Theory of He+2+O2 charge exchange laser

The kinetics of the O+2 first-negative band laser due to near-resonance charge exchange between He+2 and O2 are presented. It can be excited in the afterglow of a discharge in a high-pressure He and O2 mixture (He≫O2). Gain calculation, however, is presented for discharges due to high-energy proton beams advocating their use for high-pressure gas lasers. In addition, a comment is made on the disappearance of 3914 laser lines with increasing N2 density in the He+2+N2 charge exchange laser.