Fig. 6: Charge of accelerated electron bunches.
From: Plasma electron acceleration driven by a long-wave-infrared laser
a Total charge of > 1 MeV electrons vs. normalized peak power PL/Pcr of ~ 2 ps laser pulses driving LWFA in plasma of 4 densities in the range 0.4 × 1017≤ne≤4 × 1017 cm−3 as per key. b Data from a re-plotted as a function of \({a}_{0}^{(vac)}\). Color-coded arrows at top of a, b: electron appearance thresholds for each ne.
