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Optimization of the wave front of high order harmonics

Abstract : 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 λ/50 root-mean-square (rms) with λ around 30 nm. We observed a high harmonic wave front of λ/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.
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Submitted on : Thursday, March 3, 2011 - 1:01:25 PM
Last modification on : Wednesday, May 11, 2022 - 3:22:04 PM

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Julien Gautier, Philippe Zeitoun, C. Hauri, Anne-Sophie Morlens, G. Rey, et al.. Optimization of the wave front of high order harmonics. The European Physical Journal D : Atomic, molecular, optical and plasma physics, EDP Sciences, 2008, 48 (3), pp.459-463. ⟨10.1140/epjd/e2008-00123-2⟩. ⟨hal-00573298⟩



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