Abstract
We have improved a highly coherent x-ray laser at using an oscillator–amplifier configuration. To improve a high-brilliance x-ray laser, we adopted traveling wave pumping for the amplifier target and rotated the amplifier target in the counterclockwise direction. Thereby, a seed x-ray laser can be amplified by medium plasma of the amplifier target with a high gain coefficient. The amplified x-ray laser has the output energy of , corresponding to a large photon flux of and a high peak brilliance of .
© 2008 Optical Society of America
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