Experimental Research on Saturated-Gain for Soft X-Ray Laser from Neon-Like Germanium Plasma

Abstract

Amplification of sponbaneous emissions at 19.6, 23.2 and 23.6nm have been observed by a "Multiple-Target Series Coupling" design in Ge plasma. The combined length for four targets is up to 56". The gain length product(GL1of small signal is up to 18 for both lines at 23.2 and 23.6nm, and the effective GL is 16.4 and 15.7fox these two lines respectively. This two lines are obviously tending to saturation. The divergence of x-ray laser beam is about 4 mrad.