Computer simulation results when Rb is set to 150 ohm

Numerical simulations with NI-Multisim had been done to verify the hypothesis. Fig. 5 illustrated the simulated waveform , when  was set to 150‍  W and  was set to 350‍  W. Fig.‍ 5(a) shows the simulated result when no inductance was considered. But for actual circuit, inductance is not negligible. When inductances were added to the circuit in series with the capacitance and resistance, the voltage step would be less steep, and oscillation would appear at the front period. Fig.‍ 5(b) shows the simulated waveform when 0.5‍ mH, 1‍ mH and 2‍ mH inductances are in series with sphere gap (FS),  and  respectively. These values were estimated according to the LI waveform generation circuit used in my test, and with an approximation that the lead inductance is around 1‍ mH/m.