resistance and an inductance as lumped parameters of a circuit.