Fig. 2: Ion signal measurements.
From: In situ characterization of laser-induced strong field ionization phenomena
a Example of measured (dotted blue curve) vs. calculated (solid red curve) ion signal temporal evolution for argon jet. The laser pulse energy was 0.6 mJ, and the gas backpressure was 7.5 Bar. The best fitted parameters were found \({R}_{{ID}}\left({t}_{0}\right)=13.27\,M\Omega\) and \({\tau }_{{ID}}=30.74\,\mu s\) with goodness of fit \({R}^{2}=0.98\). b Total charge (integrated current, modeled in LTspice and shown by dotted blue curve) vs. measured ion signal. The goodness of fit (solid red line) \({R}^{2}=0.999\)
