Recombining plasma X-ray laser assisted by charge exchange recombination

摘要

Recombining plasma x-ray laser using charge exchange recombination (CXR) is proposed. Fully stripped carbon ions collide with neutral He atoms and become excited hydogenlike carbon ions, in which the excited levels with n = 3 or 4 are mainly populated. We calculated the gain coefficients of the Balmer a and Lyman β lines of the hydrogenlike carbon ions by the use of a collisional-radiative model in which the CXR process is included. The calculated result shows that substantial gain can be generated for the Lyman β and Balmer a lines and that the gain of the Balmer a line can be strongly enhanced by the effect of CXR. We also report a preliminary experiment of this scheme.