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Measured current waveforms at different neon pressures from two different plasma focus (PF) devices, namely, NX2 and NX1 are used for analysis using the Lee code. The model parameters of mass ($f_{m}$ and $f_{{\text {mr}}}$ ) and current ($f_{\text {c}}$ and $f_{\mathrm {cr}}$ ) in axial and radial phase, respectively, are obtained by fitting the computed current waveform to the measured current...