Inner-shell excitation of atoms for the development of short wavelength laser sources
Petersen, Timothy Wayne
Wisoff, P. Jeffrey
Master of Science
This work focuses on the feasibility of producing new short wavelength laser sources using inner-shell photoionization or shake-up excitation induced by laser-produced plasma pumping. Laser-produced plasmas effectively convert high energy laser pulses into incoherent light in the XUV and are suitable pumping sources for high energy transitions. An experimental apparatus was constructed appropriate for preliminary studies in both barium and helium. For barium, dye laser excitation of an appropriate target state was explored as an initial step towards efficient pumping of core-excited states of the barium ion. In helium, studies explored methods to reduce the resonant trapping of the He(II) ion which limits the ability to produce an inversion on the n = 4 $\to$ 2 transition and the n = 3 $\to$ 2 transition.
Electronics; Electrical engineering; Atomic physics