Direct measurement of the temporal profile of the amplification gain of the transient collisional excitation neonlike manganese x-ray laser medium

Abstract

The temporal profile of the amplification gain of the neonlike manganese x-ray laser in the transient collisional excitation scheme was measured by the use of the 29th-order harmonic light at a wavelength of 26.9 nm as a probe beam. The raise-up time of the gain was delayed by 20 ps from the peak of the pumping laser pulse, and the duration of the gain was 50 ps. This method is a promising powerful tool to realize the highly coherent x-ray laser beam by using a combination of an x-ray seeder and an x-ray amplifier.