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28 September 2009 Plasma density-gradient measurement using x-ray laser wave-front distortion
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We present an experimentally simple technique for the measurement of electron density gradients in dense laser plasmas (the plasma region of electron density up to 1024 cm-3 can be investigated with the use of available XRLs). The distortion of the XRL wave-front caused by the gradients of the electron density is measured using Talbot pattern deformation. The plasma probed by the XRL is imaged on the CCD plane, then a 2D grating is put in front of the chip so that the Talbot plane of this grating fits on the CCD. The compromise between the spatial resolution and the sensitivity for the given wavelength of the probe must be set within the grating design. The main advantages of this method are low requirements on spatial coherence of the probing beam as well as the simple alignment, which are the main difficulties of interferometry using radiation of XRLs.
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Jaroslav Nejdl and Michaela Kozlová "Plasma density-gradient measurement using x-ray laser wave-front distortion", Proc. SPIE 7451, Soft X-Ray Lasers and Applications VIII, 745117 (28 September 2009);

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