Mann, J.I. Arias, T. Karkare, S.S. Lawler, G.E. Nangoi, J.K. Rosenzweig, J.B. Wang, B. JACoW Publishing Geneva, Switzerland 2673-7000 978-3-95450-232-5 10.18429/JACoW-NAPAC2022-TUPA86 English 535-538 electron brightness laser emittance scattering Contribution to a conference proceedings 2022 2022-10 https://doi.org/10.18429/JACoW-NAPAC2022-TUPA86 https://jacow.org/napac2022/papers/tupa86.pdf Laser-induced field emission from nanostructures as a means to create high brightness electron beams has been a continually growing topic of study. Experiments using nanoblade emitters have achieved peak fields upwards of 40 GV/m according to semi-classical analyses, begging further theoretical investigation. A recent paper has provided analytical reductions of the common semi-infinite Jellium system for pulsed incident lasers. We utilize these results to further understand the physics underlying electron rescattering-type emissions. We numerically evaluate this analytical solution to efficiently produce spectra and yield curves. The effect of space-charge trapping at emission may be simply included by directly modifying these spectra. Additionally, we use a self-consistent 1-D time-dependent Schrödinger equation with an image charge potential to study the same system as a more exact, but computationally costly, approach. With these results we may finally investigate the mean transverse energy and beam brightness at the cathode in these extreme regimes.