Pulse duration effects on laser-assisted electron transfer cross section for He2+ ions colliding with atomic hydrogen

摘要: We study the effect of pulse duration for an ultra-fast and intense laser on fundamental process electron capture by analyzing excitation probability into n = 2 3 states when He2+ collides with atomic hydrogen in 0.05–10 keV/amu energy range, a region interest diagnostic processes plasma fusion power reactors. solve time-dependent Schrodinger equation to calculate means finite-differences, as well electron-nuclear dynamics approach. In particular, we effects 1, 3, 6, 10 fs pulses at FWHM, wavelength 780 nm intensity 3.5 × 1012 W/cm2. report good agreement laser-free state total transfer cross-sections compared available theoretical experimental data. The function impact parameter is such that charge exchange increases considerably radial increase amplitude oscillations phase shift Stuckelberg oscillations. find cross-section low projectile collision case minimal high energies. 1 has effect, except very Although general, longer pulse, larger probability, energies all widths have effect. For atto-second region, our findings suggest enhance laser-assisted exchange, best short also s p cross section are equally affected. provide qualitative discussion these findings.