27 September 2013 Wavefront of seeded soft x-ray laser based on a solid-target plasma amplifier
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Abstract
An experiment was set up to measure the wavefront of an injection-seeded soft x-ray laser based on a solid-target plasma amplifier. The 43rd harmonic signal from a Ti:Sa laser was used to seed a molybdenum plasma amplifier operating in the λ=18.9 nm line of Ni-like Mo. A Hartmann wavefront senor with an accuracy of λ/32 rms at this wavelength was employed to measure the wavefront of both the high harmonics seed and the seeded soft x-ray lasers. A significant improvement in wavefront aberration from 0.51±0.04λ rms to 0.25±0.03λ rms was observed as a function of plasma column length. The variation of wavefront characteristic by the time delay between the injection of the seed and the peak of soft x-ray amplifier pump was studied in this paper.
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Lu Li, Yong Wang, Shoujun Wang, Eduardo Oliva, Liang Yin, T. T. Thuy Le, Sameh Daboussi, David Ros, Gilles Maynard, Stephane Sebban, Bitao Hu, Jorge J. Rocca, Philippe Zeitoun, "Wavefront of seeded soft x-ray laser based on a solid-target plasma amplifier", Proc. SPIE 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X, 88490M (27 September 2013); doi: 10.1117/12.2024976; https://doi.org/10.1117/12.2024976
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