X-ray laser beam with diffraction-limited divergence generated with two gain media |
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Authors: | Tanaka Momoko Nishikino Masaharu Kawachi Tetsuya Hasegawa Noboru Kado Masataka Kishimoto Maki Nagashima Keisuke Kato Yoshiaki |
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Institution: | Japan Atomic Energy Research Institute, 8-1-1-2, Umemidai, Kizu-cho, Souraku-gun, Kyoto, 619-0215, Japan. |
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Abstract: | We demonstrate an x-ray laser at a wavelength of 13.9 nm with a beam divergence of 0.2 mrad, which is 1.8 times the diffraction limit. The x-ray laser is generated with two gain media; the seed x-ray pulse from the first medium is amplified in the second medium. The effect of refraction on x-ray propagation is reduced by spatially and temporally controlling the injection of the seed x-ray to the second medium. |
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