High-resolution K -shell dielectronic satellite lines from laser-irradiated spot targets at 1.06, 0.53, and 0.27 μm wavelength

The Lyman-{α} and adjacent dielectronic satellite lines have been observed with high spatial and spectral resolution from laser-irradiated aluminum tracer dot targets at 1.06, 0.53, and 0.27 {μ}m wavelength. The 1s2p ³P-2p²³P to 1s2s ³S-2s2p ³P line-intensity ratio strongly increases for visible and uv laser wavelengths, indicating that time-integrated spectroscopic emissions from satellite lines probe higher electron densities under these laser-irradiation conditions. Numerical simulations including ground-state, singly excited and doubly excited levels of configurations 2lₐ2lb and 2lₐ3lb in a collisional-radiative equilibrium model including photon-pumping effects are in good agreement with experimental data. Plasma electric field broadening of satellite lines is also exhibited at high electron densities.