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High-aspect-ratio line focus for an x-ray laser by a deformable mirror

机译：变形镜对X射线激光的高纵横比线聚焦

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A high-aspect-ratio line focus is required on a plane target in x-ray laser experiments for obtaining a high gain-length product. Inherent wave-front aberrations in line-focusing optics, which consist of a cylindrical lens and a spherical lens, are discussed with respect to beam diameter. The nonuniformity of the linewidth that is due to the aberrations is also calculated by the ABCD matrix method. A deformable mirror of a continuous plate type with a diameter of 185 mm provides an adequate wave-front distribution for compensating for the wave-front aberration. The wave-front control by the deformable mirror realizes a fine linewidth of 25 μm and 18.2 mm long, corresponding to the aspect ratio of 728. The linewidth is three times the diffraction limit. The intensity distribution along the line focus is also improved.#1997 Optical Society of America
机译：为了获得高增益长度乘积，在X射线激光实验中需要将高纵横比的线焦点聚焦在平面目标上。关于光束直径，讨论了由柱面透镜和球面透镜组成的线聚焦光学器件的固有波前像差。还通过ABCD矩阵方法来计算由于像差引起的线宽的不均匀性。直径为185 mm的连续板型可变形反射镜可提供足够的波前分布，以补偿波前像差。通过可变形反射镜进行的波前控制，可以实现25μm的精细线宽和18.2 mm的长线宽，对应于728的纵横比。该线宽是衍射极限的三倍。沿线焦点的强度分布也得到了改善。＃1997美国光学学会

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