21 March 2005 Focusing and collimation of laser-generated ultrashort x-ray pulses by polycapillary lenses
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Abstract
X-ray pulses from a fs-laser plasma were focused by an X-ray capillary lens, generating a spot smaller than 100 μm. Fe Kα radiation (λ = 0.194 nm) is produced by focusing 200 mJ/130 fs pulses from the ATLAS titanium-sapphire laser at 10 Hz onto a moving iron tape. The capillary lens enhanced the intensity by a factor of about 1600. Diffraction from samples of small size is demonstrated by producing diffractograms from a Si (111) crystal in only about 10 seconds. The model of a novel ultrafast streak camera which takes advantage of the different path lengths of rays propagating through the lens is demonstrated. Preliminary experiments using a semi-lens for collimating X-rays are also reported.
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Riccardo Tommasini, Reinhard Bruch, Ernst Fill, Aniouar Bjeoumikhov, "Focusing and collimation of laser-generated ultrashort x-ray pulses by polycapillary lenses", Proc. SPIE 5714, Commercial and Biomedical Applications of Ultrafast Lasers V, (21 March 2005); doi: 10.1117/12.591482; https://doi.org/10.1117/12.591482
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