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Development of a pumping laser system for x-ray laser research
Tetsuya Kawachi1, Masataka Kado, Momoko Tanaka
1Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, 8-1, Umemidai, Kizu, Kyoto 616-0215, Japan.
Abstract:
A two-beam chirped-pulse-amplification Nd:glass laser system dedicated to x-ray laser research is described. Each beam provides an output energy of 20 J with a typical pulse duration of 1.3 ps. A prepulse of variable duration is generated by use of a novel, to our knowledge, optical system. A reflection optical system, comprised of an off-axis parabolic mirror and a spherical mirror, produces a line focus with 6-mm length and 165-microm width without chromatic aberration. By use of this pumping laser system, the nickel-like silver x-ray laser at a wavelength of 13.9 nm has been demonstrated.