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Optimization of the wave front of high order harmonics

机译:高次谐波波前的优化

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We present a full optimization of the high harmonics wave front owing to the use of a soft X-ray Hartmann sensor. The sensor was calibrated using a high harmonic source with an accuracy of lambda/50 root-mean-square (rms) with lambda around 30 nm. We observed a high harmonic wave front of lambda/7 rms, which is two times the diffraction-limit, astigmatism being the dominant aberration for every condition of generation. By clipping slightly the unfocused high harmonic beam, it is possible to produce a diffraction-limited beam containing approximately 90% of the incident energy.
机译:由于使用了软X射线Hartmann传感器,我们对高谐波波阵面进行了全面优化。使用高谐波源校准传感器,其精度为λ/ 50均方根(rms),λ约为30 nm。我们观察到λ/ 7 rms的高谐波前沿,是衍射极限的两倍,像散是每种生成条件下的主要像差。通过稍微削散未聚焦的高谐波光束,可以产生包含约90%入射能量的衍射极限光束。

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